The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. February runoff in the Basin above Sioux City was one million acre-feet, 91 percent of the average.
“Runoff in the reservoir system was slightly below average for February, and the conditions across most of the basin remain dry,” said John Remus of the Army Corps of Engineers. “Mountain snowpack improved in February but is still below average, while the Plains snowpack, which was already below average, has mostly melted.”
As a result, Remus says they are forecasting a below-average runoff year for the basin. The 2025 calendar year runoff forecast above Sioux City is 22.1 million acre-feet, 86 percent of the average.
The volume of water stored in the Missouri River Mainstem Reservoir System is at 50.4 million acre-feet, 5.7 million below the top of the carryover multiple-use zone.
NAFB news service
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