As a cold front moved across Wisconsin, it sparked severe thunderstorms during the late evening of August 15th into the early morning hours of August 16th. These storms produced a path of damaging winds and large hail from the southern portions of Buffalo County to the southeast corner of Adams County. The most concentrated wind damage was near the Trempealeau-La Crosse County line, including communities of Galesville and Holmen, where estimated winds of 60 mph knocked down several trees and power lines. Most of the hail was estimated to be about the size of a quarter with this falling for up to 10 minutes at Perrot State Park (Trempealeau County).

Hail in LA CROSSE, WISCONSIN
From 15-AUG-12 23:44:00 to 15-AUG-12 23:44:00 (CST-6)
Location: COUNCIL BAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 15-AUG-12 23:44:00 to 15-AUG-12 23:44:00 (CST-6)
Location: MIDWAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An estimated 60 mph wind gust occurred on the south side of Holmen.

Thunderstorm Wind in BUFFALO, WISCONSIN
From 15-AUG-12 23:00:00 to 15-AUG-12 23:00:00 (CST-6)
Location: FOUNTAIN CITY
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down near Fountain City.

Hail in TREMPEALEAU, WISCONSIN
From 15-AUG-12 23:26:00 to 15-AUG-12 23:35:00 (CST-6)
Location: TREMPEALEAU
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Quarter sized hail fell for around 10 minutes at Perrot State Park.

Hail in LA CROSSE, WISCONSIN
From 15-AUG-12 23:39:00 to 15-AUG-12 23:39:00 (CST-6)
Location: NEW AMSTERDAM
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 15-AUG-12 23:39:00 to 15-AUG-12 23:39:00 (CST-6)
Location: HOLMEN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down across County Road V and Moe Coulee Road north of Holmen.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 15-AUG-12 23:41:00 to 15-AUG-12 23:41:00 (CST-6)
Location: HOLMEN
Magnitude: 50.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down on a house east of Holmen. Large branches on the tree pierced through the roof allowing water to enter the house.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 15-AUG-12 23:38:00 to 15-AUG-12 23:38:00 (CST-6)
Location: HOLMEN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines and tree branches were blown down near the Holmen Police Department.

Thunderstorm Wind in BUFFALO, WISCONSIN
From 15-AUG-12 23:09:00 to 15-AUG-12 23:09:00 (CST-6)
Location: FOUNTAIN CITY
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was blown down onto County Road M near the intersection of County Road YY just east of Fountain City.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 15-AUG-12 23:57:00 to 15-AUG-12 23:57:00 (CST-6)
Location: BANGOR
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines were blown down near the intersection of State Highways 162 and 16 north of Bangor.

Thunderstorm Wind in MONROE, WISCONSIN
From 16-AUG-12 00:10:00 to 16-AUG-12 00:10:00 (CST-6)
Location: LEON
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 60 mph wind gust along with one inch hail occurred in Leon.

Hail in MONROE, WISCONSIN
From 16-AUG-12 00:10:00 to 16-AUG-12 00:13:00 (CST-6)
Location: SPARTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Dime to quarter sized hail fell and was accompanied by wind gusts of 45 to 50 mph just south of Sparta along Interstate 90 at Exit 25 for State Highway 27.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 16-AUG-12 01:50:00 to 16-AUG-12 01:50:00 (CST-6)
Location: MAUSTON NW LSBN ARPT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down across U.S. Highway 12/State Highway 16 between Mauston and New Lisbon.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 16-AUG-12 01:40:00 to 16-AUG-12 01:40:00 (CST-6)
Location: NEW LISBON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down on County Road A between Hustler and New Lisbon.

Thunderstorm Wind in ADAMS, WISCONSIN
From 16-AUG-12 02:16:00 to 16-AUG-12 02:16:00 (CST-6)
Location: PLAINVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down northeast of Plainville.

Thunderstorm Wind in ADAMS, WISCONSIN
From 16-AUG-12 02:21:00 to 16-AUG-12 02:21:00 (CST-6)
Location: ADAMS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down south of Friendship.

Thunderstorm Wind in ADAMS, WISCONSIN
From 16-AUG-12 02:29:00 to 16-AUG-12 02:29:00 (CST-6)
Location: BROOKS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down south of Brooks.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 15-AUG-12 23:20:00 to 15-AUG-12 23:23:00 (CST-6)
Location: CENTERVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 5.00K
Reported by: NWS Employee

Strong winds blew down corn and combined with nickel sized hail stripped crops along and near Highway 35 between Galesville and Centerville.