Jun 1, 2011
A record rain event in May in eastern Montana combined with high water from storms in April and May (and early spring snow melt) and brought high water to the Missouri River chain of reservoirs. The high water levels plus the threat of flood waters due an unusually high snow pack in the Rockies over the upper Missouri River Basin and additional heavy rain all contributed to record releases from the Missouri River Reservoirs. Releases from Gavins Point Dam, which is the last in the chain, increa
Source: NOAA National Weather Service Storm Events Database (event 297259). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Washington County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.