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February 28, 2022


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Department of Market Monitoring WEIM Resource Sufficiency Report for January 2022, Data Release Call: 3/8/22


The California ISO Department of Market Monitoring (DMM) has posted the Western Energy Imbalance Market (WEIM) Resource Sufficiency Evaluation Issues and Performance Report covering January 2022. DMM is providing additional transparency surrounding test accuracy and performance in regular reports specific to this topic as part of the WEIM resource sufficiency evaluation enhancements stakeholder initiative. This report includes an extended section estimating the impact of proposed changes to the evaluation, recently approved by the WEIM Governing Body and the California ISO Board of Governors.


A stakeholder web conference is scheduled on March 8, 2022 to discuss the analysis and findings of the January report.


DMM continues to seek feedback from stakeholders on existing or additional metrics and analysis that would be most valuable. Please provide feedback directly to DMM at, or through the California ISO’s WEIM Resource Sufficiency Evaluation Enhancements stakeholder process webpage.


The supporting data at the following links are available on the Market Monitoring Reports and Presentations webpage:


After reviewing comments submitted in the California ISO’s WEIM Resource Sufficiency Evaluation Enhancements stakeholder initiative, the California ISO approved release of this data. The California ISO does not warrant the accuracy or completeness of this data. The data cannot be republished without the prior written consent of the California ISO.


Information related to market monitoring is available on the Market Monitoring webpage.


Meeting Details

Date: March 8, 2022

Time: 11 a.m. – 12 p.m. Pacific Time

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Participation Information

Step 1: join web conference

Step 2: connect to audio by selecting “computer audio” or select “call me” and enter your phone number


Audio only participation

Call 1-888-251-2949 or 215-861-0694, access code: 5146121#


Technical support

Call AT&T Help Desk at 1-301-250-7202



Kyle Westendorf at or Department of Market Monitoring (916) 351-2174


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