A bowing MCS developed in Iowa ahead of a cold front and pushed eastward into southern Wisconsin during the afternoon.  The event was characterized by gusty winds with minor damage (trees down and power lines down) as well as heavy rain.  At one point, more than 19,000 WE Energies' customers over southeast Wisconsin were without power after the event - mostly in the counties of Racine and Kenosha.

Thunderstorm Wind in WALWORTH, WISCONSIN
From 18-JUN-10 14:50:00 to 18-JUN-10 14:50:00 (CST-6)
Location: LAKE GENEVA
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 18-JUN-10 15:10:00 to 18-JUN-10 15:10:00 (CST-6)
Location: MUKWONAGO
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm wind gusts toppled several large trees.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 18-JUN-10 15:31:00 to 18-JUN-10 15:31:00 (CST-6)
Location: (MKE)MITCHELL APT MI
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in JEFFERSON, WISCONSIN
From 18-JUN-10 01:12:00 to 18-JUN-10 01:12:00 (CST-6)
Location: WATERTOWN
Magnitude: 50.00 EG
Reported by: Trained Spotter

A tree two and one half feet in diameter blew down partially blocking the intersection of Highway 26 and Milwaukee Street in Watertown. Time estimated from radar.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 18-JUN-10 15:20:00 to 18-JUN-10 15:20:00 (CST-6)
Location: MUSKEGO
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a wind gust of 65 knots and a few large trees uprooted or broken.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 18-JUN-10 15:15:00 to 18-JUN-10 15:15:00 (CST-6)
Location: DOWNTOWN KENOSHA
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Powerful thunderstorm wind gusts toppled several large trees and some power-lines came down.  Minor urban flooding (water over the curb) also occurred.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 18-JUN-10 15:26:00 to 18-JUN-10 15:26:00 (CST-6)
Location: DOWNTOWN KENOSHA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

HAM radio operator estimated a thunderstorm wind gust of 52 knots with a few large trees down.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 18-JUN-10 15:09:00 to 18-JUN-10 15:09:00 (CST-6)
Location: KENOSHA AIRPORT
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured 51 knot wind gust by ASOS at Kenosha Airport.

Thunderstorm Wind in LAFAYETTE, WISCONSIN
From 18-JUN-10 13:30:00 to 18-JUN-10 13:30:00 (CST-6)
Location: SOUTH WAYNE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down.

Thunderstorm Wind in GREEN, WISCONSIN
From 18-JUN-10 13:45:00 to 18-JUN-10 13:45:00 (CST-6)
Location: JUDA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

General public reported a swath of downed trees from Martintown to northwest of Brodhead.  Scattered pockets of felled trees were reported in a band about 3 miles wide.

Thunderstorm Wind in GREEN, WISCONSIN
From 18-JUN-10 13:40:00 to 18-JUN-10 13:40:00 (CST-6)
Location: MARTINTOWN
Magnitude: 56.00 EG
Reported by: Public

General public reported a swath of downed trees from Martintown to northwest of Brodhead.  Scattered pockets of felled trees were reported in a band about 3 miles wide.

Thunderstorm Wind in GREEN, WISCONSIN
From 18-JUN-10 13:50:00 to 18-JUN-10 13:50:00 (CST-6)
Location: BRODHEAD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

General public reported a swath of downed trees from Martintown to northwest of Brodhead.  Scattered pockets of felled trees were reported in a band about 3 miles wide.

Thunderstorm Wind in WALWORTH, WISCONSIN
From 18-JUN-10 14:38:00 to 18-JUN-10 14:38:00 (CST-6)
Location: DELAVAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ham Radio Operator reported estimated gusts up to 52 knots.

Thunderstorm Wind in ROCK, WISCONSIN
From 18-JUN-10 14:05:00 to 18-JUN-10 14:05:00 (CST-6)
Location: ORFORDVILLE
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Public reported trees and power-lines down.

Thunderstorm Wind in ROCK, WISCONSIN
From 18-JUN-10 14:24:00 to 18-JUN-10 14:24:00 (CST-6)
Location: DOWNTOWN JANESVILLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported downed trees.

Thunderstorm Wind in ROCK, WISCONSIN
From 18-JUN-10 14:20:00 to 18-JUN-10 14:20:00 (CST-6)
Location: BELOIT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A newspaper report indicated that trees and power lines were down due to powerful thunderstorm wind gusts.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 18-JUN-10 15:11:00 to 18-JUN-10 15:11:00 (CST-6)
Location: DOWNTOWN KENOSHA
Magnitude: 65.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Amateur Radio

HAM radio operator reported trees and power lines down. Law enforcement reported a section of roof measuring 20 feet by 20 feet was blown off a building.  A tree fell onto a vehicle and damaged it.  Elsewhere a tree damaged an awning.  At least 50 calls were made to the city 911 dispatchers about downed wires.

Thunderstorm Wind in ROCK, WISCONSIN
From 18-JUN-10 14:26:00 to 18-JUN-10 14:26:00 (CST-6)
Location: DOWNTOWN JANESVILLE
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Powerful thunderstorm winds raked the city of Janesville.  At least 50 large trees were uprooted, and numerous power-lines were down.  A metal roof of a business was ripped off by the winds.  Elsewhere, a tree fell on a flatbed truck (minor damage), and a carriage house roof was blown off.  Heavy rains resulted in minor urban flooding and a couple stalled vehicles.

Thunderstorm Wind in WALWORTH, WISCONSIN
From 18-JUN-10 14:40:00 to 18-JUN-10 14:40:00 (CST-6)
Location: LAKE GENEVA
Magnitude: 56.00 MG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Public reported trees and power lines down.  A house was damaged resulting in approximatley $2,000 worth of damage.