WEIM Intermountain West Exports Increase 780% in Q4 2025

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California's Imports Increase Significantly, CAISO DMM Finds

This bar graph shows the change in average hourly generation by fuel type in Q4 2025 vs. Q4 2024 in the Intermountain West region. | CAISO DMM

Apr 5, 2026 | David Krause

The Western Energy Imbalance Market’s Intermountain West region saw its hourly exports increase by an average of 780% — or 680 MW — in Q4 2025 versus the same period a year earlier.

Energy Market Western Energy Imbalance Market (WEIM)

KeywordsCAISO Department of Market Monitoring (DMM)California Independent System Operator (CAISO)capacity imports/exports coal Intermountain West market per solar Western Energy Imbalance Market (WEIM)wind

David Krause

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