Below average forecasts continue for upper Missouri River Basin
Runoff continues to be below average in the upper Missouri River Basin above Sioux City, Iowa. Belownormal 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 percent of average.