News Releases

7 Aug 2025

Below normal runoff continues in the Upper Missouri Basin

July runoff in the Missouri River Basin above Sioux City, Iowa was 2.0 million acre-feet (MAF), 62% of average. Runoff was below-average in the Fort Peck and Garrison reaches with average to above-average runoff in the lower four reaches. The annual runoff forecast above Sioux City, Iowa is 19.2 MAF, 75% of average.

9 Jul 2025

June runoff much below average; Navigation flow support decreased slightly after System storage check

June runoff in the Missouri River Basin above Sioux City, Iowa was 3.3 million acre-feet, 60% of average. The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average.

5 Jun 2025

May runoff average; Missouri River upper basin runoff forecast below normal

The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. May runoff in the Missouri River Basin above Sioux City was 3.4 million acre-feet, 100% of average.

8 May 2025

Missouri River upper basin runoff forecast lowered due to dry conditions

The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. April runoff in the Missouri River Basin above Sioux City was 1.4 million acre-feet, 48% of average.

9 Apr 2025

Missouri River upper basin runoff continues below average forecast

The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. March runoff in the Missouri River Basin above Sioux City was 2.3 million acre-feet, 76% of average.

18 Mar 2025

Virtual Missouri River water management public meetings set for April

Two meetings to hear from the public about planned operation of the Missouri River Mainstem System will be held the first week in April.