https://iesoqa-public.sharepoint.com/Pages/News/Archive_Advisory_Notices_Summary.aspx IESO Archive System Advisory Messages Fri, 03 Apr 2026 11:01 EST http://www.ieso.ca/SiteAssets/ieso-logo.gif http://www.ieso.ca en-us Copyright 2016 http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9902346 Dispatch Service Thu, 02 Apr 2026 12:21 EST 9902346 252811 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. Thu, 02 Apr 2026 23:25 EST Thu, 02 Apr 2026 23:40 EST Thu, 02 Apr 2026 12:21 EST Thu, 02 Apr 2026 12:21 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9902115 Flexibility Event Forecasted Thu, 02 Apr 2026 05:49 EST 9902115 252804 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 03 Apr 2026 00:00 EST Fri, 03 Apr 2026 11:00 EST Thu, 02 Apr 2026 05:49 EST Thu, 02 Apr 2026 05:49 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9902985 Demand Response Erroneous Standby Notices Thu, 02 Apr 2026 17:38 EST 9902985 252803 2 Demand Response Erroneous Standby Notices Due to an tool error, HDR Resources were incorrectly scheduled and issued Standby notices for the Trade Date 04/02/2026. Capacity market participants are directed to disregard the Standby Notices and manage bids accordingly. Thu, 02 Apr 2026 03:28 EST Thu, 02 Apr 2026 17:38 EST Thu, 02 Apr 2026 03:31 EST Thu, 02 Apr 2026 17:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9902084 Demand Response Erroneous Standby Notices Thu, 02 Apr 2026 03:31 EST 9902084 252803 1 Demand Response Erroneous Standby Notices Due to an tool error, HDR Resources were incorrectly scheduled and issued Standby notices for the Trade Date 04/02/2026. Capacity market participants are directed to disregard the Standby Notices and manage bids accordingly. Thu, 02 Apr 2026 03:28 EST Thu, 02 Apr 2026 23:59 EST Thu, 02 Apr 2026 03:31 EST Thu, 02 Apr 2026 03:31 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9888846 Dispatch Service Wed, 01 Apr 2026 06:59 EST 9888846 252761 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. Wed, 01 Apr 2026 15:30 EST Wed, 01 Apr 2026 15:45 EST Wed, 01 Apr 2026 06:59 EST Wed, 01 Apr 2026 06:59 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9876750 Pre-emptive Curtailments Beginning Tue, 31 Mar 2026 23:58 EST 9876750 252742 1 Pre-emptive Curtailments Beginning The IESO is pre-emptively curtailing NYISO transactions due to external curtailment impacting the same transactions. This is to reduce the impact of the curtailments. Tue, 31 Mar 2026 23:57 EST Wed, 01 Apr 2026 23:59 EST Tue, 31 Mar 2026 23:58 EST Tue, 31 Mar 2026 23:58 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9888447 Pre-emptive Curtailments Beginning Wed, 01 Apr 2026 03:50 EST 9888447 252742 2 Pre-emptive Curtailments Beginning The IESO is pre-emptively curtailing NYISO transactions due to external curtailment impacting the same transactions. This is to reduce the impact of the curtailments. Tue, 31 Mar 2026 23:57 EST Wed, 01 Apr 2026 03:50 EST Tue, 31 Mar 2026 23:58 EST Wed, 01 Apr 2026 03:50 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9876439 Transmission Rights Auction (TRA) will be unavailable Tue, 31 Mar 2026 13:32 EST 9876439 252736 1 Transmission Rights Auction (TRA) will be unavailable Transmission Rights Auction (TRA) will be unavailable Wed, 01 Apr 2026 02:40 EST Wed, 01 Apr 2026 03:25 EST Tue, 31 Mar 2026 13:32 EST Tue, 31 Mar 2026 13:32 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9875117 Dispatch Service Tue, 31 Mar 2026 08:08 EST 9875117 252703 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Wed, 01 Apr 2026 14:20 EST Wed, 01 Apr 2026 14:25 EST Tue, 31 Mar 2026 08:08 EST Tue, 31 Mar 2026 08:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9863388 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface Tue, 31 Mar 2026 01:17 EST 9863388 252702 1 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface OCSS Web User Interface will be unavailable for outage submission and retrieval. Tue, 31 Mar 2026 01:30 EST Tue, 31 Mar 2026 02:15 EST Tue, 31 Mar 2026 01:17 EST Tue, 31 Mar 2026 01:17 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9863387 5-minute Wind Forecast Disabled Mon, 30 Mar 2026 21:28 EST 9863387 252701 1 5-minute Wind Forecast Disabled Wind output is approximately 300 MW over forecast. The 5-minute variable generation forecast has been disabled as of 21:25. Mon, 30 Mar 2026 21:25 EST Tue, 31 Mar 2026 00:00 EST Mon, 30 Mar 2026 21:28 EST Mon, 30 Mar 2026 21:28 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9863291 Dispatch service UI and API Mon, 30 Mar 2026 14:56 EST 9863291 252694 1 Dispatch service UI and API Market Participants will loose access to the dispatch service UI and API for the duration of the planned outage. Tue, 31 Mar 2026 20:20 EST Tue, 31 Mar 2026 20:40 EST Mon, 30 Mar 2026 14:56 EST Mon, 30 Mar 2026 14:56 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9876644 Dispatch service UI and API Tue, 31 Mar 2026 20:31 EST 9876644 252694 2 Dispatch service UI and API Market Participants will loose access to the dispatch service UI and API for the duration of the planned outage. Tue, 31 Mar 2026 20:20 EST Tue, 31 Mar 2026 21:00 EST Mon, 30 Mar 2026 14:56 EST Tue, 31 Mar 2026 20:31 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9863290 OKTA User Authentication Outage Mon, 30 Mar 2026 14:50 EST 9863290 252692 1 OKTA User Authentication Outage Market Participants will lose access to OKTA user authentication and may be unable to access IESO tools, including EMI, the TRA Dispatch Service, and Online IESO. Any applications or interfaces already open are not expected to lose connectivity. For questions or assistance, please contact the IESO Control Room. Tue, 31 Mar 2026 01:35 EST Tue, 31 Mar 2026 02:10 EST Mon, 30 Mar 2026 14:50 EST Mon, 30 Mar 2026 14:50 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9863386 OKTA User Authentication Outage Mon, 30 Mar 2026 16:10 EST 9863386 252692 2 OKTA User Authentication Outage Market Participants will lose access to OKTA user authentication and may be unable to access IESO tools, including EMI, the TRA, Dispatch Service, and Online IESO. Any applications or interfaces already open are not expected to lose connectivity. For questions or assistance, please contact the IESO Control Room. Tue, 31 Mar 2026 01:35 EST Tue, 31 Mar 2026 02:10 EST Mon, 30 Mar 2026 14:50 EST Mon, 30 Mar 2026 16:10 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9862341 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface Mon, 30 Mar 2026 06:24 EST 9862341 252647 1 Outage Coordination and Scheduling System (OCSS) - CROW Web Interface OCSS Web User Interface will be unavailable for outage submission and retrieval. Mon, 30 Mar 2026 20:30 EST Mon, 30 Mar 2026 21:15 EST Mon, 30 Mar 2026 06:24 EST Mon, 30 Mar 2026 06:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9790266 EMI/EMAT - Unplanned Market Tool Outage Resolved Wed, 25 Mar 2026 00:57 EST 9790266 252546 1 EMI/EMAT - Unplanned Market Tool Outage Resolved The IESO has resolved the tool issues with the EMI application. Market Participants are advised to resume normal usage of this application and contact IESO should they experience any issues. Wed, 25 Mar 2026 00:55 EST Wed, 25 Mar 2026 23:59 EST Wed, 25 Mar 2026 00:57 EST Wed, 25 Mar 2026 00:57 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9790267 EMI/EMAT - Unplanned Market Tool Outage Wed, 25 Mar 2026 01:04 EST 9790267 252545 2 EMI/EMAT - Unplanned Market Tool Outage The IESO is experiencing tool issues with the EMI/EMAT application. IT personnel are currently investigating. Wed, 25 Mar 2026 00:33 EST Wed, 25 Mar 2026 01:04 EST Wed, 25 Mar 2026 00:33 EST Wed, 25 Mar 2026 01:04 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9790265 EMI/EMAT - Unplanned Market Tool Outage Wed, 25 Mar 2026 00:33 EST 9790265 252545 1 EMI/EMAT - Unplanned Market Tool Outage The IESO is experiencing tool issues with the EMI/EMAT application. IT personnel are currently investigating. Wed, 25 Mar 2026 00:33 EST Wed, 25 Mar 2026 06:00 EST Wed, 25 Mar 2026 00:33 EST Wed, 25 Mar 2026 00:33 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9753987 Flexibility Event Forecasted Sat, 21 Mar 2026 14:59 EST 9753987 252255 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sat, 21 Mar 2026 15:00 EST Sat, 21 Mar 2026 18:00 EST Sat, 21 Mar 2026 14:59 EST Sat, 21 Mar 2026 14:59 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9742276 Geomagnetic Kp7 Forecast Sat, 21 Mar 2026 01:26 EST 9742276 252252 2 Geomagnetic Kp7 Forecast A geomagnetic disturbance warning of Kp7 for the next 10 hours has been issued. Notify the IESO of any abnormal behavior. Fri, 20 Mar 2026 15:31 EST Sat, 21 Mar 2026 01:26 EST Fri, 20 Mar 2026 15:53 EST Sat, 21 Mar 2026 01:26 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9742250 Geomagnetic Kp7 Forecast Fri, 20 Mar 2026 15:53 EST 9742250 252252 1 Geomagnetic Kp7 Forecast A geomagnetic disturbance warning of Kp7 for the next 10 hours has been issued. Notify the IESO of any abnormal behavior. Fri, 20 Mar 2026 15:31 EST Sat, 21 Mar 2026 02:00 EST Fri, 20 Mar 2026 15:53 EST Fri, 20 Mar 2026 15:53 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9717078 HEXX Run of Pre-Dispatch Completed Successfully Wed, 18 Mar 2026 22:29 EST 9717078 252228 1 HEXX Run of Pre-Dispatch Completed Successfully Pre-dispatch is running normally and IESO is no longer using the HE20 results. HE21 pre dispatch results are valid. Wed, 18 Mar 2026 22:25 EST Wed, 18 Mar 2026 23:59 EST Wed, 18 Mar 2026 22:29 EST Wed, 18 Mar 2026 22:29 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9717076 DR Erroneous Standby