On July 18th, a nearly stationary cold front extended across northern Wisconsin into central Minnesota. Not long after sunrise, a small complex of thunderstorms developed over eastern Minnesota ahead of the cold front. As these storms move southeast into western Wisconsin they produced large hail, damaging winds and localized flooding over parts of Trempealeau, Jackson and Monroe Counties.

Hail in TREMPEALEAU, WISCONSIN
From 18-JUL-11 08:06:00 to 18-JUL-11 08:06:00 (CST-6)
Location: IDUNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Golf ball sized hail fell halfway between Arcadia and Blair.

Flood in TREMPEALEAU, WISCONSIN
From 18-JUL-11 07:30:00 to 18-JUL-11 08:30:00 (CST-6)
Location: BLAIR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain caused water to cover State Highway 95 and County Road S for a short period.

Thunderstorm Wind in MONROE, WISCONSIN
From 18-JUL-11 07:32:00 to 18-JUL-11 07:32:00 (CST-6)
Location: CATARACT
Magnitude: 55.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A barn was shifted about 10 inches off its foundation, a large hay shed had the roof and three walls ripped off and farm trailers were moved or flipped by the strong winds at a dairy farm. Also, numerous trees were blown down along Amber Road.

Flash Flood in JACKSON, WISCONSIN
From 18-JUL-11 09:30:00 to 18-JUL-11 11:30:00 (CST-6)
Location: TAYLOR HALVERSON ARP
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Between 2.5 and 4 inches of rain fell in and around Taylor. This produced some flash flooding along Skutley Creek that washed out portions of Company Road. Flooding also occurred along French Creek causing water to go over French Creek Road. A culvert failed, washing out a portion of Lien Road near the intersection with County Road C. The high water forced the closure of three roads in the southeast part of the county.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 07:19:00 to 18-JUL-11 07:19:00 (CST-6)
Location: IRVING
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down near Irving.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 05:45:00 to 18-JUL-11 05:45:00 (CST-6)
Location: NORTHFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few large trees were blown down that blocked a road near Northfield.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 06:56:00 to 18-JUL-11 06:56:00 (CST-6)
Location: DISCO
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

Several trees were blown down on a farm east of Disco.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 07:17:00 to 18-JUL-11 07:17:00 (CST-6)
Location: IRVING
Magnitude: 50.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Newspaper

Farms in the rural Town of Irving lost some livestock sheds and had outbuildings damaged. Several fields of corn were also flattened but it was thought that most of the corn would recover with little crop loss.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 07:21:00 to 18-JUL-11 07:21:00 (CST-6)
Location: FALL HALL GLEN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Newspaper

A cabin at the Wisconsin Christian Youth Camp was damaged by strong thunderstorm winds.

Thunderstorm Wind in JACKSON, WISCONSIN
From 18-JUL-11 08:05:00 to 18-JUL-11 08:05:00 (CST-6)
Location: FRANKLIN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A road was blocked in Franklin by a few large trees that were blown down.