Thunderstorms developed along a cold front and brought very heavy rain to parts of southwest Wisconsin on July 23rd and 24th. This heavy rain created flooding problems that likely caused around a million dollars of damage in Grant County alone. Damaging winds from these thunderstorms downed lots of trees, some of which landed on homes and vehicles.

Heavy Rain in GRANT, WISCONSIN
From 23-JUL-10 21:45:00 to 24-JUL-10 01:15:00 (CST-6)
Location: ROCKVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated mesonet weather system measured 4.53 inches of rain in 3.5 hours. 2.82 inches of the total fell in one hour.

Heavy Rain in GRANT, WISCONSIN
From 23-JUL-10 21:45:00 to 24-JUL-10 01:15:00 (CST-6)
Location: BURTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

An automated mesonet weather system measured 3.28 inches of rain in 3.5 hours. 2.07 inches of the total fell in one hour.

Flash Flood in GRANT, WISCONSIN
From 24-JUL-10 00:48:00 to 24-JUL-10 05:00:00 (CST-6)
Location: DICKEYVILLE
Flood cause: Heavy Rain
Property damage: 7.50K
Crop damage: 0.00K
Reported by: Emergency Manager

A new 20 foot bridge on Indian Creek Road about 2 miles west of the town of Dickeyville was washed out. Also, significant flooding was reported in the town of Dickeyville.

Flood in GRANT, WISCONSIN
From 24-JUL-10 01:18:00 to 24-JUL-10 14:30:00 (CST-6)
Location: PLATTEVILLE
Flood cause: Heavy Rain
Property damage: 1.25M
Crop damage: 0.00K
Reported by: Emergency Manager

The Grant County Emergency Manager reported that U.S. Highway 151 was closed at the SW Road interchange. County Road B was also closed for a while. County Road O sustained substantial damage and was likely closed for around a week. County Road U sustained shoulder damage. Water was also over SW Road near the intersection with Pioneer Road in the southwest part of the city of Platteville. Newspaper articles indicate at least 90 homes throughout the county were damaged by the flooding. Some of the homes had water at least 5 feet above ground level. A two day rainfall total of 9.25 inches was measured at 6 a.m. CST on July 24th in Dickeyville. A three day rainfall total of 8.96 inches in Rockville was measured at 6 a.m. CST July 24th.

Thunderstorm Wind in BUFFALO, WISCONSIN
From 24-JUL-10 01:40:00 to 24-JUL-10 01:40:00 (CST-6)
Location: MONDOVI
Magnitude: 52.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: COOP Observer

The COOP observer reported lots of trees and power lines down. Newspaper articles indicated that some of the fallen trees landed on houses creating roof damage and on a pickup truck smashing the roof and windshield.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 24-JUL-10 02:18:00 to 24-JUL-10 02:18:00 (CST-6)
Location: BARRE MILLS
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS employee reported a couple of trees and several large branches blown down.

Thunderstorm Wind in LA CROSSE, WISCONSIN
From 24-JUL-10 02:14:00 to 24-JUL-10 02:14:00 (CST-6)
Location: CALVERT
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operators reported some trees blown down and others snapped off. Trees and signs were also blown down on the south side of La Crosse in the Shelby Mall area.