The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average.
The U.S. Army Corps of Engineers says March runoff in the upper Missouri River Basin was 76% of average. The 2025 calendar year runoff forecast above Sioux City is 85% of average. The runoff forecast is based on current soil moisture conditions, plains snowpack, mountain snowpack and long-term precipitation and temperature outlooks.
The six mainstem power plants generated 610-million kilowatt hours (kWh) of electricity in March, lower than the typical energy generation for the month of 636-million kWh. Forecast power generation for 2025 is 8.9-billion kWh, compared to the long-term average of 9.4 billion kWh.
To view the detailed three-week release forecast for the mainstem dams, go to http://go.usa.gov/xVgWr.
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