Two lines of severe thunderstorms moved across western Wisconsin during the afternoon and evening of May 17th. This was the third day in a row that severe weather impacted the area. The storms primarily produced damaging winds, but also dropped one tornado. An EF-1 tornado moved across southern Trempealeau County east of Galesville and damaged farm buildings and trees. Trees were blown down on houses and cars in Strum (Trempealeau County), winds were measured at 80 mph in Patch Grove (Grant County) with numerous barns and outbuildings destroyed.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 17-MAY-17 16:04:00 to 17-MAY-17 16:04:00 (CST-6)
Location: LYTLE
Magnitude: 50.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees were blown down on Brice Prairie. One large tree fell on a camper and destroyed it.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 17-MAY-17 16:07:00 to 17-MAY-17 16:07:00 (CST-6)
Location: HOLMEN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An estimated 60 mph wind gust occurred in Holmen.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:15:00 to 17-MAY-17 16:15:00 (CST-6)
Location: GALESVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Employee

Pine trees were snapped east of Galesville.

Thunderstorm Wind in JACKSON, WISCONSIN
From 17-MAY-17 16:27:00 to 17-MAY-17 16:27:00 (CST-6)
Location: NORTH BEND
Magnitude: 53.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down just north of North Bend.

Hail in RICHLAND, WISCONSIN
From 17-MAY-17 16:39:00 to 17-MAY-17 16:39:00 (CST-6)
Location: BOAZ
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in JACKSON, WISCONSIN
From 17-MAY-17 16:47:00 to 17-MAY-17 16:47:00 (CST-6)
Location: VAUDREUIL
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were blown down just north of Black River Falls.

Thunderstorm Wind in RICHLAND, WISCONSIN
From 17-MAY-17 16:47:00 to 17-MAY-17 16:47:00 (CST-6)
Location: GILLINGHAM
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down along State Highway 56 in Gillingham.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:00:00 to 17-MAY-17 16:00:00 (CST-6)
Location: TREMPEALEAU
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down on houses and cars in Trempealeau.

Thunderstorm Wind in VERNON, WISCONSIN
From 17-MAY-17 17:01:00 to 17-MAY-17 17:01:00 (CST-6)
Location: HILLSBORO
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down in Hillsboro. One downed tree took out a light pole.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 17:09:00 to 17-MAY-17 17:09:00 (CST-6)
Location: TOMAH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mph wind gust occurred in Tomah.

Thunderstorm Wind in CLARK, WISCONSIN
From 17-MAY-17 17:09:00 to 17-MAY-17 17:09:00 (CST-6)
Location: SIDNEY
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down across the southwest part of Clark County.

Hail in CLARK, WISCONSIN
From 17-MAY-17 17:45:00 to 17-MAY-17 17:45:00 (CST-6)
Location: VEEFKIND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TAYLOR, WISCONSIN
From 17-MAY-17 18:07:00 to 17-MAY-17 18:07:00 (CST-6)
Location: MEDFORD
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down west of Medford.

Thunderstorm Wind in CLARK, WISCONSIN
From 17-MAY-17 18:00:00 to 17-MAY-17 18:00:00 (CST-6)
Location: ABBOTSFORD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

An estimated 60 mph wind gust occurred just north of Abbotsford.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:10:00 to 17-MAY-17 18:10:00 (CST-6)
Location: GLENHAVEN
Magnitude: 61.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An estimated 70 mph wind gust occurred in Glen Haven that blew down a machine shed.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:10:00 to 17-MAY-17 18:10:00 (CST-6)
Location: CASSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mph wind gust occurred in Cassville.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:19:00 to 17-MAY-17 18:19:00 (CST-6)
Location: PATCH GROVE
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An 80 mph wind gust occurred in Patch Grove.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:20:00 to 17-MAY-17 18:20:00 (CST-6)
Location: BRODTVILLE
Magnitude: 54.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 62 mph wind gust occurred near Bridgeport that blew down trees and power lines.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:24:00 to 17-MAY-17 18:24:00 (CST-6)
Location: LANCASTER
Magnitude: 61.00 EG
Property damage: 175.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An estimated 70 mph wind gust occurred in Lancaster. Several barns and outbuildings were blown down and destroyed across the southwest half of Grant County as the line storms moved across. Lots of power lines were also down.

