https://iesoqa-public.sharepoint.com/Pages/News/Day_0_Advisory_Notices_Summary.aspx IESO Day 0 System Advisory Messages Tue, 05 May 2026 11:16 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/day-0-advisory-notices-summary/advisory-notice?cid=EEF58844-7339-471B-BB36-A1050ED923AF&rid=10323528 5-minute Wind Forecast Disabled Tue, 05 May 2026 11:16 EST 10323528 254414 1 5-minute Wind Forecast Disabled The 5-minute variable generation forecast has been disabled. Tue, 05 May 2026 11:14 EST Tue, 05 May 2026 13:15 EST Tue, 05 May 2026 11:16 EST Tue, 05 May 2026 11:16 EST Action http://www.ieso.ca/sector-participants/rss-feeds/day-0-advisory-notices-summary/advisory-notice?cid=EEF58844-7339-471B-BB36-A1050ED923AF&rid=10323527 Market Tool Outage Tue, 05 May 2026 11:09 EST 10323527 254343 3 Market Tool Outage The following market participant tools or services will not be available due to planned outage: 1) Automated electronic dispatch instructions sent via Dispatch Service will be unavailable. The IESO will manually dispatch by phone as required. Dispatch Service Web User Interface users will need to login and verify their connection after the completion of this outage. 2) Access to Online IESO 3) Access to EMI 4) Predispatch report may not be generated for 14:00. In the event it does not, please use the 13:00 Predispatch report. Tue, 05 May 2026 13:25 EST Tue, 05 May 2026 13:55 EST Tue, 05 May 2026 01:59 EST Tue, 05 May 2026 11:09 EST Action