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Latest notices

Title	Topics	Posted
BPM change management: Proposed revision requests and updated BPMs posted as of 12/23/2025	Legal and regulatory	12/23/2025, 9:59 AM
Storage Design and Modeling: Comment template posted, comments due 01/08/26	Markets	12/19/2025, 9:45 AM
2027 Flexible capacity needs assessment process: Data submission deadline 01/15/26	Markets, Planning	12/19/2025, 9:31 AM
Tariff Revisions: Extended Day-Ahead Market (EDAM) and Day-Ahead Market Enhancements (DAME) updated tariff matrix	Legal and regulatory, Markets, Information Technology	12/18/2025, 11:29 AM
WEM Governing Body, Joint, and ISO Board of Governors meetings on 12/16/25-12/18/25; revised final agendas posted	Governance and committees	12/15/2025, 9:57 AM
Final 2026–2028 Policy Roadmap Published	Legal and regulatory, Markets, Operations, Planning, Information Technology	12/15/2025, 9:56 AM
WEM Governing Body, Joint, ISO Board of Governors, and Committee meetings on 12/16/25-12/18/25; final agendas posted	Governance and committees	12/12/2025, 10:29 AM
Storage Design and Modeling: Updated Discussion and Issue Paper on Uplift and Default Energy Bid posted, comments due 01/08/26	Markets	12/12/2025, 10:22 AM
Congestion Revenue Rights Enhancements Issue Paper posted	Markets	12/12/2025, 8:42 AM
Day-Ahead Market Enhancements: Configurable Parameters Implementation working group on 12/18/25	Markets	12/11/2025, 10:40 AM
WEM Governing Body, Joint, ISO Board of Governors, and Committee meetings on 12/16/25-12/18/25; draft agendas to be posted	Governance and committees	12/09/2025, 10:24 AM
Market Surveillance Committee teleconference meeting on 12/12/25; Final Agenda posted; Draft Opinion to be posted	Governance and committees	12/08/2025, 10:32 AM
Extended Day-ahead Market (EDAM) Implementation: Intertie Schedule Modeling Workshop on 12/15/25	Markets	12/08/2025, 9:42 AM
Extended Day-Ahead Market Congestion Revenue Allocation Phase 2: Working Group on 12/11/25	Markets	12/04/2025, 9:51 AM
Day-Ahead Market Enhancements Configurable Parameters Implementation working group: Comment Template Deadline Extended to 12/10/25	Markets	12/03/2025, 9:43 AM
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Latest news

Title	Topics	Posted
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
Turlock Irrigation District commits to joining Extended Day-Ahead Market	Western Energy Markets	05/19/2025, 9:59 AM
Western Energy Imbalance Market approaches new milestone	Western Energy Markets	04/30/2025, 10:00 AM
WEIM cumulative benefits approach $7 billion	Western Energy Markets	01/30/2025, 12:00 AM
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