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  • Missouri River Basin drought conditions persist

    While the Missouri River basin has seen improved runoff for two consecutive months, it is not enough to overcome the long-term drought persisting in much of the basin. July runoff in the Missouri River basin above Sioux City, Iowa was 3.2 million acre-feet, which is 98% of average and 0.7 MAF more than was forecast last month. This has led to an annual runoff forecast of 20.6 MAF, which is 80% of average and 0.6 MAF higher than last month’s forecast.
  • June’s improved runoff not enough for Missouri River basin drought

    Despite improved runoff in June, water conservation measures will continue for the second half of the navigation flow support season based on the July 1 Missouri River Mainstem Reservoir System storage.
  • Below average runoff forecasts for upper Missouri River Basin continue

    Runoff continues to be below average in the upper Missouri River Basin above Sioux City, Iowa. Below-normal precipitation, dry soil conditions in the western portions of the basin, and cooler-than-normal temperatures slowing mountain snowmelt, resulted in a May runoff of 2.7 million acre-feet. While this was 0.4 MAF more than forecast last month, this volume is still 79% of average.
  • Army Corps updates Safe Lockage Policy for recreational vessels on Columbia, Snake rivers

    The U.S. Army Corps of Engineers has put the following guidelines in place for the continued safe passage of recreational craft through the navigation locks at McNary, John Day, The Dalles, and Bonneville dams on the Columbia River, and Ice Harbor, Lower Monumental, Little Goose and Lower Granite dams on the Snake River:
  • Drought conditions persist throughout the Missouri River Basin

    Dry conditions in April resulted in well-below average runoff in the upper Missouri River Basin. April runoff was 1.5 million acre-feet, which is 51% of average. The updated 2022 upper Basin runoff forecast is 17.8 MAF, 69% of average, which, if realized, would rank as the 23rd lowest calendar year runoff volume.
  • Upper Missouri River basin forecast runoff remains well below normal; water conservation measures continue

    Reservoir inflows in the Missouri River basin above Sioux City, Iowa, were well-below average in March. The March runoff of 1.5 million acre-feet (MAF) was 48% of average for the month. The updated 2022 upper Basin runoff forecast is 17.8 MAF, 69% of average, approximately 2.6 MAF less than the March 1 forecast.