May 11, 2011
This was part of historic flooding in North Dakota with statewide costs estimated around 1.5 billion dollars. Flooding was the result of significant winter snows and significant spring rains, not only in North Dakota but in Montana as well. Rocky Mountain snowpack was four to six times normal. Flooding was along the Missouri River from the Montana border to Garrison Dam. Dams were overwhelmed by the amount of water. Flooding included river, ground, and overland types. Oil wells were shuttered. E
Source: NOAA National Weather Service Storm Events Database (event 356207). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Williams County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.