Severe thunderstorms produced damaging winds during the morning hours of September 2nd across portions of southwest and central Wisconsin. Law enforcement, trained spotters and National Weather Service employees reported numerous trees and power lines down from La Crosse, Trempealeau and Vernon counties eastward to Adams County. Over 10,000 residents loss power and schools were either delayed for two hours or closed in these areas.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:47:00 to 02-SEP-11 06:47:00 (CST-6)
Location: CASHTON
Magnitude: 61.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Public

A tree was blown down on a home with other trees down on power lines on Newport Road near Cashton.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:50:00 to 02-SEP-11 06:50:00 (CST-6)
Location: ST MARYS
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Numerous jack pine trees were snapped off, a 14 inch diameter tree blown down, and a large oak tree split four miles south of Norwalk.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 02-SEP-11 07:13:00 to 02-SEP-11 07:17:00 (CST-6)
Location: SOUTH NECEDAH
Magnitude: 56.00 EG
Property damage: 16.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees were blown down and other trees were snapped off from three miles southwest of Necedah to three miles southeast of Necedah.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-SEP-11 06:26:00 to 02-SEP-11 06:26:00 (CST-6)
Location: GALESVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An estimated 60 mile per hour wind gust occurred in Galesville.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 07:00:00 to 02-SEP-11 07:00:00 (CST-6)
Location: OAKDALE
Magnitude: 61.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Public

Large tree branches were blown down which caused siding and roof damage in Oakdale.

Thunderstorm Wind in VERNON, WISCONSIN
From 02-SEP-11 06:38:00 to 02-SEP-11 06:38:00 (CST-6)
Location: BLOOMINGDALE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated wind gust of 70 miles per hour occurred three miles northeast of Westby which knocked down a pine tree and caused damaged to a house.

Thunderstorm Wind in VERNON, WISCONSIN
From 02-SEP-11 06:24:00 to 02-SEP-11 06:24:00 (CST-6)
Location: STODDARD
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down with power outages in Stoddard and Genoa.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:43:00 to 02-SEP-11 06:43:00 (CST-6)
Location: PORTLAND
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 9.00K
Reported by: Public

At least 31 apple trees were blown down at the Maple Ridge Orchard.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:57:00 to 02-SEP-11 06:57:00 (CST-6)
Location: TOMAH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mile per hour wind gust occurred in Tomah.

Thunderstorm Wind in ADAMS, WISCONSIN
From 02-SEP-11 07:23:00 to 02-SEP-11 07:23:00 (CST-6)
Location: DELLWOOD
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several six inch diameter trees were blown down near Castle Rock Park.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:48:00 to 02-SEP-11 06:48:00 (CST-6)
Location: ST MARYS
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was blown down on a mobile home three miles southwest of Norwalk.

Thunderstorm Wind in ADAMS, WISCONSIN
From 02-SEP-11 07:27:00 to 02-SEP-11 07:27:00 (CST-6)
Location: FRIENDSHIP
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and power lines were blown down four miles north of Friendship. One of these trees fell on a vehicle on State Highway 21 at the entrance of Roche-A-Cri State Park.

Thunderstorm Wind in ADAMS, WISCONSIN
From 02-SEP-11 07:25:00 to 02-SEP-11 07:25:00 (CST-6)
Location: ADAMS
Magnitude: 56.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and power lines were blown down across portions of Adams County. The downed trees blocked roadways and fell on top of homes and cars. According to the emergency manager, it appears that Preston Township in the central part of the county, was hit the hardest with downed trees.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-SEP-11 06:22:00 to 02-SEP-11 06:22:00 (CST-6)
Location: CENTERVILLE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several trees were blown down along State Highway 35 between Centerville and Trempealeau.

Lightning in TREMPEALEAU, WISCONSIN
From 02-SEP-11 06:25:00 to 02-SEP-11 08:25:00 (CST-6)
Location: CENTERVILLE
Property damage: 150.00K
Crop damage: 0.00K
Reported by: Newspaper

A house was destroyed by a fire started by a lightning strike.

Thunderstorm Wind in VERNON, WISCONSIN
From 02-SEP-11 06:27:00 to 02-SEP-11 06:27:00 (CST-6)
Location: CHASEBURG
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

A roof was blown off a house in Chaseburg.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 02-SEP-11 06:33:00 to 02-SEP-11 06:33:00 (CST-6)
Location: WEST SALEM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An estimated wind gust of 60 miles per hour occurred in West Salem.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:52:00 to 02-SEP-11 06:52:00 (CST-6)
Location: WILTON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees were blown down on power lines causing power outages in Wilton.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 02-SEP-11 06:25:00 to 02-SEP-11 06:25:00 (CST-6)
Location: LA CROSSE
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several trees and power lines were blown down in the city of La Crosse. One tree went down on an apartment building on South 33rd Street with several trees down in the vicinity of the Shelby ball fields.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 02-SEP-11 06:26:00 to 02-SEP-11 06:26:00 (CST-6)
Location: (LSE)LA CROSSE MUNI
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The automated weather observing equipment at the La Crosse Municipal airport measured a wind gust of 63 miles per hour. A 62 mph gust was also measured at the same time in Onalaska.

Thunderstorm Wind in MONROE, WISCONSIN
From 02-SEP-11 06:49:00 to 02-SEP-11 06:49:00 (CST-6)
Location: CATARACT
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mph wind gust blew down several large trees along County Road I four miles east of Cataract.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 02-SEP-11 07:21:00 to 02-SEP-11 07:21:00 (CST-6)
Location: NECEDAH HORNSBURG AR
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were blown down near Sandstone Estates with one falling on trailer.

Thunderstorm Wind in VERNON, WISCONSIN
From 02-SEP-11 06:33:00 to 02-SEP-11 06:33:00 (CST-6)
Location: COON VLY
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down in and near Coon Valley. Especially hit hard, was the Norskedalen Nature & Heritage Center where more than 20 trees went down and several windows were broken by wind blown walnuts.