A cold front pushed east into Wisconsin during the late afternoon and evening hours of April 10th. Severe thunderstorms developed along the cold front and produced very large hail and three tornadoes over portions of western and central Wisconsin. The hail ranged from quarter to tennis ball size and caused extensive damage to siding and cars in the southern portions of the city of La Crosse (La Crosse County). Although difficult to estimate, damage estimates from insurance companies and contractors in the area were between 20 and 30 million dollars from the one hail storm.  National Weather Service storm survey teams confirmed two EF1 tornadoes and an EF2 tornado in Juneau and Adams counties. The tornadoes uprooted trees, knocked power lines down, flipped automobiles, and damaged or destroyed homes and businesses. In Adams County, 7 homes and 3 businesses were destroyed and damage assessments exceeded three and a half million dollars.

Thunderstorm Wind in MONROE, WISCONSIN
From 10-APR-11 16:37:00 to 10-APR-11 16:37:00 (CST-6)
Location: MELVINA
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The roof was blown off a barn.

Hail in BUFFALO, WISCONSIN
From 10-APR-11 14:50:00 to 10-APR-11 14:50:00 (CST-6)
Location: NELSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONROE, WISCONSIN
From 10-APR-11 16:16:00 to 10-APR-11 16:16:00 (CST-6)
Location: SPARTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MONROE, WISCONSIN
From 10-APR-11 16:25:00 to 10-APR-11 16:25:00 (CST-6)
Location: MC COY AAF ARPT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MONROE, WISCONSIN
From 10-APR-11 16:38:00 to 10-APR-11 16:38:00 (CST-6)
Location: WARRENS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail that ranged in size from three quarters of an inch up to an inch fell from west of Tomah to Warrens.

Thunderstorm Wind in MONROE, WISCONSIN
From 10-APR-11 16:40:00 to 10-APR-11 16:40:00 (CST-6)
Location: TOMAH
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser estimated a wind gust of 70 mph in Tomah.

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:54:00 to 10-APR-11 15:54:00 (CST-6)
Location: HERRINGTON
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

Golf ball size hail fell at the National Weather Service office and damaged several vehicles.

Hail in BUFFALO, WISCONSIN
From 10-APR-11 15:13:00 to 10-APR-11 15:13:00 (CST-6)
Location: NELSON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in TAYLOR, WISCONSIN
From 10-APR-11 16:42:00 to 10-APR-11 16:42:00 (CST-6)
Location: MAPLEHURST
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MONROE, WISCONSIN
From 10-APR-11 16:40:00 to 10-APR-11 16:40:00 (CST-6)
Location: TOMAH
Magnitude: 2.50 
Property damage: 6.50M
Crop damage: 0.00K
Reported by: Storm Chaser

Hail ranging in size from a penny to tennis ball fell in Tomah.

Hail in JUNEAU, WISCONSIN
From 10-APR-11 17:18:00 to 10-APR-11 17:18:00 (CST-6)
Location: SOUTH NECEDAH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Golf ball sized hail fell in several locations east of Necedah.

Hail in TAYLOR, WISCONSIN
From 10-APR-11 17:18:00 to 10-APR-11 17:18:00 (CST-6)
Location: WHITTLESEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in BUFFALO, WISCONSIN
From 10-APR-11 15:35:00 to 10-APR-11 15:35:00 (CST-6)
Location: DODGE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUFFALO, WISCONSIN
From 10-APR-11 15:34:00 to 10-APR-11 15:34:00 (CST-6)
Location: MONDOVI
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of quarter size hail.

Hail in TREMPEALEAU, WISCONSIN
From 10-APR-11 15:37:00 to 10-APR-11 15:37:00 (CST-6)
Location: ARCADIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ADAMS, WISCONSIN
From 10-APR-11 17:23:00 to 10-APR-11 17:23:00 (CST-6)
Location: BIG FLATS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in ADAMS, WISCONSIN
From 10-APR-11 17:12:00 to 10-APR-11 17:30:00 (CST-6)
Location: CAUSEWAY
Tornado F-scale: EF2
Property damage: 3.30M
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team confirmed an EF2 tornado that tracked from approximately three miles west of Arkdale to County Road G. The tornado caused extensive damage to barns, trees, and parts of a house two miles west of Arkdale. A cement silo was knocked over as well. The tornado crossed Highway 21 north of Arkdale hitting nearby homes, irrigation systems, and hundreds of trees. A very distinct convergent pattern was noted in the trees at this location with winds estimated around 125 mph. Several more farms, homes, and trees were hit as the tornado continued toward the south side of Big Roche A Cri Lake near the small community of Cottonville.  Several cars and mobile homes were flipped or heavily damage. A lake association building on the southwest side of Big Roche A Cri Lake was completely destroyed and numerous center-pivot irrigation systems were twisted or destroyed across the county.  EF2 damage was noted as the tornado widened to nearly a half mile wide.  It crossed Highway 13 at Cottonville and gradually began to weaken hitting more seasonal homes, trees, and roof tops. The tornado dissipated south of the Colburn Wildlife area.

