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Latest notices

Title Topics Posted
Business Practice Manual Change Management calls on 2/24/26 - 2/26/26 Legal and regulatory
Financial Planning Initiatives (including Start-up Funding for the Regional Organization for Western Energy): Draft final proposal posted; call on 3/19/26 Legal and regulatory, Markets, Operations
Scheduling Infrastructure and Business Rules Advanced Bid Submission and Validation Training on 3/19/26 Markets
Intertie Schedule Modeling Evolution on CAISO Interties: Workshop on 3/18/26 Markets
Storage Design and Modeling: Issue Paper and Straw Proposal on Mixed-Fuel and Distribution-Level Resources posted; meeting on 3/16/26 Markets
Notice of new market participant as of 3/4/26 Markets
Annual Interregional Coordination meeting on 3/26/26: Agenda posted Planning
Daylight Saving Time Transition 3/8/26 Markets, Operations, Information Technology
Scheduling Infrastructure and Business Rules Fundamentals Training on 3/10/26 Markets
Western Energy Markets Regional Issues Forum on 3/16/26: Agenda posted; registration requested Markets, Governance and committees
BPM change management: Proposed revision requests and updated BPMs posted as of 3/3/26 Legal and regulatory
Large Loads Initiative: Technical Requirements Working Group call on 3/10/26 Planning
WEM Governing Body, Joint, ISO Board of Governors, and Department of Market Monitoring Committee meetings on 3/3/26 – 3/5/26: Final agendas posted Governance and committees
Market Surveillance Committee General Session meeting on 3/6/26: Final Agenda posted Governance and committees
Demand and Distributed Energy Market Integration meeting on 3/13/26 Markets
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Latest news

Title Topics Posted
Western Energy Imbalance Market Surpasses $8 Billion in Total Benefits Since Inception Western Energy Markets 02/13/2026, 12:00 AM
CAISO submits first Assembly Bill 825 report to Legislature and Governor Western Energy Markets 02/02/2026, 11:20 AM
Western Energy Imbalance Market Surpasses $7.82 Billion in Total Benefits Western Energy Markets 10/30/2025, 10:45 AM
WEIM Posts Strong Q2, Surpassing $7.4 Billion in Total Benefits Western Energy Markets 07/31/2025, 12:00 AM
WEM Governing Body approves important market reliability feature Western Energy Markets 07/23/2025, 1:20 PM
Public Service Company of New Mexico commits to join the Extended Day-Ahead Market Western Energy Markets 07/01/2025, 9:25 AM
Deborah Smith, former Seattle City Light CEO, added to Western Energy Markets Governing Body Western Energy Markets 06/18/2025, 3:17 PM
Imperial Irrigation District to join both ISO-operated electricity markets Western Energy Markets 05/27/2025, 10:00 AM
ISO Board of Governors approves 2024-2025 transmission plan Transmission 05/22/2025, 12:00 AM
Turlock Irrigation District commits to joining Extended Day-Ahead Market Western Energy Markets 05/19/2025, 9:59 AM
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