Jun 19, 2009
The final in a series of upper level disturbances propagated northeastward across southern Wisconsin during the afternoon and evening of June 19th. This impulse, combined with strong upper level jet dynamics and a very moist, unstable atmosphere, allowed for storms to redevelop across southern Wisconsin. Bulk shear values of 50-60 kts, MLCAPE values near 2500 J/kg, and PW values near 1.8 allowed for a series of short thunderstorm lines to move through southern Wisconsin. The result was wind d
Source: NOAA National Weather Service Storm Events Database (event 176866). 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.