Scattered flash flood events occurred over southern Wisconsin thanks to a series of slow-moving clusters or short lines of thunderstorms, each with a round of heavy rain, that moved northeast through southern Wisconsin.  It didn't help that the soils were nearly saturated before the rain even started.  Flash flooding was reported in the counties of Dodge, Jefferson, Waukesha, Milwaukee, Racine, and Kenosha.  Based on spotter reports, rainfall rates reached 3 to 5.5inches per hour in some of the most intense storms.The worst flooding problems occurred in and near Watertown (especially the west side in both Jefferson and Dodge Counties), in the Lake Mills-Johnson Creek area north along the Crawfish River in Jefferson County, in the Brookfield-Elm Grove area in Waukesha County, in Wauwatosa (Milwaukee Co.), in the Kansasville-Raymond-Sturtevant-Racine areas in Racine County, and in the city of Kenosha (Kenosha Co).  In all of these areas, the flash flooding consisted of flooded and closed roads with water depths of 1 to 5 feet, flooded basements, and gravel shoulder washouts.  Additionally, there was one road washout in Elm Grove where the driver of a vehicle was stranded in the high water levels for about 30 minutes.  Nearly every road and backyard in Wauwatosa was flooded.  Jefferson County picked up the greatest amounts of rain.  A NWS gage site near Milford on the Crawfish River measured 6.21 inches for the 24-hour period ending about 7 A.M. CDT Thursday, September 13, 2006.  Other measured amounts in Jefferson County include - 5.10 at the Watertown WWTP, 4.69 inches at a location 1.2 mile southwest of downtown Watertown (severe weather spotter), 3.59 inches at the Lake MIlls WWTP, 2.70 inches at a river gage site on the south-side of the city of Jefferson, 2.42 inches at the Jefferson WWTP,  and 2.02 inches at the NWS office about 3.8 miles southeast of Sullivan.  Other rainfall totals include - 3.75 inches in  Elm Grove (Waukesha Co.), 3.25 inches in Hales Corner (Milwaukee Co.), 2.48 inches in Caledonia (Racine Co.), and 2.15 inches at the Kenosha Airport (Kenosha Co.).  Unofficially, WSR-88D radar rainfall estimates suggest around 3 inches may have fallen in the Kansasville area just northwest of Union Grove (Racine Co.), and over the southeast corner of Kenosha County.  Additionally, radar suggested that 4 to 5 inches fell over extreme southwest and south-central Dodge County, west of Watertown.The several rounds of thunderstorms were the result of a surface low-pressure moving northeast along a front through the Chicago area, while an upper-level low-pressure moved southeast across northern Illinois.  These low-pressures pulled and focused moisture over south-central and southeast Wisconsin.  The unofficial rainfall graphic for Jefferson County was attached to the Kenosha County flash flood event in order to have the graphic appear in the StormData publication between the flash flood event header-strips above and this narrative which covers the entire flash flood episode for September 12, 2006.

Flash Flood in DODGE, WISCONSIN
From 12-SEP-06 12:00:00 to 12-SEP-06 15:00:00 (CST)
Location: WATERTOWN
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in JEFFERSON, WISCONSIN
From 12-SEP-06 12:15:00 to 12-SEP-06 15:00:00 (CST)
Location: MILFORD
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in WAUKESHA, WISCONSIN
From 12-SEP-06 15:20:00 to 12-SEP-06 16:00:00 (CST)
Location: BROOKFIELD
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in MILWAUKEE, WISCONSIN
From 12-SEP-06 15:30:00 to 12-SEP-06 17:30:00 (CST)
Location: WAUWATOSA
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in RACINE, WISCONSIN
From 12-SEP-06 15:25:00 to 12-SEP-06 17:30:00 (CST)
Location: KANSASVILLE
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in RACINE, WISCONSIN
From 12-SEP-06 15:15:00 to 12-SEP-06 17:30:00 (CST)
Location: STURTEVANT
Property damage: 100K
Reported by: LAW ENFORCEMENT

Flash Flood in KENOSHA, WISCONSIN
From 12-SEP-06 16:15:00 to 12-SEP-06 17:30:00 (CST)
Location: KENOSHA
Property damage: 100K
Reported by: LAW ENFORCEMENT