Hail in TREMPEALEAU, WISCONSIN
From 10-APR-11 15:42:00 to 10-APR-11 15:42:00 (CST-6)
Location: ARCADIA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, WISCONSIN
From 10-APR-11 17:30:00 to 10-APR-11 17:30:00 (CST-6)
Location: NEW ROME
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, WISCONSIN
From 10-APR-11 18:25:00 to 10-APR-11 18:27:00 (CST-6)
Location: ADAMS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to dime sized hail fell in the Adams/Friendship area.

Funnel Cloud in MONROE, WISCONSIN
From 10-APR-11 16:36:00 to 10-APR-11 16:36:00 (CST-6)
Location: OAKDALE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A possible funnel cloud was sighted three miles southwest of Oakdale.

Thunderstorm Wind in CLARK, WISCONSIN
From 10-APR-11 16:35:00 to 10-APR-11 16:35:00 (CST-6)
Location: WITHEE
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The emergency manager reported power lines down in two locations in the township of Hixon.

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:53:00 to 10-APR-11 15:53:00 (CST-6)
Location: CALVERT
Magnitude: 2.00 
Property damage: 20.00M
Crop damage: 0.00K
Reported by: Amateur Radio

Hundreds of homes received roof and siding damage as well as broken windows on the south side of La Crosse. Wal Mart department store reported approximately 20 sky lights broken. Hundreds of cars were also damaged with dents and broken windows and mirrors.  There were several thousand claims made to major insurance companies in and around the La Crosse area.

Tornado in ADAMS, WISCONSIN
From 10-APR-11 17:30:00 to 10-APR-11 17:35:00 (CST-6)
Location: BIG FLATS
Tornado F-scale: EF1
Property damage: 426.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A National Weather Service storm survey team confirmed that a second tornado formed near County Road G and Buttercup Ave. north of where the Arkdale to Cottonville tornado dissipated. EF1 damage was noted to some homes and trees, especially along Buttercup Ave. as the tornado tracked into Waushara County. Several center-post irrigation systems were destroyed along with some roof damage to homes and power poles.

Tornado in JUNEAU, WISCONSIN
From 10-APR-11 17:14:00 to 10-APR-11 17:21:00 (CST-6)
Location: SOUTH NECEDAH
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team confirmed an EF1 tornado south of Necedah. The tornado first touched down near the intersection of Paradise Lane and 25th Street and produced EF0 damage. The tornado briefly produced EF1 damage for about three fourths of a mile from T Lane through Padre Pio Drive. A mobile home was rolled over and pine trees were snapped. The tornado continued east-northeast and produced EF0 damage to pine trees around County Road G before ending near the Wisconsin River.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 10-APR-11 15:58:00 to 10-APR-11 15:58:00 (CST-6)
Location: OSSEO
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service storm survey team reported trees blown down in Osseo. One of the large trees partially fell on a house. A trained spotter reported broken windows and cars dented due to wind blown debris.

Flood in JACKSON, WISCONSIN
From 10-APR-11 07:50:00 to 12-APR-11 20:00:00 (CST-6)
Location: VAUDREUIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Two day rainfall amounts of 1 to 2 inches across central Wisconsin produced a period of flooding along the Black River in Black River Falls. The river exceeded the flood stage from the 10th into the 12th. The river crested over four feet above the flood stage at 51.6 feet.

Flood in TREMPEALEAU, WISCONSIN
From 11-APR-11 19:30:00 to 14-APR-11 17:30:00 (CST-6)
Location: BUTMAN CORNERS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Two day rainfall amounts of 1 to 2 inches across western and central Wisconsin produced a period of flooding along the Black River near Galesville. The river exceeded the flood stage from the 11th into the 14th. The river crested over a foot and a half  above the flood stage at 13.6 feet on the 12th.

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:55:00 to 10-APR-11 15:55:00 (CST-6)
Location: HERRINGTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball size hail fell at the intersection of U.S. Highway 14 and County Road MM.

Hail in TREMPEALEAU, WISCONSIN
From 10-APR-11 15:54:00 to 10-APR-11 15:54:00 (CST-6)
Location: HALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:51:00 to 10-APR-11 15:52:00 (CST-6)
Location: LA CROSSE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter to half dollar sized hail fell on the south side of La Crosse.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 10-APR-11 15:51:00 to 10-APR-11 15:51:00 (CST-6)
Location: LA CROSSE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators estimated a wind gust of 60 mph.

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:59:00 to 10-APR-11 15:59:00 (CST-6)
Location: WEST SALEM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in LA CROSSE, WISCONSIN
From 10-APR-11 15:53:00 to 10-APR-11 15:53:00 (CST-6)
Location: CALVERT
Magnitude: 2.50 
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MONROE, WISCONSIN
From 10-APR-11 16:30:00 to 10-APR-11 16:30:00 (CST-6)
Location: TOMAH
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in VERNON, WISCONSIN
From 10-APR-11 16:10:00 to 10-APR-11 16:10:00 (CST-6)
Location: GENOA
Magnitude: 56.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Law Enforcement

Power lines were blown down on Mound Ridge Road.