Aug 9, 2009
Three rounds of thunderstorms produced wind damage and flash flooding during the afternoon, evening, and overnight hours of August 9th. The thunderstorms developed as a cold front trailing from low pressure over northeast Wisconsin moved into a hot, humid and unstable air mass in place over southern Wisconsin. Temperatures warmed to 85 and 90 degrees, with dew-points in the 70s. Strong unidirectional vertical wind shear produced bowing line segments that caused damaging wind gusts. The thund
Source: NOAA National Weather Service Storm Events Database (event 194072). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Rock County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.