Notice Wed, 18 Mar 2026 22:08 EST 9717076 252227 1 DR Erroneous Standby Notice Due to a tool error, HDR Resources were incorrectly scheduled and issued Standby notices for Trade Date March 19th 2026. Market Participants are directed to disregard the Standby notices and manage bids accordingly. Wed, 18 Mar 2026 22:06 EST Thu, 19 Mar 2026 08:00 EST Wed, 18 Mar 2026 22:08 EST Wed, 18 Mar 2026 22:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9717073 HEXX Run of Pre-Dispatch Did Not Complete Wed, 18 Mar 2026 20:21 EST 9717073 252226 1 HEXX Run of Pre-Dispatch Did Not Complete Due to technical difficulties, the pre-dispatch result from HE21 is not available. IESO will use the pre-dispatch result from HE20 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Wed, 18 Mar 2026 20:19 EST Wed, 18 Mar 2026 23:59 EST Wed, 18 Mar 2026 20:21 EST Wed, 18 Mar 2026 20:21 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9717074 HEXX Run of Pre-Dispatch Did Not Complete Wed, 18 Mar 2026 21:10 EST 9717074 252226 2 HEXX Run of Pre-Dispatch Did Not Complete Due to technical difficulties, the pre-dispatch result from HE22 is not available. IESO will use the pre-dispatch result from HE20 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Wed, 18 Mar 2026 20:19 EST Wed, 18 Mar 2026 23:59 EST Wed, 18 Mar 2026 20:21 EST Wed, 18 Mar 2026 21:10 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9717077 HEXX Run of Pre-Dispatch Did Not Complete Wed, 18 Mar 2026 22:25 EST 9717077 252226 3 HEXX Run of Pre-Dispatch Did Not Complete Due to technical difficulties, the pre-dispatch result from HE22 is not available. IESO will use the pre-dispatch result from HE20 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Wed, 18 Mar 2026 20:19 EST Wed, 18 Mar 2026 22:25 EST Wed, 18 Mar 2026 20:21 EST Wed, 18 Mar 2026 22:25 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9704302 Flexibility Event Forecasted Tue, 17 Mar 2026 21:38 EST 9704302 252190 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Wed, 18 Mar 2026 06:00 EST Wed, 18 Mar 2026 12:00 EST Tue, 17 Mar 2026 21:38 EST Tue, 17 Mar 2026 21:38 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9703561 IESO Reports Site Tue, 17 Mar 2026 03:39 EST 9703561 252158 2 IESO Reports Site Due to an unforeseen technical issue, Market Participants may experience issues viewing their private/confidential reports this hour. The IESO is aware, and staff are currently troubleshooting the issue. Please contact the IESO Control Room if you need to verify any schedules for the upcoming hour. Tue, 17 Mar 2026 02:57 EST Tue, 17 Mar 2026 03:39 EST Tue, 17 Mar 2026 02:59 EST Tue, 17 Mar 2026 03:39 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9703536 IESO Reports Site Tue, 17 Mar 2026 02:59 EST 9703536 252158 1 IESO Reports Site Due to an unforeseen technical issue, Market Participants may experience issues viewing their private/confidential reports this hour. The IESO is aware, and staff are currently troubleshooting the issue. Please contact the IESO Control Room if you need to verify any schedules for the upcoming hour. Tue, 17 Mar 2026 02:57 EST Tue, 17 Mar 2026 06:00 EST Tue, 17 Mar 2026 02:59 EST Tue, 17 Mar 2026 02:59 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9690939 Flexibility Event Forecasted Mon, 16 Mar 2026 05:26 EST 9690939 252084 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Tue, 17 Mar 2026 00:00 EST Tue, 17 Mar 2026 08:00 EST Mon, 16 Mar 2026 05:26 EST Mon, 16 Mar 2026 05:26 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9679259 Automated Dispatch Resuming Sun, 15 Mar 2026 22:16 EST 9679259 252083 1 Automated Dispatch Resuming Earlier issue with Dispatch Service have been resolved. Please restart and login to the Dispatch Service again to receive IESO dispatches Sun, 15 Mar 2026 22:14 EST Sun, 15 Mar 2026 23:00 EST Sun, 15 Mar 2026 22:16 EST Sun, 15 Mar 2026 22:16 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9679239 Flexibility Event Forecasted Sun, 15 Mar 2026 05:34 EST 9679239 252080 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Mon, 16 Mar 2026 00:00 EST Mon, 16 Mar 2026 23:59 EST Sun, 15 Mar 2026 05:34 EST Sun, 15 Mar 2026 05:34 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9691616 Advanced Notice of Conservative Operations Mon, 16 Mar 2026 12:51 EST 9691616 252077 2 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 15 Mar 2026 06:00 EST Mon, 16 Mar 2026 12:51 EST Sat, 14 Mar 2026 08:00 EST Mon, 16 Mar 2026 12:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9667553 Advanced Notice of Conservative Operations Sat, 14 Mar 2026 08:00 EST 9667553 252077 1 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 15 Mar 2026 06:00 EST Mon, 16 Mar 2026 23:59 EST Sat, 14 Mar 2026 08:00 EST Sat, 14 Mar 2026 08:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9667530 Flexibility Event Forecasted Sat, 14 Mar 2026 05:55 EST 9667530 252076 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sun, 15 Mar 2026 14:00 EST Sun, 15 Mar 2026 23:59 EST Sat, 14 Mar 2026 05:55 EST Sat, 14 Mar 2026 05:55 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9655479 Flexibility Event Forecasted Fri, 13 Mar 2026 06:22 EST 9655479 252055 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sat, 14 Mar 2026 00:00 EST Sat, 14 Mar 2026 04:00 EST Fri, 13 Mar 2026 06:22 EST Fri, 13 Mar 2026 06:22 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9643785 Generation Biasing Thu, 12 Mar 2026 20:31 EST 9643785 252051 1 Generation Biasing Generation biasing may be required for planned switching of C7BM. Fri, 13 Mar 2026 09:30 EST Fri, 13 Mar 2026 10:00 EST Thu, 12 Mar 2026 20:31 EST Thu, 12 Mar 2026 20:31 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9642837 Dispatch Service Thu, 12 Mar 2026 11:08 EST 9642837 251985 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Mar 2026 11:08 EST Thu, 12 Mar 2026 11:15 EST Thu, 12 Mar 2026 11:08 EST Thu, 12 Mar 2026 11:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9642469 Flexibility Event Forecasted Thu, 12 Mar 2026 05:29 EST 9642469 251980 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 13 Mar 2026 08:00 EST Fri, 13 Mar 2026 23:59 EST Thu, 12 Mar 2026 05:29 EST Thu, 12 Mar 2026 05:29 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9643793 Flexibility Event Forecasted Thu, 12 Mar 2026 21:00 EST 9643793 251980 2 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 13 Mar 2026 02:00 EST Fri, 13 Mar 2026 23:59 EST Thu, 12 Mar 2026 05:29 EST Thu, 12 Mar 2026 21:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9630328 Dispatch Service Wed, 11 Mar 2026 10:29 EST 9630328 251962 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Mar 2026 10:50 EST Thu, 12 Mar 2026 10:55 EST Wed, 11 Mar 2026 10:29 EST Wed, 11 Mar 2026 10:29 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9642821 Dispatch Service Thu, 12 Mar 2026 10:50 EST 9642821 251962 3 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Mar 2026 10:50 EST Thu, 12 Mar 2026 11:05 EST Wed, 11 Mar 2026 10:29 EST Thu, 12 Mar 2026 10:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9642809 Dispatch Service Thu, 12 Mar 2026 10:48 EST 9642809 251962 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Mar 2026 10:50 EST Thu, 12 Mar 2026 11:00 EST Wed, 11 Mar 2026 10:29 EST Thu, 12 Mar 2026 10:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9630327 Dispatch Service Wed, 11 Mar 2026 10:29 EST 9630327 251961 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Mar 2026 10:25 EST Thu, 12 Mar 2026 10:40 EST Wed, 11 Mar 2026 10:29 EST Wed, 11 Mar 2026 10:29 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9704301 Generation Biasing Tue, 17 Mar 2026 15:59 EST 9704301 251938 2 Generation Biasing Generation biassing may be required to facilitate planned switching on Des Joachims W1 Bus. Tue, 17 Mar 2026 17:30 EST Tue, 17 Mar 2026 18:00 EST Wed, 11 Mar 2026 10:09 EST Tue, 17 Mar 2026 15:59 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9630293 Generation Biasing Wed, 11 Mar 2026 10:09 EST 9630293 251938 1 Generation Biasing Generation biassing may be required to facilitate planned switching on Des Joachims W1 Bus. Tue, 17 Mar 2026 15:30 EST Tue, 17 Mar 2026 16:00 EST Wed, 11 Mar 2026 10:09 EST Wed, 11 Mar 2026 10:09 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9629227 Conservative Operating State Wed, 11 Mar 2026 01:39 EST 9629227 251933 1 Conservative Operating State The IESO has declared a Conservative Operating State due to freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Wed, 11 Mar 2026 01:30 EST Wed, 11 Mar 2026 23:59 EST Wed, 11 Mar 2026 01:39 EST Wed, 11 Mar 2026 01:39 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9617529 5-minute Wind Forecast Disabled Tue, 10 Mar 2026 22:06 EST 9617529 251931 1 5-minute Wind Forecast Disabled Wind output is approximately 600 MW over forecast. The 5-minute variable generation forecast has been disabled as of 22:00. Tue, 10 Mar 2026 22:04 EST Wed, 11 Mar 2026 08:00 EST Tue, 10 Mar 2026 22:06 EST Tue, 10 Mar 2026 22:06 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9603892 IESO Workspaces Tue, 10 Mar 2026 06:31 EST 9603892 251851 1 IESO Workspaces All workspaces will be unavailable during this period. Wed, 11 Mar 2026 13:00 EST Wed, 11 Mar 2026 16:30 EST Tue, 10 Mar 2026 06:31 EST Tue, 10 Mar 2026 06:31 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9603891 IESO Workspaces Tue, 10 Mar 2026 06:30 EST 9603891 251850 1 IESO Workspaces All workspaces will be unavailable during this period. Tue, 10 Mar 2026 13:15 EST Tue, 10 Mar 2026 13:30 EST Tue, 10 Mar 2026 06:30 EST Tue, 10 Mar 2026 06:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9630792 Advanced Notice of Conservative Operations Wed, 11 Mar 2026 17:59 EST 9630792 251814 3 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Wed, 11 Mar 2026 00:00 EST Wed, 11 Mar 2026 17:59 EST Mon, 09 Mar 2026 07:44 EST Wed, 11 Mar 2026 17:59 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9604461 Advanced Notice of Conservative Operations Tue, 10 Mar 2026 12:19 EST 9604461 251814 2 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Wed, 11 Mar 2026 00:00 EST Thu, 12 Mar 2026 01:00 EST Mon, 09 Mar 2026 07:44 EST Tue, 10 Mar 2026 12:19 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9590663 Advanced Notice of Conservative Operations Mon, 09 Mar 2026 07:44 EST 9590663 251814 1 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted freezing rain. