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  • Spring precipitation improves Missouri River Basin runoff forecast

    Late season plains snowpack accumulation and subsequent melting led to increased runoff throughout the upper Missouri River Basin during April. For the month, runoff was 4.7 million acre-feet, 159% of average, for the basin above Sioux City, IA. The annual runoff forecast for the upper Missouri River Basin above Sioux City, IA is 26.9 MAF, 105% of average, and 0.5 MAF higher than last month’s forecast. However, soil moisture remains slightly below normal in eastern Montana and the western Dakotas, and well below normal in Nebraska. Even with the plains snowmelt, soils dried out in late April over a large portion of the upper basin.
  • Missouri River Spring Virtual Public Meeting - Make Up - April 20

    A virtual make up meeting has been scheduled for April 20 at 1 p.m. after two in-person meetings were canceled due to weather on April 4. The virtual meeting can be accessed at the QR code and the url in the graphic.
  • 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.    
  • Upper basin runoff forecast below average; Gavins Point releases to increase for navigation flow support; April public meetings

    The updated 2023 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. The 2023 calendar year runoff forecast above Sioux City is 21.5 million acre feet, 84% of average. The runoff forecast is based on current soil moisture conditions, plains snowpack, mountain snowpack, and long-term precipitation and temperature outlooks. February runoff in the Missouri River Basin above Sioux City was 1.0 MAF, 86% of average.
  • Below average runoff continues for the upper Missouri River Basin in 2023

    The updated 2023 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 1.1 million acre-feet, 134% of average. Runoff was above average due to warmer-than-normal temperatures in the upper basin resulting in some snowmelt runoff.
  • Dry Conditions expected to persist for the Missouri River Basin

    For the 2022 calendar year, Missouri River basin runoff above Sioux City, Iowa totaled 19.3 million acre-feet, 75% of average. This was the 30th lowest annual runoff for the Missouri River Basin in 125 years of record-keeping. The ongoing drought shows little relief in sight and the U.S. Army Corps of Engineers predicts runoff into the mainstem reservoir system will remain below normal. For 2023, runoff in the Missouri River basin above Sioux City, Iowa is forecast to be 20.8 MAF, 81% of average.