Missouri Basin Update - June 29, 2021
System storage is 55.3 MAF, 0.2 MAF less than last week Upper Basin runoff during the first 4 weeks of June was 57% of average Mountain snowpack has melted. Over the last 7 days, the lower basin has seen significant precipitation resulting in flooding on tributary streams and the lower Missouri River. Navigation support for the 2nd half of the navigation season (July 1 to December 1) will likely be 1,500 to 2,000 cfs less than full service. The navigation season length will be a full 8-month season. Winter releases from Gavins Point Dam are forecast to be at the minimum rate of 12,000 cfs.