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Wed, 11 Mar 2026 00:00 EST Wed, 11 Mar 2026 23:59 EST Mon, 09 Mar 2026 07:44 EST Mon, 09 Mar 2026 07:44 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9590642 Market Tool Outage - OMB Mon, 09 Mar 2026 06:00 EST 9590642 251813 1 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Tue, 10 Mar 2026 13:15 EST Tue, 10 Mar 2026 15:00 EST Mon, 09 Mar 2026 06:00 EST Mon, 09 Mar 2026 06:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9578986 Flexibility Event Forecasted Sun, 08 Mar 2026 05:11 EST 9578986 251809 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Mon, 09 Mar 2026 04:00 EST Mon, 09 Mar 2026 15:00 EST Sun, 08 Mar 2026 05:11 EST Sun, 08 Mar 2026 05:11 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9567344 Flexibility Event Forecasted Sat, 07 Mar 2026 06:48 EST 9567344 251806 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sun, 08 Mar 2026 11:00 EST Sun, 08 Mar 2026 17:00 EST Sat, 07 Mar 2026 06:48 EST Sat, 07 Mar 2026 06:48 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9554218 Dispatch Service Fri, 06 Mar 2026 09:38 EST 9554218 251758 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. Fri, 06 Mar 2026 09:20 EST Fri, 06 Mar 2026 09:38 EST Fri, 06 Mar 2026 09:06 EST Fri, 06 Mar 2026 09:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9554208 Dispatch Service Fri, 06 Mar 2026 09:06 EST 9554208 251758 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. Fri, 06 Mar 2026 09:20 EST Fri, 06 Mar 2026 09:40 EST Fri, 06 Mar 2026 09:06 EST Fri, 06 Mar 2026 09:06 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9554199 Flexibility Event Forecasted Fri, 06 Mar 2026 07:01 EST 9554199 251757 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sat, 07 Mar 2026 07:00 EST Sat, 07 Mar 2026 17:00 EST Fri, 06 Mar 2026 07:01 EST Fri, 06 Mar 2026 07:01 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9554183 Flexibility Event Forecasted Fri, 06 Mar 2026 03:28 EST 9554183 251756 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 06 Mar 2026 15:00 EST Fri, 06 Mar 2026 22:00 EST Fri, 06 Mar 2026 03:28 EST Fri, 06 Mar 2026 03:28 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9540276 Generation Biasing Thu, 05 Mar 2026 10:57 EST 9540276 251711 1 Generation Biasing Generation biasing may be required to facilitate planned switching on Double HxTs (1-00298259) Tue, 10 Mar 2026 08:00 EST Tue, 10 Mar 2026 08:15 EST Thu, 05 Mar 2026 10:57 EST Thu, 05 Mar 2026 10:57 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528530 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 17:07 EST 9528530 251710 1 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced. IT staff are currently investigating. IESO CR will dispatch resources verbally as required. Please contact the IESO CR with any dispatch verification questions. Thank you. Wed, 04 Mar 2026 17:06 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 17:07 EST Wed, 04 Mar 2026 17:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528534 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 17:54 EST 9528534 251710 2 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced. IT staff are currently investigating. IESO CR will dispatch resources verbally as required. Please contact the IESO CR with any dispatch verification questions. Thank you. Wed, 04 Mar 2026 17:06 EST Wed, 04 Mar 2026 17:54 EST Wed, 04 Mar 2026 17:07 EST Wed, 04 Mar 2026 17:54 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528233 Energy market data submission Wed, 04 Mar 2026 13:29 EST 9528233 251665 2 Energy market data submission We are currently experiencing an unplanned tool outage that may prevent dispatch data submissions from being accepted by the IESO. All market participants are advised to monitor advisory notices for updates and to refrain from making changes to dispatch data at this time, as submission errors may occur. IESO staff are actively investigating the issue. Wed, 04 Mar 2026 13:05 EST Wed, 04 Mar 2026 13:29 EST Wed, 04 Mar 2026 13:08 EST Wed, 04 Mar 2026 13:29 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528229 Energy market data submission Wed, 04 Mar 2026 13:08 EST 9528229 251665 1 Energy market data submission We are currently experiencing an unplanned tool outage that may prevent dispatch data submissions from being accepted by the IESO. All market participants are advised to monitor advisory notices for updates and to refrain from making changes to dispatch data at this time, as submission errors may occur. IESO staff are actively investigating the issue. Wed, 04 Mar 2026 13:05 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 13:08 EST Wed, 04 Mar 2026 13:08 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528277 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 14:08 EST 9528277 251664 2 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced. IT staff are currently investigating. IESO CR will dispatch resources verbally as required. Please contact the IESO CR with any dispatch verification questions. Thank you. Wed, 04 Mar 2026 12:49 EST Wed, 04 Mar 2026 14:08 EST Wed, 04 Mar 2026 12:50 EST Wed, 04 Mar 2026 14:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528221 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 12:50 EST 9528221 251664 1 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced. IT staff are currently investigating. IESO CR will dispatch resources verbally as required. Please contact the IESO CR with any dispatch verification questions. Thank you. Wed, 04 Mar 2026 12:49 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 12:50 EST Wed, 04 Mar 2026 12:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528219 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 12:48 EST 9528219 251663 1 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced and/or being sent late. IT staff are currently investigating. Please contact the IESO CR with any Dispatch verification questions. Thank you Wed, 04 Mar 2026 12:47 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 12:48 EST Wed, 04 Mar 2026 12:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528220 Dispatch Service / Resource Dispatch Wed, 04 Mar 2026 12:49 EST 9528220 251663 2 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced and/or being sent late. IT staff are currently investigating. Please contact the IESO CR with any Dispatch verification questions. Thank you Wed, 04 Mar 2026 12:47 EST Wed, 04 Mar 2026 12:49 EST Wed, 04 Mar 2026 12:48 EST Wed, 04 Mar 2026 12:49 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528227 Energy market data submission Wed, 04 Mar 2026 13:04 EST 9528227 251653 2 Energy market data submission Due to an unplanned tool outage, dispatch data submissions made between 10:20 AM and 11:20 AM may not have been accepted by the IESO. Market participants must review and, if necessary, resubmit all dispatch data—including bids and offers—for changes made during this time period. The tool issue has been resolved and normal functionality has been restored. Wed, 04 Mar 2026 11:34 EST Wed, 04 Mar 2026 13:04 EST Wed, 04 Mar 2026 11:51 EST Wed, 04 Mar 2026 13:04 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528212 Energy market data submission Wed, 04 Mar 2026 11:51 EST 9528212 251653 1 Energy market data submission Due to an unplanned tool outage, dispatch data submissions made between 10:20 AM and 11:20 AM may not have been accepted by the IESO. Market participants must review and, if necessary, resubmit all dispatch data—including bids and offers—for changes made during this time period. The tool issue has been resolved and normal functionality has been restored. Wed, 04 Mar 2026 11:34 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 11:51 EST Wed, 04 Mar 2026 11:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528218 Dispatch service available from unplanned outage Wed, 04 Mar 2026 12:47 EST 9528218 251644 2 Dispatch service available from unplanned outage Automatic/electronic dispatching is back to normal operation. All market participants are requested to follow their electronic dispatch. Wed, 04 Mar 2026 11:22 EST Wed, 04 Mar 2026 12:47 EST Wed, 04 Mar 2026 11:24 EST Wed, 04 Mar 2026 12:47 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528123 Dispatch service available from unplanned outage Wed, 04 Mar 2026 11:24 EST 9528123 251644 1 Dispatch service available from unplanned outage Automatic/electronic dispatching is back to normal operation. All market participants are requested to follow their electronic dispatch. Wed, 04 Mar 2026 11:22 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 11:24 EST Wed, 04 Mar 2026 11:24 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528122 Unplanned Outage to Dispatch Services Wed, 04 Mar 2026 11:22 EST 9528122 251643 2 Unplanned Outage to Dispatch