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  • Gavins Point winter releases will be minimum rate

    Abnormally dry or drought conditions are currently present across 73% of the Basin, with drought conditions likely to persist or worsen through November. August runoff was 1.2 million acre-feet (MAF), 86% of average above Sioux City. The updated 2024 calendar year forecast for the upper Basin is 23.8 (MAF), 92% of average. Average annual runoff for the upper Basin is 25.7 MAF.

  • Drought conditions persist in Missouri River Basin through July

    July runoff in the Missouri River basin above Sioux City, Iowa was 2.8 million acre-feet (MAF), 85% of average with below-average runoff in the upper three reaches and above-average runoff in the lower three reaches. The annual runoff forecast above Sioux City, Iowa is 23.9 MAF, 93% of average.

  • System operations returning to normal post flooding

    Significant rainfall led to an above average runoff in the upper Missouri River Basin. June runoff was 6.6 million acre-feet, which is 119% of average and 2.6 MAF higher than forecast. A strong weather system moved into the basin on June 21 producing excessive rainfall in eastern South Dakota, north central and northeastern Nebraska, and northwestern Iowa. The rainfall totals exceeded 600% of normal over the 24-hour period.

  • May runoff slightly above average; Fort Peck flow test continues

    Active rainfall patterns across the Midwest provided much needed moisture to several portions of the Missouri River Basin. Large areas of Montana, North Dakota, Wyoming, eastern South Dakota, and eastern Nebraska received more than 200% of normal precipitation for the month of May. However, central South Dakota, western Nebraska, and eastern Colorado received as little as 25% of normal precipitation.

  • Missouri River Basin runoff forecast improves but remains below average; Fort Peck Flow Test underway

    As warmer weather moves into the Missouri River Basin, spring precipitation brought some much-needed moisture throughout the basin. For the month of April, runoff was 2.1 million acre-feet, 71% of average, for the basin above Sioux City, Iowa. The annual runoff forecast for the upper Missouri River Basin above Sioux City is 19.2 MAF, 75% of average, and 1.7 MAF higher than last month’s forecast.

  • Upper basin runoff forecast improves, remains below average; Fort Peck test flows to begin in late April

    The latest 2024 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa

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