Missouri River Basin Water Management - Call - 06/05/2025
The June 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. “Heavy rainfall in western and central North Dakota and South Dakota during May supplemented the mountain snowmelt runoff,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division.
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22:49
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22:49
Missouri River Basin Water Management - Call - 05/06/2025
The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. April runoff in the Missouri River Basin above Sioux City was 1.4 million acre-feet, 48% of average.
“Runoff into the reservoir system was below average for the month of April, and runoff was below average in all reaches,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division. “Drought or abnormally dry conditions are currently present in 75% of the basin, and conditions have worsened in the Fort Peck reach and parts of the Garrison reach in the last month. As a result, the runoff forecast was lowered by 1.9 MAF from last month.”
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24:57
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Missouri River Basin Water Management - Call - 03/06/2025
The 2025 calendar year runoff forecast above Sioux City is 22.1 MAF, 86% of average. The runoff forecast is based on current soil moisture conditions, plains snowpack, mountain snowpack, and long-term precipitation and temperature outlooks. Average is 25.7 MAF. The March 3 mountain snowpack in the Fort Peck reach was 89% of average, while the mountain snowpack in the Fort Peck to Garrison reach was 91% of average. By March 1, about 79% of the total mountain snowfall has typically accumulated. Mountain snow normally peaks near April 17.
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Missouri River Basin Water Management - Call - 02/06/2025
The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. January runoff in the Missouri River Basin above Sioux City was 0.7 million acre-feet, 92% of average. Runoff was near or below average for most of the Missouri River Basin, and most of the upper basin had below-normal precipitation.
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Missouri River Basin Water Management - Call - 01/08/2025
For the 2024 calendar year, Missouri River basin runoff above Sioux City, Iowa totaled 23.3 million acre-feet, 91% of average.
Dry conditions continue to affect the upper Missouri River Basin at the start of the 2025 calendar year, so the U.S. Army Corps of Engineers is forecasting below-average runoff into the mainstem reservoir system. For 2025, runoff in the Missouri River basin above Sioux City, Iowa is forecast to be 20.2 MAF, 79% of average.
Following historic flooding in the Missouri River Basin during 2011, the U.S. Army Corps of Engineers, Northwestern Division committed to providing more frequent communications with stakeholders in the basin. The Corps aims to keep the basin informed about reservoir operations, current and forecast weather conditions and reservoir release plans. Congressional delegation members and/or representatives, Tribes, state governments, county and local officials and the media participate on each call.
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