Services Automatic/electronic dispatching is currently unavailable due to an unplanned market tool outage. The IESO will issue dispatch instructions over the phone as required. Wed, 04 Mar 2026 10:44 EST Wed, 04 Mar 2026 11:22 EST Wed, 04 Mar 2026 10:44 EST Wed, 04 Mar 2026 11:22 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9528110 Unplanned Outage to Dispatch Services Wed, 04 Mar 2026 10:44 EST 9528110 251643 1 Unplanned Outage to Dispatch Services Automatic/electronic dispatching is currently unavailable due to an unplanned market tool outage. The IESO will issue dispatch instructions over the phone as required. Wed, 04 Mar 2026 10:44 EST Wed, 04 Mar 2026 23:59 EST Wed, 04 Mar 2026 10:44 EST Wed, 04 Mar 2026 10:44 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9516412 Dispatch Service / Resource Dispatch Tue, 03 Mar 2026 19:24 EST 9516412 251642 1 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced and/or being sent late. IT staff are currently investigating. Please contact the IESO CR with any Dispatch verification questions. Thank you Tue, 03 Mar 2026 19:20 EST Tue, 03 Mar 2026 23:59 EST Tue, 03 Mar 2026 19:24 EST Tue, 03 Mar 2026 19:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9516419 Dispatch Service / Resource Dispatch Tue, 03 Mar 2026 23:16 EST 9516419 251642 2 Dispatch Service / Resource Dispatch The IESO is currently experiencing intermittent failures of dispatch instructions not being produced and/or being sent late. IT staff are currently investigating. Please contact the IESO CR with any Dispatch verification questions. Thank you Tue, 03 Mar 2026 19:20 EST Tue, 03 Mar 2026 23:16 EST Tue, 03 Mar 2026 19:24 EST Tue, 03 Mar 2026 23:16 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9516331 IESO Reports Site Tue, 03 Mar 2026 15:42 EST 9516331 251641 1 IESO Reports Site Due to a planned IT outage, MP private/public reports could be delayed being published this hour. Wed, 04 Mar 2026 10:00 EST Wed, 04 Mar 2026 11:00 EST Tue, 03 Mar 2026 15:42 EST Tue, 03 Mar 2026 15:42 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9503428 Generation Biasing Mon, 02 Mar 2026 13:14 EST 9503428 251597 1 Generation Biasing Generation biasing may be required for planned switching of B6M Fri, 06 Mar 2026 15:00 EST Fri, 06 Mar 2026 15:30 EST Mon, 02 Mar 2026 13:14 EST Mon, 02 Mar 2026 13:14 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9478629 Flexibility Event Forecasted Sat, 28 Feb 2026 02:59 EST 9478629 251574 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sat, 28 Feb 2026 06:00 EST Sat, 28 Feb 2026 10:00 EST Sat, 28 Feb 2026 02:59 EST Sat, 28 Feb 2026 02:59 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9466720 EMI Fri, 27 Feb 2026 11:48 EST 9466720 251535 1 EMI EMI is the Web UI component of the Market Information Management(MIM) solution used to submit dispatch data. EMI will be momentarily unavailable, Users may get disconnected and will need to login and verify access. eMIM API will be momentarily unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access Fri, 27 Feb 2026 13:30 EST Fri, 27 Feb 2026 14:00 EST Fri, 27 Feb 2026 11:48 EST Fri, 27 Feb 2026 11:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9466788 EMI Fri, 27 Feb 2026 13:38 EST 9466788 251535 2 EMI EMI is the Web UI component of the Market Information Management(MIM) solution used to submit dispatch data. EMI will be momentarily unavailable, Users may get disconnected and will need to login and verify access. eMIM API will be momentarily unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access Fri, 27 Feb 2026 13:30 EST Fri, 27 Feb 2026 13:38 EST Fri, 27 Feb 2026 11:48 EST Fri, 27 Feb 2026 13:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9466292 Flexibility Event Forecasted Fri, 27 Feb 2026 06:54 EST 9466292 251499 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Sat, 28 Feb 2026 00:00 EST Sat, 28 Feb 2026 04:00 EST Fri, 27 Feb 2026 06:54 EST Fri, 27 Feb 2026 06:54 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9454059 Flexibility Event Forecasted Thu, 26 Feb 2026 06:37 EST 9454059 250678 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 27 Feb 2026 19:00 EST Fri, 27 Feb 2026 23:59 EST Thu, 26 Feb 2026 06:37 EST Thu, 26 Feb 2026 06:37 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9414821 Dispatch Service Mon, 23 Feb 2026 06:43 EST 9414821 250500 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 24 Feb 2026 14:00 EST Tue, 24 Feb 2026 14:35 EST Mon, 23 Feb 2026 06:43 EST Mon, 23 Feb 2026 06:43 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9414822 Dispatch Service Mon, 23 Feb 2026 06:44 EST 9414822 250500 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Tue, 24 Feb 2026 14:35 EST Tue, 24 Feb 2026 14:50 EST Mon, 23 Feb 2026 06:43 EST Mon, 23 Feb 2026 06:44 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9414823 DR Erroneous Standby Notice Mon, 23 Feb 2026 06:44 EST 9414823 250499 2 DR Erroneous Standby Notice Due to an input error, a EAST HDR Resource was incorrectly scheduled and issued Standby notices for Trade Date 02/23/2026. Capacity market participants are directed to disregard the Standby Notices and manage bids accordingly. Sun, 22 Feb 2026 13:37 EST Mon, 23 Feb 2026 06:44 EST Sun, 22 Feb 2026 13:38 EST Mon, 23 Feb 2026 06:44 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9403202 DR Erroneous Standby Notice Sun, 22 Feb 2026 13:38 EST 9403202 250499 1 DR Erroneous Standby Notice Due to an input error, a EAST HDR Resource was incorrectly scheduled and issued Standby notices for Trade Date 02/23/2026. Capacity market participants are directed to disregard the Standby Notices and manage bids accordingly. Sun, 22 Feb 2026 13:37 EST Mon, 23 Feb 2026 23:59 EST Sun, 22 Feb 2026 13:38 EST Sun, 22 Feb 2026 13:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9379366 Dispatch Service Fri, 20 Feb 2026 07:13 EST 9379366 250482 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Fri, 20 Feb 2026 08:30 EST Fri, 20 Feb 2026 08:40 EST Fri, 20 Feb 2026 07:13 EST Fri, 20 Feb 2026 07:13 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367748 Generation Biasing Thu, 19 Feb 2026 22:34 EST 9367748 250481 1 Generation Biasing Generation biasing may be required for planned switching of C7BM. Tue, 24 Feb 2026 08:00 EST Tue, 24 Feb 2026 08:30 EST Thu, 19 Feb 2026 22:34 EST Thu, 19 Feb 2026 22:34 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367745 5-minute Wind Forecast Disabled Thu, 19 Feb 2026 21:05 EST 9367745 250480 2 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Thu, 19 Feb 2026 20:34 EST Thu, 19 Feb 2026 21:05 EST Thu, 19 Feb 2026 20:34 EST Thu, 19 Feb 2026 21:05 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367744 5-minute Wind Forecast Disabled Thu, 19 Feb 2026 20:34 EST 9367744 250480 1 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Thu, 19 Feb 2026 20:34 EST Fri, 20 Feb 2026 00:00 EST Thu, 19 Feb 2026 20:34 EST Thu, 19 Feb 2026 20:34 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367560 Dispatch Service Thu, 19 Feb 2026 14:59 EST 9367560 250471 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 19 Feb 2026 15:25 EST Thu, 19 Feb 2026 15:35 EST Thu, 19 Feb 2026 14:59 EST Thu, 19 Feb 2026 14:59 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367561 Dispatch Service Thu, 19 Feb 2026 15:00 EST 9367561 250470 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 19 Feb 2026 15:10 EST Thu, 19 Feb 2026 14:59 EST Thu, 19 Feb 2026 14:56 EST Thu, 19 Feb 2026 15:00 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367553 Dispatch Service Thu, 19 Feb 2026 14:56 EST 9367553 250470 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 19 Feb 2026 15:10 EST Thu, 19 Feb 2026 15:20 EST Thu, 19 Feb 2026 14:56 EST Thu, 19 Feb 2026 14:56 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9354877 5-minute Wind Forecast Disabled Wed, 18 Feb 2026 20:24 EST 9354877 250421 2 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Wed, 18 Feb 2026 18:48 EST Wed, 18 Feb 2026 20:24 EST Wed, 18 Feb 2026 18:49 EST Wed, 18 Feb 2026 20:24 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9354865 5-minute Wind Forecast Disabled Wed, 18 Feb 2026 18:49 EST 9354865 250421 1 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Wed, 18 Feb 2026 18:48 EST Thu, 19 Feb 2026 00:00 EST Wed, 18 Feb 2026 18:49 EST Wed, 18 Feb 2026 18:49 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9354355 Dispatch Service Wed, 18 Feb 2026 13:11 EST 9354355 250408 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 19 Feb 2026 16:25 EST Thu, 19 Feb 2026 16:35 EST Wed, 18 Feb 2026 13:11 EST Wed, 18 Feb 2026 13:11 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9354354 Dispatch Service Wed, 18 Feb 2026 13:10 EST 9354354 250407 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 19 Feb 2026 14:25 EST Thu, 19 Feb 2026 14:35 EST Wed, 18 Feb 2026 13:10 EST Wed, 18 Feb 2026 13:10 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9367746 Gen Biasing for B1S 1-00305843 Thu, 19 Feb 2026 21:08 EST 9367746 250393 2 Gen Biasing for B1S 1-00305843 Gen biasing may be required for planned switching of B1S. Fri, 20 Feb 2026 08:00 EST Thu, 19 Feb 2026 21:08 EST Tue, 17 Feb 2026 15:00 EST Thu, 19 Feb 2026 21:08 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9342126 Gen Biasing for B1S 1-00305843 Tue, 17 Feb 2026 15:00 EST 9342126 250393 1 Gen Biasing for B1S 1-00305843 Gen biasing may be required for planned switching of B1S. Fri, 20 Feb 2026 08:00 EST Sun, 22 Feb 2026 16:00 EST Tue, 17 Feb 2026 15:00 EST Tue, 17 Feb 2026 15:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9354217 Dispatch Service Wed, 