CAISO's revised plan for a WEIM extended day-ahead market makes changes to transmission requirements and penalties for failing resource sufficiency evaluations.

The Governing Body of CAISO's Western Energy Imbalance Market welcomed a new member and elected its chair and vice chair for the next year.

The Northwest stands out as an exception to the increasingly dire water situation gripping the wider West, boding well for its summer hydropower potential.

The Bonneville Power Administration experienced two major “price excursion” events in the Western EIM within two weeks of joining the market.

The CREPC-WIRAB spring meeting focused on regional markets and transmission planning in the West, including FERC's recent transmission planning NOPR.

The Western EIM took on BPA and Tucson Electric Power as new participants, marking the market’s largest single expansion since its founding.

CAISO's Western Energy Imbalance Market surpassed $2 billion in total member benefits only 20 months after hitting the $1 billion mark in 2020.

The Bonneville Power Administration is on target to enter the Western EIM in early May after executives made a final determination on its market readiness.

SPP said it plans to close its Western Energy Imbalance Service, with members joining either its proposed Markets+ program or its Western RTO.

A CAISO market report says high natural gas prices drove a 50% run-up in electricity costs in Q4 2021, hitting the Western Energy Imbalance Market as well.