May 21, 2010
An upper level impulse, abundant moisture and a south-southwesterly flow combined to allow for the development of thunderstorms. While several produced small hail and locally gusty winds, the main effect was torrential rainfall, on the order of 1 to 3 inches per hour. This resulted in flash flooding in several locations across western Defiance County.
Source: NOAA National Weather Service Storm Events Database (event 257068). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Defiance County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.