18 Feb 2026 11:22 EST 9354217 250363 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Wed, 18 Feb 2026 14:35 EST Wed, 18 Feb 2026 11:22 EST Tue, 17 Feb 2026 08:52 EST Wed, 18 Feb 2026 11:22 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9339181 Dispatch Service Tue, 17 Feb 2026 08:52 EST 9339181 250363 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Wed, 18 Feb 2026 14:35 EST Wed, 18 Feb 2026 14:50 EST Tue, 17 Feb 2026 08:52 EST Tue, 17 Feb 2026 08:52 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9291597 17:02 Run of Pre-dispatch Successful Fri, 13 Feb 2026 17:23 EST 9291597 250362 1 17:02 Run of Pre-dispatch Successful The 17:02 run of Pre Dispatch completed successfully and may be used. Fri, 13 Feb 2026 17:19 EST Fri, 13 Feb 2026 18:00 EST Fri, 13 Feb 2026 17:23 EST Fri, 13 Feb 2026 17:23 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9291579 16:02 run of Pre-dispatch did not complete Fri, 13 Feb 2026 16:17 EST 9291579 250359 1 16:02 run of Pre-dispatch did not complete The 16:02 run of Pre Dispatch did not complete due to an unknow issue. Please use the 15:02 run of Pre-dispatch which is valid. Staff are investigating. Fri, 13 Feb 2026 16:15 EST Fri, 13 Feb 2026 17:00 EST Fri, 13 Feb 2026 16:17 EST Fri, 13 Feb 2026 16:17 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9291620 5-minute Wind Forecast Disabled Fri, 13 Feb 2026 19:04 EST 9291620 250358 2 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Fri, 13 Feb 2026 14:56 EST Fri, 13 Feb 2026 19:04 EST Fri, 13 Feb 2026 14:59 EST Fri, 13 Feb 2026 19:04 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9291528 5-minute Wind Forecast Disabled Fri, 13 Feb 2026 14:59 EST 9291528 250358 1 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Fri, 13 Feb 2026 14:56 EST Fri, 13 Feb 2026 23:00 EST Fri, 13 Feb 2026 14:59 EST Fri, 13 Feb 2026 14:59 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9267081 Dispatch Service Thu, 12 Feb 2026 10:21 EST 9267081 250326 2 Dispatch Service Electronic dispatch instructions for ENERGY will be unavailable but can still be sent for activating OPERATING RESERVE, if required. The IESO may manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify access after the outage. Thu, 12 Feb 2026 13:15 EST Thu, 12 Feb 2026 13:55 EST Wed, 11 Feb 2026 07:53 EST Thu, 12 Feb 2026 10:21 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9254407 Dispatch Service Wed, 11 Feb 2026 07:53 EST 9254407 250326 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Feb 2026 13:15 EST Thu, 12 Feb 2026 13:55 EST Wed, 11 Feb 2026 07:53 EST Wed, 11 Feb 2026 07:53 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9241899 Dispatch Service Tue, 10 Feb 2026 08:11 EST 9241899 250287 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 12 Feb 2026 10:30 EST Thu, 12 Feb 2026 10:40 EST Tue, 10 Feb 2026 08:11 EST Tue, 10 Feb 2026 08:11 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9241876 Pre-emptive MICH-ONT Transaction Curtailments Tue, 10 Feb 2026 05:21 EST 9241876 250286 1 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Tue, 10 Feb 2026 05:20 EST Wed, 11 Feb 2026 00:00 EST Tue, 10 Feb 2026 05:21 EST Tue, 10 Feb 2026 05:21 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9242503 Pre-emptive MICH-ONT Transaction Curtailments Tue, 10 Feb 2026 10:52 EST 9242503 250286 2 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Tue, 10 Feb 2026 05:20 EST Tue, 10 Feb 2026 10:52 EST Tue, 10 Feb 2026 05:21 EST Tue, 10 Feb 2026 10:52 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9230304 Conservative Operating State Mon, 09 Feb 2026 20:07 EST 9230304 250285 1 Conservative Operating State The IESO is no longer in a Conservative Operating state based on forecast weather and supply conditions. Mon, 09 Feb 2026 20:00 EST Tue, 10 Feb 2026 00:00 EST Mon, 09 Feb 2026 20:07 EST Mon, 09 Feb 2026 20:07 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9230303 Pre-emptive MICH-ONT Transaction Curtailments Mon, 09 Feb 2026 19:44 EST 9230303 250283 2 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Mon, 09 Feb 2026 14:38 EST Mon, 09 Feb 2026 19:44 EST Mon, 09 Feb 2026 14:39 EST Mon, 09 Feb 2026 19:44 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9230176 Pre-emptive MICH-ONT Transaction Curtailments Mon, 09 Feb 2026 14:39 EST 9230176 250283 1 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Mon, 09 Feb 2026 14:38 EST Mon, 09 Feb 2026 23:00 EST Mon, 09 Feb 2026 14:39 EST Mon, 09 Feb 2026 14:39 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9217779 Pre-emptive MICH-ONT Transaction Curtailments Sun, 08 Feb 2026 16:30 EST 9217779 250275 2 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Sun, 08 Feb 2026 15:52 EST Sun, 08 Feb 2026 23:00 EST Sun, 08 Feb 2026 16:07 EST Sun, 08 Feb 2026 16:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9217778 Pre-emptive MICH-ONT Transaction Curtailments Sun, 08 Feb 2026 16:07 EST 9217778 250275 1 Pre-emptive MICH-ONT Transaction Curtailments The IESO is pre-emptively curtailing MICH-ONT transaction(s) 90 minutes in advance due to an external TLR that has been persistently curtailing the same transaction(s). Sun, 08 Feb 2026 15:52 EST Sun, 08 Feb 2026 19:00 EST Sun, 08 Feb 2026 16:07 EST Sun, 08 Feb 2026 16:07 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9217758 Pre-emptive Curtailments Beginning Sun, 08 Feb 2026 04:22 EST 9217758 250267 2 Pre-emptive Curtailments Beginning The IESO is pre-emptively curtailing MISI, 90 min before each dispatch hour, due to an external TLR impacting the same transactions. This is to reduce the impact of hourly real time TLR cuts. Sat, 07 Feb 2026 21:46 EST Sun, 08 Feb 2026 04:30 EST Sat, 07 Feb 2026 21:51 EST Sun, 08 Feb 2026 04:22 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9206185 Pre-emptive Curtailments Beginning Sat, 07 Feb 2026 21:51 EST 9206185 250267 1 Pre-emptive Curtailments Beginning The IESO is pre-emptively curtailing MISI, 90 min before each dispatch hour, due to an external TLR impacting the same transactions. This is to reduce the impact of hourly real time TLR cuts. Sat, 07 Feb 2026 21:46 EST Sun, 08 Feb 2026 06:00 EST Sat, 07 Feb 2026 21:51 EST Sat, 07 Feb 2026 21:51 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9206184 Conservative Operating State Sat, 07 Feb 2026 20:56 EST 9206184 250266 2 Conservative Operating State The IESO has declared a Conservative Operating State based on forecast weather and supply conditions. The IESO may take actions to recall outages or suspend switching to maintain reliability. Sun, 08 Feb 2026 04:00 EST Sun, 08 Feb 2026 23:59 EST Sat, 07 Feb 2026 17:01 EST Sat, 07 Feb 2026 20:56 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9217757 Conservative Operating State Sun, 08 Feb 2026 03:57 EST 9217757 250266 3 Conservative Operating State The IESO has declared a Conservative Operating State based on forecast weather and supply conditions. The IESO may take actions to recall outages or suspend switching to maintain reliability. Sun, 08 Feb 2026 04:00 EST Mon, 09 Feb 2026 20:00 EST Sat, 07 Feb 2026 17:01 EST Sun, 08 Feb 2026 03:57 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9206183 Conservative Operating State Sat, 07 Feb 2026 17:01 EST 9206183 250266 1 Conservative Operating State The IESO has declared a Conservative Operating State based on forecast weather and supply conditions. The IESO may take actions to recall outages or suspend switching to maintain reliability. Sun, 08 Feb 2026 04:00 EST Sun, 08 Feb 2026 23:59 EST Sat, 07 Feb 2026 17:01 EST Sat, 07 Feb 2026 17:01 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9230167 Generation Biasing Mon, 09 Feb 2026 13:39 EST 9230167 250234 2 Generation Biasing Generation biasing may be required for planned switching of B1S. Fri, 13 Feb 2026 15:00 EST Mon, 09 Feb 2026 13:38 EST Fri, 06 Feb 2026 10:10 EST Mon, 09 Feb 2026 13:39 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9182101 Generation Biasing Fri, 06 Feb 2026 10:10 EST 9182101 250234 1 Generation Biasing Generation biasing may be required for planned switching of B1S. Fri, 13 Feb 2026 15:00 EST Fri, 13 Feb 2026 16:00 EST Fri, 06 Feb 2026 10:10 EST Fri, 06 Feb 2026 10:10 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9182100 Generation Biasing Fri, 06 Feb 2026 10:09 EST 9182100 250233 1 Generation Biasing Generation biasing may be required for planned switching of B1S. Mon, 09 Feb 2026 09:00 EST Mon, 09 Feb 2026 10:00 EST Fri, 06 Feb 2026 10:09 EST Fri, 06 Feb 2026 10:09 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9169860 DAM Results Delay Thu, 05 Feb 2026 13:10 EST 9169860 250211 1 DAM Results Delay DAM Results are delayed due to tool issues. Expect results by 14:30 EPT. This will also extend the day-ahead market restricted window until valid results are published. Thu, 05 Feb 2026 13:08 EST Thu, 05 Feb 2026 14:30 EST Thu, 05 Feb 2026 13:10 EST Thu, 05 Feb 2026 13:10 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9217774 Advanced Notice of Conservative Operations Sun, 08 Feb 2026 08:46 EST 9217774 250197 4 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 08 Feb 2026 04:00 EST Sun, 08 Feb 2026 08:46 EST Thu, 05 Feb 2026 11:17 EST Sun, 08 Feb 2026 08:46 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9206182 Advanced Notice of Conservative Operations Sat, 07 Feb 2026 08:21 EST 9206182 250197 3 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 08 Feb 2026 04:00 EST Sun, 08 Feb 2026 23:59 EST Thu, 05 Feb 2026 11:17 EST Sat, 07 Feb 2026 08:21 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9169700 Advanced Notice of Conservative Operations Thu, 05 Feb 2026 11:17 