(NAFB.com) – The updated 2025 calendar year runoff forecast for the Missouri River Basin above Sioux City, Iowa, continues to be below average. January runoff in the Basin above Sioux City, Iowa, was 0.7 million acre-feet, 92 percent of the average. Runoff was near or below average for most of the Missouri River Basin, and most of the upper basin had below-normal precipitation. “Runoff into the reservoir system was below average for the month of January, and conditions across the basin remain dry,” said John Remus of the U.S. Army Corps of Engineers. “With the below-average plains and mountain snowpack, we are forecasting a below-average runoff year for the basin.” The 2025 calendar year runoff forecast above Sioux City is 20.6 million acre-feet, 80 percent of the average. The start of the runoff season typically is March 1, when the total volume of water in the System is expected to be 50 million acre-feet.