A line of severe thunderstorms moved into and across parts of western Wisconsin during the late evening hours on May 2nd and produced damaging winds and large hail. Emergency management in Buffalo, Trempealeau and Jackson Counties reported trees,  power lines, homes and roofs damaged along with power outages. The worst wind and hail damage occurred in the community of Blair, WI (Trempealeau County) where virtually every structure was either damaged or completely destroyed. The Blair-Taylor High School roof received major damage and a 25 to 30 unit mobile home park was evacuated after several homes were moved off their foundations rupturing natural gas lines.  A power outage in Blair lasted up to 16 hours.

Thunderstorm Wind in BUFFALO, WISCONSIN
From 02-MAY-12 20:31:00 to 02-MAY-12 20:31:00 (CST-6)
Location: ALMA
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were blown down and power outages occurred in Alma. In addition, one inch hail covered the ground, damaged vehicles and a cracked at least one windshield.

Hail in TREMPEALEAU, WISCONSIN
From 02-MAY-12 21:05:00 to 02-MAY-12 21:05:00 (CST-6)
Location: ARCADIA ARPT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in TREMPEALEAU, WISCONSIN
From 02-MAY-12 20:49:00 to 02-MAY-12 20:49:00 (CST-6)
Location: STRUM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Pea to quarter size hail covered the ground in Strum.

Thunderstorm Wind in JACKSON, WISCONSIN
From 02-MAY-12 21:38:00 to 02-MAY-12 21:38:00 (CST-6)
Location: TAYLOR
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees were blown down and power outages occurred in Taylor.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-MAY-12 21:27:00 to 02-MAY-12 21:29:00 (CST-6)
Location: BLAIR
Magnitude: 65.00 EG
Property damage: 3.50M
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms impacted the central portion of Trempealeau County near and in Blair.  Nearly every structure in Blair was either damaged or destroyed by the hail or wind, with broken windows, siding or roof damage. The Blair-Taylor high and elementary schools suffered major damage to their roofs. A 25 to 30 unit mobile home park was evacuated after several mobile homes were moved off their foundations and ruptured natural gas lines. Numerous trees and power lines were blown down with power outages lasting up to 16 hours.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-MAY-12 21:17:00 to 02-MAY-12 21:17:00 (CST-6)
Location: WHITEHALL
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees and power lines were blown down in Whitehall.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-MAY-12 21:03:00 to 02-MAY-12 21:03:00 (CST-6)
Location: ARCADIA
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several mobile homes and trees were damaged in Arcadia.

Thunderstorm Wind in TREMPEALEAU, WISCONSIN
From 02-MAY-12 21:13:00 to 02-MAY-12 21:31:00 (CST-6)
Location: INDEPENDENCE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 173.00K
Reported by: Newspaper

A severe thunderstorm that tracked across central Trempealeau County caused crop damage to around 150 farms. Around 2000 acres of alfalfa were destroyed along with almost 1100 acres of corn. Most farmers were able to replant the lost corn acres.

Flood in JACKSON, WISCONSIN
From 07-MAY-12 02:30:00 to 07-MAY-12 05:30:00 (CST-6)
Location: VAUDREUIL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Heavy rains pushed the Black River out of its banks in Black River Falls. The river crested about a half foot above the flood stage during the early morning of May 7th.