EST 9169700 250197 1 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 08 Feb 2026 02:00 EST Sun, 08 Feb 2026 06:00 EST Thu, 05 Feb 2026 11:17 EST Thu, 05 Feb 2026 11:17 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9182099 Advanced Notice of Conservative Operations Fri, 06 Feb 2026 10:09 EST 9182099 250197 2 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 08 Feb 2026 04:00 EST Sun, 08 Feb 2026 08:00 EST Thu, 05 Feb 2026 11:17 EST Fri, 06 Feb 2026 10:09 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9157824 Pre-Dispatch Wed, 04 Feb 2026 23:52 EST 9157824 250189 1 Pre-Dispatch Pre-Dispatch is running slower than expected and reports/schedule may take longer to publish. If you have any questions regarding your pre-dispatch schedule/reports, contact the IESO. Wed, 04 Feb 2026 23:49 EST Thu, 05 Feb 2026 09:00 EST Wed, 04 Feb 2026 23:52 EST Wed, 04 Feb 2026 23:52 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9157030 Dispatch Service Wed, 04 Feb 2026 06:56 EST 9157030 250180 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 05 Feb 2026 11:56 EST Thu, 05 Feb 2026 12:10 EST Wed, 04 Feb 2026 06:56 EST Wed, 04 Feb 2026 06:56 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9169394 Dispatch Service Thu, 05 Feb 2026 02:29 EST 9169394 250180 2 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 05 Feb 2026 11:30 EST Thu, 05 Feb 2026 12:10 EST Wed, 04 Feb 2026 06:56 EST Thu, 05 Feb 2026 02:29 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9132674 MBSK Commercially Unavailable Mon, 02 Feb 2026 09:08 EST 9132674 250106 1 MBSK Commercially Unavailable With SK1 O/S, MBSK will be commercially unavailable. Any participant that submits bids/offers will have their schedules curtailed to 0 MW and will be subject to failure charges Tue, 03 Feb 2026 07:45 EST Tue, 03 Feb 2026 16:15 EST Mon, 02 Feb 2026 09:08 EST Mon, 02 Feb 2026 09:08 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9391584 IESO Operating from Backup Control Centre Sat, 21 Feb 2026 17:42 EST 9391584 250105 2 IESO Operating from Backup Control Centre The IESO has transferred operating control from the Primary Control Centre to the Backup Control Centre as 18:00 EST. Alternate/backup MSAT, Iridium satellite and FAX numbers are to be used, Main contact phone numbers have not changed Sun, 01 Feb 2026 17:43 EST Sun, 29 Mar 2026 06:00 EST Sun, 01 Feb 2026 17:42 EST Sat, 21 Feb 2026 17:42 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9121069 IESO Operating from Backup Control Centre Sun, 01 Feb 2026 17:42 EST 9121069 250105 1 IESO Operating from Backup Control Centre The IESO has transferred operating control from the Primary Control Centre to the Backup Control Centre as 18:00 EST. Alternate/backup MSAT, Iridium satellite and FAX numbers are to be used, Main contact phone numbers have not changed Sun, 01 Feb 2026 17:43 EST Mon, 02 Mar 2026 06:00 EST Sun, 01 Feb 2026 17:42 EST Sun, 01 Feb 2026 17:42 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9121066 DAM Results Delay Sun, 01 Feb 2026 12:47 EST 9121066 250104 1 DAM Results Delay DAM Results are delayed due to tool issues. Expect results by 15:30 EPT. This will also extend the day-ahead market restricted window until valid results are published. Sun, 01 Feb 2026 12:47 EST Sun, 01 Feb 2026 15:30 EST Sun, 01 Feb 2026 12:47 EST Sun, 01 Feb 2026 12:47 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9084847 Conservative Operating State Thu, 29 Jan 2026 18:47 EST 9084847 249911 1 Conservative Operating State The IESO has declared a Conservative Operating State. The IESO may take actions to recall outages or suspend switching to maintain reliability. Fri, 30 Jan 2026 00:00 EST Fri, 30 Jan 2026 09:00 EST Thu, 29 Jan 2026 18:47 EST Thu, 29 Jan 2026 18:47 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9084780 DR Erroneous Activation Notice Thu, 29 Jan 2026 16:01 EST 9084780 249910 1 DR Erroneous Activation Notice The activation notice issued to Hourly Demand Response (HDR) resources for Trade Date January 29, 2026, following the 14:02 pre-dispatch run, was sent in error. Market Participants are advised to disregard this activation notice. Thu, 29 Jan 2026 15:56 EST Thu, 29 Jan 2026 23:59 EST Thu, 29 Jan 2026 16:01 EST Thu, 29 Jan 2026 16:01 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9084637 Pre-emptive Curtailments Beginning Thu, 29 Jan 2026 14:23 EST 9084637 249901 1 Pre-emptive Curtailments Beginning The IESO is pre-emptively curtailing NYSI transactions due to external curtailment impacting the same transactions. This is to reduce the impact of the curtailments. Thu, 29 Jan 2026 14:21 EST Thu, 29 Jan 2026 23:59 EST Thu, 29 Jan 2026 14:23 EST Thu, 29 Jan 2026 14:23 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9072374 DR Erroneous Activation Notice Wed, 28 Jan 2026 13:45 EST 9072374 249788 1 DR Erroneous Activation Notice Due to an input error, the Northeast HDR Resources were incorrectly scheduled and issued Activation notices for Trade Date 01/28/2026. The error has since been corrected. Market Participants are directed to disregard the Activation notices and manage bids accordingly. Wed, 28 Jan 2026 11:30 EST Wed, 28 Jan 2026 13:45 EST Wed, 28 Jan 2026 13:45 EST Wed, 28 Jan 2026 13:45 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9060306 EMI Tue, 27 Jan 2026 15:11 EST 9060306 249787 1 EMI Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Wed, 28 Jan 2026 14:30 EST Wed, 28 Jan 2026 14:45 EST Tue, 27 Jan 2026 15:11 EST Tue, 27 Jan 2026 15:11 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9060258 Online IESO Tue, 27 Jan 2026 14:49 EST 9060258 249786 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Wed, 28 Jan 2026 14:30 EST Wed, 28 Jan 2026 14:45 EST Tue, 27 Jan 2026 14:49 EST Tue, 27 Jan 2026 14:49 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9060257 Dispatch Service Tue, 27 Jan 2026 14:49 EST 9060257 249785 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Wed, 28 Jan 2026 14:30 EST Wed, 28 Jan 2026 14:45 EST Tue, 27 Jan 2026 14:49 EST Tue, 27 Jan 2026 14:49 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9060256 IESO Reports Site Tue, 27 Jan 2026 14:48 EST 9060256 249784 1 IESO Reports Site Due to a planned IT outage, MP private/public reports could be delayed being published Wed, 28 Jan 2026 14:30 EST Wed, 28 Jan 2026 14:45 EST Tue, 27 Jan 2026 14:48 EST Tue, 27 Jan 2026 14:48 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9045573 IESO Operating Back At Primary Control Center Mon, 26 Jan 2026 05:17 EST 9045573 249736 2 IESO Operating Back At Primary Control Center The IESO (Ontario) has transferred operational control back to its Primary Control Center (PCC). Sun, 25 Jan 2026 17:45 EST Mon, 26 Jan 2026 05:17 EST Sun, 25 Jan 2026 17:52 EST Mon, 26 Jan 2026 05:17 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9034010 IESO Operating Back At Primary Control Center Sun, 25 Jan 2026 17:52 EST 9034010 249736 1 IESO Operating Back At Primary Control Center The IESO (Ontario) has transferred operational control back to its Primary Control Center (PCC). Sun, 25 Jan 2026 17:45 EST Thu, 31 Dec 2026 23:59 EST Sun, 25 Jan 2026 17:52 EST Sun, 25 Jan 2026 17:52 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9010267 Conservative Operating State Fri, 23 Jan 2026 22:38 EST 9010267 249732 1 Conservative Operating State The IESO has declared a Conservative Operating State. The IESO may take actions to recall outages or suspend switching to maintain reliability. Sat, 24 Jan 2026 00:00 EST Sat, 24 Jan 2026 10:00 EST Fri, 23 Jan 2026 22:38 EST Fri, 23 Jan 2026 22:38 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9010266 HEXX Run of Pre-Dispatch Completed Successfully Fri, 23 Jan 2026 21:28 EST 9010266 249731 1 HEXX Run of Pre-Dispatch Completed Successfully Pre-dispatch is running normally and IESO is no longer using the HE21 results. Fri, 23 Jan 2026 21:24 EST Fri, 23 Jan 2026 22:00 EST Fri, 23 Jan 2026 21:28 EST Fri, 23 Jan 2026 21:28 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9010265 HEXX Run of Pre-Dispatch Did Not Complete Fri, 23 Jan 2026 20:35 EST 9010265 249730 1 HEXX Run of Pre-Dispatch Did Not Complete Due to technical difficulties, the pre-dispatch result from HE22 is not available. IESO will use the pre-dispatch result from HE21 until this issue is resolved. We will notify you once updated pre-dispatch results are available. Fri, 23 Jan 2026 20:32 EST Fri, 23 Jan 2026 22:00 EST Fri, 23 Jan 2026 20:35 EST Fri, 23 Jan 2026 20:35 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9009956 DAM Results Delay Fri, 23 Jan 2026 12:38 EST 9009956 249719 1 DAM Results Delay DAM Results are delayed due to tool issues. Expect results by 15:30 EPT. This will also extend the day-ahead market restricted window until valid results are published. Fri, 23 Jan 2026 12:35 EST Fri, 23 Jan 2026 15:30 EST Fri, 23 Jan 2026 12:38 EST Fri, 23 Jan 2026 12:38 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8998005 Dispatch Service Fri, 23 Jan 2026 00:24 EST 8998005 249718 1 Dispatch Service The IESO's dispatch service issues appear to be resolved. However, market participants are encouraged to contact the IESO if issues persist and attempts to reconnect are unsuccessful. Fri, 23 Jan 2026 00:20 EST Fri, 23 Jan 2026 06:00 EST Fri, 23 Jan 2026 00:24 EST Fri, 23 Jan 2026 00:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8998004 Dispatch Service Thu, 22 Jan 2026 22:23 EST 8998004 249717 1 Dispatch Service The IESO is experiencing intermittent dispatch issues. Automated dispatch instructions sent via Dispatch Service may be unavailable. The IESO will manually