Runoff in the Missouri River Basin above Sioux City during April 2025 was 48% of average (1.4 million acre-feet), putting the 2025 calendar year runoff forecast above Sioux City at 78% of average (20 MAF).
John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division, says drought or abnormally dry conditions are currently present in 75% of the basin. He says conditions have worsened in Montana and North Dakota and as a result, the runoff forecast was lowered by 1.9 MAF from last month. The runoff forecast is based on current soil moisture conditions, mountain snowpack, and long-term precipitation and temperature outlooks.
The six mainstem power plants generated 727 million kWh of electricity last month, an increase from the typical April average of 695 million kWh. Forecast generation for 2025 is 8.6 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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