On June 1st, isolated severe storms generated a couple weak tornadoes in Lafayette County and dome downburst wind damage (toppled trees) in the counties of Dodge and Walworth.  This activity was the first day of a 7-day period of periodic showers and storms across southern Wisconsin as a cut-off, upper-level, low pressure moved slowly east from the Dakotas through the lower Great Lakes Region.  Spiral bands of convection developed, and became enhanced with daytime heating.  There was a sufficient amount of vertical wind shear to generate isolated supercells  and scattered severe storms from time to time.

Tornado in LAFAYETTE, WISCONSIN
From 01-JUN-07 14:17:00 to 01-JUN-07 14:18:00 (CST-6)
Location: SHULLSBURG
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A brief, weak tornado spun up about 3.8 miles south (168 degrees) of Shullsburg.  Only some minor tree damage was noted.  Specifically, it occurred about 0.7 miles southwest/225 degrees of the intersection of Blackhawk Rd. and Monticello Rd.  The lat/lon data is: N42.51590 W90.21600 for the start point and N42.51696 W90.21577 for the end point.  The average path width was about 10 yards. DI#27 (TH), DOD2.  Estimated winds 65-70 knots (75-80 mph).

Heavy Rain in WAUKESHA, WISCONSIN
From 01-JUN-07 18:00:00 to 01-JUN-07 20:00:00 (CST-6)
Location: DOWNTOWN WAUKESHA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rains up to around 2 inches in two hours resulted in minor urban flooding of roads since storm sewers were unable to handle the volumn of runoff.  Water depths on some roads reached 10 to 15 inches.

Thunderstorm Wind in DODGE, WISCONSIN
From 01-JUN-07 16:55:00 to 01-JUN-07 16:55:00 (CST-6)
Location: WATERTOWN
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An isolated downburst leveled trees near the intersection fo STH 16 and CTH R.  At least a couple homes sustained some roof damage when large trees fell on them.

Thunderstorm Wind in WALWORTH, WISCONSIN
From 01-JUN-07 17:10:00 to 01-JUN-07 17:10:00 (CST-6)
Location: SHARON
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

An isolated downburst leveled trees on the southwest side of the village.  There was slight power-line damage.

Heavy Rain in MILWAUKEE, WISCONSIN
From 01-JUN-07 16:50:00 to 01-JUN-07 18:50:00 (CST-6)
Location: DOWNTOWN MILWAUKEE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rains up to 2.65 inches in two hours resulted in minor urban flooding of roads since storm sewers were unable to handle the volumn of runoff.

Tornado in LAFAYETTE, WISCONSIN
From 01-JUN-07 14:31:00 to 01-JUN-07 14:32:00 (CST-6)
Location: DUNBARTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A brief, weak tornado spun up about 2.1 miles west-northwest of Dunbarton, or about 3.3 miles east of Shullsburg, or 0.27 southeast (133 degrees) of the insection of STH 11 and CTH E/Summit Rd.  It resulted n only matted-down grasses, since the corn crop wasn't tall enough to sustain damage.  It traveled north and cross STH 11, about 0.23 miles east of the intersection of STH 11 and CTH E, and dissipated just north of STH 11.  The decaying supercell thunderstorm that generated this tornado also spun up an earlier weak tornado about 3.8 miles south of Shullsburg.  The specific lat/lon data for the Dunbarton tornado is:  N42.57850 W90.16877 for the start and N42.58176 W90.16859 for the end point.  The average path width was 20 yards.  No DI.  Estimated wind speed is 56-61 knots (65-70 mph).