January runoff in the Missouri River Basin above Sioux City was 1.0 million acre-feet, which is 132% of average. Runoff was above average for all of the reaches in the upper Missouri River Basin, even though most of the upper Basin had below-normal precipitation. This was due to above average temperatures causing early snowmelt.
The updated 2026 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average.
“Runoff into the reservoir system was above average for the month of January despite the dry conditions across the basin,” said John Remus, chief of the U.S. Army Corps of Engineers’ Missouri River Basin Water Management Division. “With the below-average plains and mountain...
The 2026 calendar year runoff forecast above Sioux City is 23.4 MAF, 91% of average. The Feb. 3 mountain snowpack in the Fort Peck reach was 81% of average, while the mountain snowpack in the Fort Peck to Garrison reach was 90% of average.
Broadcast news story about two Missouri River towboats operated by the U.S. Army Corps of Engineers, Omaha District that are undergoing major engine overhauls to ensure reliable navigation and river maintenance operations ahead of the 2026 season.