Thunderstorm Wind in RICHLAND, WISCONSIN
From 17-MAY-17 18:45:00 to 17-MAY-17 18:45:00 (CST-6)
Location: EXCELSIOR
Magnitude: 45.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Trees and power lines were blown down northwest of Port Andrews.

Thunderstorm Wind in VERNON, WISCONSIN
From 17-MAY-17 18:51:00 to 17-MAY-17 18:51:00 (CST-6)
Location: READSTOWN
Magnitude: 42.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down over the southeast part of Vernon County.

Thunderstorm Wind in RICHLAND, WISCONSIN
From 17-MAY-17 19:07:00 to 17-MAY-17 19:07:00 (CST-6)
Location: VIOLA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An estimated 65 mph wind gust occurred in Viola.

Thunderstorm Wind in VERNON, WISCONSIN
From 17-MAY-17 19:12:00 to 17-MAY-17 19:12:00 (CST-6)
Location: GREEN WOOD
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 65 mph wind gust occurred north of Yuba.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 19:17:00 to 17-MAY-17 19:17:00 (CST-6)
Location: MELVINA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 60 mph wind gust occurred in Melvina.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 17-MAY-17 19:37:00 to 17-MAY-17 19:37:00 (CST-6)
Location: HUSTLER
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down in Hustler.

Thunderstorm Wind in JUNEAU, WISCONSIN
From 17-MAY-17 19:35:00 to 17-MAY-17 19:35:00 (CST-6)
Location: MAUSTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees and power lines were blown down in Mauston.

Thunderstorm Wind in ADAMS, WISCONSIN
From 17-MAY-17 19:43:00 to 17-MAY-17 19:43:00 (CST-6)
Location: BROOKS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down in Easton.

Hail in ADAMS, WISCONSIN
From 17-MAY-17 20:05:00 to 17-MAY-17 20:05:00 (CST-6)
Location: BIG FLATS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JUNEAU, WISCONSIN
From 17-MAY-17 19:30:00 to 17-MAY-17 19:30:00 (CST-6)
Location: MAUSTON
Magnitude: 45.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

A barn was destroyed south of Mauston.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 17:07:00 to 17-MAY-17 17:07:00 (CST-6)
Location: TOMAH
Magnitude: 60.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Several large trees were blown down in Tomah.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 16:42:00 to 17-MAY-17 16:42:00 (CST-6)
Location: SPARTA
Magnitude: 40.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Several large trees were blown down in Sparta.

Tornado in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:21:00 to 17-MAY-17 16:25:00 (CST-6)
Location: BUTMAN CORNERS
Tornado F-scale: EF1
Property damage: 60.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF-1 tornado moved across far southeast Trempealeau County and damaged trees and farm buildings. One barn was destroyed, part of a metal roof was taken off an outbuilding and a tree was knocked over onto the roof of a mobile home.

Thunderstorm Wind in VERNON, WISCONSIN
From 17-MAY-17 18:45:00 to 17-MAY-17 18:45:00 (CST-6)
Location: WEST PRAIRIE
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Public

A barn was destroyed when it was blown off its foundation west of Liberty Pole.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:19:00 to 17-MAY-17 16:19:00 (CST-6)
Location: BUTMAN CORNERS
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A farm outbuilding was destroyed west of Galesville.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:20:00 to 17-MAY-17 16:20:00 (CST-6)
Location: BUTMAN CORNERS
Magnitude: 53.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A section of a large barn was destroyed east of Galesville. Part of the destroyed roof was blown about a quarter mile away.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:22:00 to 17-MAY-17 16:22:00 (CST-6)
Location: BUTMAN CORNERS
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

East of Galesville, a large metal grain bin was flattened and moved several hundred yards.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 17-MAY-17 16:26:00 to 17-MAY-17 16:26:00 (CST-6)
Location: BUTMAN CORNERS
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

