Aug 22, 2007
During the afternoon and evening hours of August 22nd, the second round of storms for the calendar day moved east across south-central and southeast Wisconsin. The clusters or short lines of storms moved east at a speed of about 30 knots (35 mph), and generated damaging downburst straight-line winds that toppled trees and power-lines, and heavy rains that triggered flash flooding. Synoptically, a stationary front stretched from northern Iowa to Wisconsin/Illinois border. Warm, moist, unstable
Source: NOAA National Weather Service Storm Events Database (event 57564). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Waukesha County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.