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. Mountain snow normally peaks near April 17. [Defense Visual Information Distribution Service]


Capacity above Sioux City is 75%; hydropower generation is down over 20% at the six mainstem power plants.
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