dispatch by phone as necessary. Once the outage is complete, users may need to reverify and log in. Thu, 22 Jan 2026 20:00 EST Thu, 22 Jan 2026 23:30 EST Thu, 22 Jan 2026 22:23 EST Thu, 22 Jan 2026 22:23 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9010268 Advanced Notice of Conservative Operations Fri, 23 Jan 2026 22:53 EST 9010268 249706 3 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sun, 25 Jan 2026 00:00 EST Mon, 26 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Fri, 23 Jan 2026 22:53 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973392 Advanced Notice of Conservative Operations Wed, 21 Jan 2026 11:23 EST 8973392 249706 1 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sat, 24 Jan 2026 00:00 EST Sat, 24 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Wed, 21 Jan 2026 11:23 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9009968 Advanced Notice of Conservative Operations Fri, 23 Jan 2026 13:10 EST 9009968 249706 2 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Sat, 24 Jan 2026 00:00 EST Mon, 26 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Fri, 23 Jan 2026 13:10 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9084860 Advanced Notice of Conservative Operations Thu, 29 Jan 2026 22:40 EST 9084860 249706 9 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Tue, 27 Jan 2026 00:00 EST Thu, 29 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Thu, 29 Jan 2026 22:40 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9060021 Advanced Notice of Conservative Operations Tue, 27 Jan 2026 11:17 EST 9060021 249706 8 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Tue, 27 Jan 2026 00:00 EST Fri, 30 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Tue, 27 Jan 2026 11:17 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9034009 Advanced Notice of Conservative Operations Sun, 25 Jan 2026 11:03 EST 9034009 249706 5 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Mon, 26 Jan 2026 00:00 EST Tue, 27 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Sun, 25 Jan 2026 11:03 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9034013 Advanced Notice of Conservative Operations Mon, 26 Jan 2026 01:00 EST 9034013 249706 6 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Tue, 27 Jan 2026 00:00 EST Tue, 27 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Mon, 26 Jan 2026 01:00 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9033993 Advanced Notice of Conservative Operations Sun, 25 Jan 2026 02:30 EST 9033993 249706 4 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Mon, 26 Jan 2026 00:00 EST Mon, 26 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Sun, 25 Jan 2026 02:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=9045869 Advanced Notice of Conservative Operations Mon, 26 Jan 2026 13:18 EST 9045869 249706 7 Advanced Notice of Conservative Operations Advanced Notice of Conservative Operations for forecasted extreme cold temperatures and adverse conditions. The IESO will take actions as required to maintain reliability, such as committing additional generation, rejecting or revoking planned outages, or other actions appropriate for the circumstance. Tue, 27 Jan 2026 00:00 EST Wed, 28 Jan 2026 23:59 EST Wed, 21 Jan 2026 11:23 EST Mon, 26 Jan 2026 13:18 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973324 Generation Biasing Wed, 21 Jan 2026 08:55 EST 8973324 249702 1 Generation Biasing Generation biasing may be required to facilitate planned switching on circuit B1S (Barrett Chute x Ardoch) Sun, 25 Jan 2026 08:00 EST Fri, 06 Feb 2026 16:00 EST Wed, 21 Jan 2026 08:55 EST Wed, 21 Jan 2026 08:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973594 Generation Biasing Wed, 21 Jan 2026 14:19 EST 8973594 249702 2 Generation Biasing Generation biasing may be required to facilitate planned switching on circuit B1S (Barrett Chute x Ardoch) Sun, 25 Jan 2026 08:00 EST Sun, 25 Jan 2026 08:15 EST Wed, 21 Jan 2026 08:55 EST Wed, 21 Jan 2026 14:19 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973162 Online IESO Wed, 21 Jan 2026 06:45 EST 8973162 249701 1 Online IESO Due to planned outage Online IESO will not be available. This includes the following applications: Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns Meter Trouble Report (MTR) - Manage the process related to correcting revenue meter errors Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests Prudential System - Submit Prudential Support Information Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer Reliability Compliance Tool - Manage the process of collecting submittals from participants related to NERC reliability standards Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions Online Settlement Forms - Collect market participant data required to settle the market Audit Revenue Metering Installation – Add, delete, or modify existing findings, actions, and finding classifications DR Metering Audit – Submit Demand Response metering audit Manage Contributor – Manage Demand Response Contributor Registry information Non-Compliance Report – Self-report possible breaches of the market rules CDM Plan and Measures - Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans Retrofit - Manage Conservation Retrofit program and Restful API to interact with Retrofit program Industrial Energy Efficiency Program (IEEP) - Support customers across Ontario in improving their industrial processes and implementing system optimization projects Beacon – Manage the process with external suppliers related to FIT and microFIT contract management Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Thu, 22 Jan 2026 20:00 EST Thu, 22 Jan 2026 22:00 EST Wed, 21 Jan 2026 06:45 EST Wed, 21 Jan 2026 06:45 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973163 Geomagnetic Disturbance Wed, 21 Jan 2026 06:45 EST 8973163 249700 2 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Wed, 21 Jan 2026 02:00 EST Wed, 21 Jan 2026 13:00 EST Wed, 21 Jan 2026 02:36 EST Wed, 21 Jan 2026 06:45 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973323 Geomagnetic Disturbance Wed, 21 Jan 2026 08:55 EST 8973323 249700 3 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Wed, 21 Jan 2026 02:00 EST Wed, 21 Jan 2026 08:55 EST Wed, 21 Jan 2026 02:36 EST Wed, 21 Jan 2026 08:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973146 Geomagnetic Disturbance Wed, 21 Jan 2026 02:36 EST 8973146 249700 1 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Wed, 21 Jan 2026 02:00 EST Wed, 21 Jan 2026 09:00 EST Wed, 21 Jan 2026 02:36 EST Wed, 21 Jan 2026 02:36 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8961047 Sandbox Online IESO Tue, 20 Jan 2026 12:55 EST 8961047 249674 1 Sandbox Online IESO Due to planned outage Sandbox Online IESO will not be available. This includes the following actions: -Registration Automation System – Manage organization registration and participant authorization, Facility registration and Meter Installation processes. -Notice of Disagreement (NOD) – Manage the process with participants related to settlement and invoicing concerns. -Meter Trouble Report (MTR) – Manages the process related to correcting revenue meter errors. -Meter Data Management (MDM) – Manage meter data report profiles and submit ad-hoc meter data requests. -Prudential System – Submit Prudential Support Information. -Capacity Auction – Submit Capacity Qualification and Demand Response Auction Offer. -Reliability Compliance Tool – Manage the process of collecting submittals from participants related to NERC reliability standards. -Enable Capacity Export – Give the market participant the ability to sell excess capacity to neighboring jurisdictions. -Online Settlement Forms – Collect market participant data required to settle the market. -CDM Plan and Measures – Used by LDCs and IESO to collaborate on changes to the LDC CDM Plans. -Retrofit – Manage Conservation Retrofit program and Restful API to interact with Retrofit program. -Transmission Rights Auction (TRA) – Manage auctions and allow market participants to submit bids in the TR market. -Market Power Mitigation (MPM) – Manage registered reference levels and reference quantities, and submit temporary reference level change requests Wed, 21 Jan 2026 18:00 EST Wed, 21 Jan 2026 20:00 EST Tue, 20 Jan 2026 12:55 EST Tue, 20 Jan 2026 12:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8961036 Market Tool Outage - OMB Tue, 20 Jan 2026 12:39 EST 8961036 249673 1 Market Tool Outage - OMB 13:15 - 13:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 13:15 - 13:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 13:15 - 13:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 13:15 - 13:45 EDT UCM: Commitment notifications will not be issued. 14:00 - 14:10 EDT IESO Reports Site: The Adequacy report will not be published. 14:00 - 15:00 EDT IESO Reports Site: The Predispatch report will not be published. Wed, 21 Jan 2026 13:15 EST Wed, 21 Jan 2026 15:00 EST Tue, 20 Jan 2026 12:39 EST Tue, 20 Jan 2026 12:39 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8973476 Market Tool Outage - OMB Wed, 21 Jan 2026 13:05 EST 8973476 249673 2 Market Tool Outage - OMB 14:15 - 14:45 EDT Dispatch Service: Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). 14:15 - 14:45 EDT ICCP: The Inter-Control Center Communication Protocol (ICCP) link to IESO will be unavailable. 14:15 - 14:45 EDT IESO Reports Site: Confidential Report publication will be delayed. Public Report publication will be delayed. 14:15 - 14:45 EDT UCM: Commitment notifications will not be issued. 15:00 - 15:10 EDT IESO Reports Site: The Adequacy report will not be published. 