Mountain snowpack in the upper Missouri River Basin has been melting at slower-than-average rates due to cooler-than-normal temperatures during the spring and early summer, which has also allowed for additional late season accumulation. On June 1, 60% of the annual peak remains above Fort Peck Dam, and 68% of the annual peak remains above Garrison Dam. The mountain snowpack peaked above Fort Peck on April 29 at 85% of average, while the mountain snowpack in the Fort Peck to Garrison reach peaked on May 3 at 92% of average. Mountain snowpack normally peaks near April 15.