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Latest notices

Title Topics Posted
Forecasting Forum Q4 meeting on 11/3/26 Markets
2027 Default Resource Adequacy Values: Default Qualifying Capacity and Planning Reserve Margin Development update Markets
Extended Day-Ahead Market Congestion Revenue Allocation Phase 2: Working group meeting on 11/9/26 Markets
Market Performance and Planning Forum on 10/26/26: EDAM Report posted, comments due 11/12/26 Markets
Greenhouse Gas Readiness: Pre-Market Simulation Training session on 11/2/2026 Markets
Maintenance scheduled for California ISO websites and reporting services on 10/22/26 and 10/29/26 Information Technology
Western Energy Markets Regional Issues Forum: Independent Power Producers and Marketers sector liaison search statement of interest deadline on 11/10/26 Markets, Governance and committees
Gas Resource Management: Draft Tariff Language for After-the-Fact Cost Recovery for Natural Gas Resources, meeting on 10/27/26 Markets
Business Practice Manual Change Management meeting on 10/27/26 Legal and regulatory
FERC Order No. 881 Implementation Discussions with RC West TOP: Meeting on 10/26/26 Legal and regulatory, Markets
WEM Governing Body and Joint meetings on 10/20-21/26, final agendas posted Governance and committees
DAME Transitional Measures and Overlapping Capacity Training Session on 10/22/26 Markets
WEM Governing Body and Joint meetings on 10/20-21/26; and WEM Governing Body, ISO Board of Governors, and Committee meetings on 10/26-29/26: Draft agendas posted Governance and committees
Save the Date: Market Performance and Planning Forum on 10/26/26 Markets, Operations, Information Technology
Reminder: Registration for Joint Market Seams workshop on 10/22/26; agenda posted Markets
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Latest news

Title Topics Posted
Cost savings for participants in both markets continue to grow Western Energy Markets, Markets, Extended Day-Ahead Market 10/29/2026, 10:30 AM
Extended Day-Ahead Market Expanded to include Portland General Electric Western Energy Markets, Markets, Extended Day-Ahead Market 10/01/2026, 8:55 AM
NV Energy signs agreement to join Extended Day-Ahead Market Western Energy Markets, Extended Day-Ahead Market 09/17/2026, 9:55 AM
BHE Montana becomes eighth utility to commit to the Extended Day-Ahead Market Western Energy Markets, Markets, Extended Day-Ahead Market 08/10/2026, 9:55 AM
Western Energy Markets Quarterly Benefits Report debuts with first Extended Day-Ahead Market results Western Energy Markets, Extended Day-Ahead Market 07/30/2026, 9:00 AM
Anita Decker reappointed to Western Energy Markets Governing Body Western Energy Markets 06/17/2026, 1:45 AM
ISO Board of Governors approves 2025-2026 transmission plan Transmission 05/19/2026, 12:15 AM
Black Hills Corp.’s South Dakota and Wyoming electric utility subsidiaries join Western Energy Imbalance Market Western Energy Markets 05/06/2026, 12:15 AM
BHE Montana joins the Western Energy Imbalance Market Western Energy Markets 05/06/2026, 12:00 AM
EDAM is live: PacifiCorp and CAISO successfully launch new market May 1 Western Energy Markets 05/01/2026, 12:15 AM
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