15:00 - 16:00 EDT IESO Reports Site: The Predispatch report will not be published. Wed, 21 Jan 2026 14:15 EST Wed, 21 Jan 2026 16:00 EST Tue, 20 Jan 2026 12:39 EST Wed, 21 Jan 2026 13:05 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8961577 Geomagnetic Disturbance Tue, 20 Jan 2026 17:04 EST 8961577 249664 2 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Tue, 20 Jan 2026 10:32 EST Tue, 20 Jan 2026 21:00 EST Tue, 20 Jan 2026 10:33 EST Tue, 20 Jan 2026 17:04 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8960718 Geomagnetic Disturbance Tue, 20 Jan 2026 10:33 EST 8960718 249664 1 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Tue, 20 Jan 2026 10:32 EST Tue, 20 Jan 2026 23:59 EST Tue, 20 Jan 2026 10:33 EST Tue, 20 Jan 2026 10:33 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8961578 Geomagnetic Disturbance Tue, 20 Jan 2026 20:35 EST 8961578 249664 3 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Tue, 20 Jan 2026 10:32 EST Wed, 21 Jan 2026 02:00 EST Tue, 20 Jan 2026 10:33 EST Tue, 20 Jan 2026 20:35 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8960312 Geomagnetic Disturbance Tue, 20 Jan 2026 02:55 EST 8960312 249645 3 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Mon, 19 Jan 2026 14:46 EST Tue, 20 Jan 2026 09:00 EST Mon, 19 Jan 2026 14:50 EST Tue, 20 Jan 2026 02:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8960311 Geomagnetic Disturbance Tue, 20 Jan 2026 02:32 EST 8960311 249645 2 Geomagnetic Disturbance A geomagnetic storm warning of Kp7 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Mon, 19 Jan 2026 14:46 EST Tue, 20 Jan 2026 10:00 EST Mon, 19 Jan 2026 14:50 EST Tue, 20 Jan 2026 02:32 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8960321 Geomagnetic Disturbance Tue, 20 Jan 2026 05:57 EST 8960321 249645 4 Geomagnetic Disturbance A geomagnetic storm warning of Kp8 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Mon, 19 Jan 2026 14:46 EST Tue, 20 Jan 2026 09:00 EST Mon, 19 Jan 2026 14:50 EST Tue, 20 Jan 2026 05:57 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8948546 Geomagnetic Disturbance Mon, 19 Jan 2026 14:50 EST 8948546 249645 1 Geomagnetic Disturbance A geomagnetic storm warning of Kp9 has been issued. Market Participants are reminded to notify the IESO of abnormal behavior such as voltage fluctuations, reactive power swings, or negative sequence alarms. Mon, 19 Jan 2026 14:46 EST Tue, 20 Jan 2026 10:00 EST Mon, 19 Jan 2026 14:50 EST Mon, 19 Jan 2026 14:50 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8948512 DR Erroneous Standby Notice Mon, 19 Jan 2026 13:44 EST 8948512 249644 1 DR Erroneous Standby Notice Due to an input error, a Niagara HDR Resource and Toronto HDR Resource were incorrectly scheduled and issued Standby notices for Trade Date 01/20/2026. Capacity market participants are directed to disregard the Standby Notices and manage bids accordingly. Mon, 19 Jan 2026 13:42 EST Tue, 20 Jan 2026 23:59 EST Mon, 19 Jan 2026 13:44 EST Mon, 19 Jan 2026 13:44 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8936029 Flexibility Event Forecasted Sun, 18 Jan 2026 07:15 EST 8936029 249634 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Mon, 19 Jan 2026 11:00 EST Mon, 19 Jan 2026 21:00 EST Sun, 18 Jan 2026 07:15 EST Sun, 18 Jan 2026 07:15 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8876942 5-minute Wind Forecast Disabled Wed, 14 Jan 2026 12:55 EST 8876942 249377 1 5-minute Wind Forecast Disabled Wind output is approximately 400 MW under forecast. The 5-minute variable generation forecast has been disabled as of 12:45. Wed, 14 Jan 2026 12:45 EST Thu, 15 Jan 2026 00:00 EST Wed, 14 Jan 2026 12:55 EST Wed, 14 Jan 2026 12:55 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8877023 5-minute Wind Forecast Disabled Wed, 14 Jan 2026 14:21 EST 8877023 249377 2 5-minute Wind Forecast Disabled Wind output is approximately 400 MW under forecast. The 5-minute variable generation forecast has been disabled as of 12:45. Wed, 14 Jan 2026 12:45 EST Wed, 14 Jan 2026 14:20 EST Wed, 14 Jan 2026 12:55 EST Wed, 14 Jan 2026 14:21 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8876217 Dispatch Service Wed, 14 Jan 2026 06:45 EST 8876217 249362 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 15 Jan 2026 10:50 EST Thu, 15 Jan 2026 11:00 EST Wed, 14 Jan 2026 06:45 EST Wed, 14 Jan 2026 06:45 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8876216 Dispatch Service Wed, 14 Jan 2026 06:43 EST 8876216 249361 1 Dispatch Service Automated dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as necessary. The Dispatch Service Web UI users may get disconnected and will need to login and verify connected after the outage. Users may get disconnected and will need to login and verify access (MP action may be required). Thu, 15 Jan 2026 09:20 EST Thu, 15 Jan 2026 09:30 EST Wed, 14 Jan 2026 06:43 EST Wed, 14 Jan 2026 06:43 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8851677 Market Tools Planned Maintenance Mon, 12 Jan 2026 08:05 EST 8851677 249325 1 Market Tools Planned Maintenance Due to planned maintenance, automated dispatch instructions will be unavailable. It is possible that at least 2 MIO runs (5 minute dispatches) may be missed. The IESO will manually dispatch by phone as required. Tue, 13 Jan 2026 15:30 EST Tue, 13 Jan 2026 15:45 EST Mon, 12 Jan 2026 08:05 EST Mon, 12 Jan 2026 08:05 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8864280 Market Tools Planned Maintenance Tue, 13 Jan 2026 03:24 EST 8864280 249325 2 Market Tools Planned Maintenance Due to planned maintenance, automated dispatch instructions will be unavailable. It is possible that at least 2 MIO runs (5 minute dispatches) may be missed. The IESO will manually dispatch by phone as required. Tue, 13 Jan 2026 15:30 EST Tue, 13 Jan 2026 03:24 EST Mon, 12 Jan 2026 08:05 EST Tue, 13 Jan 2026 03:24 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8851672 Flexibility Event Forecasted Mon, 12 Jan 2026 07:56 EST 8851672 249324 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Tue, 13 Jan 2026 10:00 EST Tue, 13 Jan 2026 19:00 EST Mon, 12 Jan 2026 07:56 EST Mon, 12 Jan 2026 07:56 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8804576 Energy Market Interface (EMI) will be unavailable. Thu, 08 Jan 2026 14:05 EST 8804576 249304 1 Energy Market Interface (EMI) will be unavailable. EMI is the Web UI component of the Market Information Management (MIM) solution used to submit dispatch data. Users may get disconnected and will need to login and verify access eMIM API will be unavailable. eMIM is the MIM Application Programming Interface used to submit dispatch data. Users may get disconnected and will need to login and verify access. Mon, 12 Jan 2026 13:30 EST Mon, 12 Jan 2026 13:50 EST Thu, 08 Jan 2026 14:05 EST Thu, 08 Jan 2026 14:05 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8803806 Flexibility Event Forecasted Thu, 08 Jan 2026 07:02 EST 8803806 249297 1 Flexibility Event Forecasted The IESO will increase the 30-minute operating reserve requirement by 200 MW for a forecasted flexibility event. Additional actions may be taken as required. Fri, 09 Jan 2026 01:00 EST Fri, 09 Jan 2026 15:00 EST Thu, 08 Jan 2026 07:02 EST Thu, 08 Jan 2026 07:02 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8779637 Generation Biasing Wed, 07 Jan 2026 07:55 EST 8779637 249286 1 Generation Biasing Generation biasing may be required to facilitate planned switching on B6M. Sun, 11 Jan 2026 07:00 EST Sun, 11 Jan 2026 07:15 EST Wed, 07 Jan 2026 07:55 EST Wed, 07 Jan 2026 07:55 EST Alert http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8754353 5-minute Wind Forecast Disabled Mon, 05 Jan 2026 13:37 EST 8754353 248970 1 5-minute Wind Forecast Disabled Wind output is approximately 400 MW under forecast. The 5-minute variable generation forecast has been disabled as of 13:35. Mon, 05 Jan 2026 13:35 EST Mon, 05 Jan 2026 16:00 EST Mon, 05 Jan 2026 13:37 EST Mon, 05 Jan 2026 13:37 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8742524 Market Tool Outage Sun, 04 Jan 2026 14:16 EST 8742524 248964 1 Market Tool Outage Pre-dispatch is running normally and IESO is no longer using the 12:02 results. Sun, 04 Jan 2026 14:15 EST Sun, 04 Jan 2026 16:00 EST Sun, 04 Jan 2026 14:16 EST Sun, 04 Jan 2026 14:16 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8742523 Market Tool Outage Sun, 04 Jan 2026 13:30 EST 8742523 248963 1 Market Tool Outage Be advised that the 13:02 run of Pre Dispatch did not complete. Please use the 12:02 Pre Dispatch results. Staff are investigating. Sun, 04 Jan 2026 13:00 EST Sun, 04 Jan 2026 23:59 EST Sun, 04 Jan 2026 13:30 EST Sun, 04 Jan 2026 13:30 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8742525 Market Tool Outage Sun, 04 Jan 2026 14:16 EST 8742525 248963 2 Market Tool Outage Be advised that the 13:02 run of Pre Dispatch did not complete. Please use the 12:02 Pre Dispatch results. Staff are investigating. Sun, 04 Jan 2026 13:00 EST Sun, 04 Jan 2026 14:16 EST Sun, 04 Jan 2026 13:30 EST Sun, 04 Jan 2026 14:16 EST Action http://www.ieso.ca/sector-participants/rss-feeds/advisory-notices-archive/advisory-notice?cid=9678B1BA-04EC-42C4-BC24-C9C1CFF06C18&rid=8440830 Unit Readiness Program Wed, 10 Dec 2025 06:25 EST 8440830 248578 1 Unit Readiness Program Please be advised that the Unit Readiness Program may be enacted for 2025/12/11 to 2026/02/28. The IESO will contact individual generators at least three (3) business days in advance of any exercise. Thu, 11 Dec 2025 00:00 EST Sat, 28 Feb 2026 23:59 EST Wed, 10 Dec 2025 06:25 EST Wed, 10 Dec 2025 06:25 EST Alert