Tacoma Power used Upstream Tech's HydroForecast powered by NASA satellite data to maintain reservoir levels and manage hydroelectric operations during a record snow drought.

Key Details

• Following a warm winter with heavy rainfall and minimal mountain snowpack, Washington state declared a drought emergency across all watersheds on April 8, 2026.
• Tacoma Power used HydroForecast short-term and seasonal models to preserve water behind Mayfield and Mossyrock dams, entering summer 2026 with near-average reservoir storage.

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