Aug 12, 2011
A potent short wave trough moving across North Dakota combined with moderate instability to create an environment favorable for multicellular thunderstorms during the afternoon hours of the 12th. Above average precipitable water values ahead of the trough also increased the rainfall with the thunderstorms. Severe Thunderstorm Watch number 771 was in effect for this event.
Source: NOAA National Weather Service Storm Events Database (event 340912). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Wells County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.