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  • Upper basin runoff forecast improves with spring precipitation

    The latest 2023 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa is showing improvement. The 2023 calendar year runoff forecast above Sioux City is 26.4 million acre-feet (MAF), 103% of average. The runoff forecast is based on current soil moisture conditions, plains snowpack, mountain snowpack, and long-term precipitation and temperature outlooks. March runoff in the Missouri River Basin above Sioux City was 1.7 MAF, 57% of average.