East of Galesville, a portion of a large tree was blown down. As the tree came down, it damaged the roof of a house.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 17-MAY-17 16:06:00 to 17-MAY-17 16:06:00 (CST-6)
Location: MIDWAY
Magnitude: 45.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A roof was blown off a garage in Midway.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 17-MAY-17 19:18:00 to 17-MAY-17 19:20:00 (CST-6)
Location: WEST SALEM
Magnitude: 57.00 EG
Property damage: 70.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A path of straight line wind damage was found from the east of Lake Neshonoc to northwest of Bangor. Approximately 250 trees were damaged or uprooted, a barn was destroyed, another barn lost part of its roof and there was minor damage to a house and garage.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 17:10:00 to 17-MAY-17 17:10:00 (CST-6)
Location: TOMAH
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

An estimated 65 mph wind gust occurred on the west side of Tomah that damaged signs near the fairgrounds.

Thunderstorm Wind in VERNON, WISCONSIN
From 17-MAY-17 18:48:00 to 17-MAY-17 18:48:00 (CST-6)
Location: WEST PRAIRIE
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees were blown down southwest of Viroqua. Some of these trees landed on houses.

Thunderstorm Wind in CRAWFORD, WISCONSIN
From 17-MAY-17 18:20:00 to 17-MAY-17 18:20:00 (CST-6)
Location: PRAIRIE DU CHIEN
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees were blown down on the north side of Prairie du Chien. Some of these trees landed on houses and cars. Some roof damage also occurred in the strong winds.

Thunderstorm Wind in CRAWFORD, WISCONSIN
From 17-MAY-17 18:24:00 to 17-MAY-17 18:24:00 (CST-6)
Location: PRAIRIE DU CHIEN
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A couple of machine sheds were blown down north of Prairie du Chien.

Flood in TREMPEALEAU, WISCONSIN
From 17-MAY-17 14:05:00 to 19-MAY-17 17:35:00 (CST-6)
Location: DEWEY CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Trempealeau River out of its banks in Arcadia. The river crested a foot and a half above the flood state at 9.5 feet.

Hail in MONROE, WISCONSIN
From 17-MAY-17 16:45:00 to 17-MAY-17 16:45:00 (CST-6)
Location: SPARTA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in TREMPEALEAU, WISCONSIN
From 18-MAY-17 10:00:00 to 25-MAY-17 23:00:00 (CST-6)
Location: PINE CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Trempealeau River out of its banks in Dodge. The river crested almost three feet above the flood stage at 11.98 feet.

Flood in JACKSON, WISCONSIN
From 18-MAY-17 00:10:00 to 19-MAY-17 20:20:00 (CST-6)
Location: VAUDREUIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Black River out of its banks in Black River Falls. The river crested almost three feet above the flood stage at 49.73 feet.

Flood in TREMPEALEAU, WISCONSIN
From 19-MAY-17 19:15:00 to 22-MAY-17 00:55:00 (CST-6)
Location: BUTMAN CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Black River out of its banks near Galesville. The river crested almost a foot and a half above the flood stage at 13.39 feet.

Flood in JUNEAU, WISCONSIN
From 20-MAY-17 14:20:00 to 23-MAY-17 02:05:00 (CST-6)
Location: NECEDAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains pushed the Yellow River out of its banks in Necedah. The river crested around a foot and a half above the flood stage at 16.59 feet.

Flood in ADAMS, WISCONSIN
From 19-MAY-17 13:00:00 to 21-MAY-17 07:20:00 (CST-6)
Location: EASTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rains caused the operators of the Castle Rock Dam to release above normal amounts of water. The flow peaked at 36,613 cubic feet per second (cfs) and flood stage is considered to be 30,000 cfs.

Thunderstorm Wind in GRANT, WISCONSIN
From 17-MAY-17 18:31:00 to 17-MAY-17 18:31:00 (CST-6)
Location: PRESTON
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 71 mph wind gust occurred east of Stitzer.

Thunderstorm Wind in MONROE, WISCONSIN
From 17-MAY-17 16:31:00 to 17-MAY-17 16:31:00 (CST-6)
Location: PORTLAND
Magnitude: 40.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Several large trees were blown down west of Cashton.