Missouri River Monthly Update - April 2023
The Elements of Runoff - Plains snow water equivalent for Upper Missouri River Basin Runoff - plains snow melt is typically complete by April. Mountain snow begins to accumulate in October, peaks in April and snowmelt is usually complete by mid-July. The April 1 runoff forecast is 26.4 million acre feet. The plains snow is hanging on late into the season, which means an increased risk for rapid snowmelt.