A continuous feed of moisture, in a low to mid-level warm air advection regime, impinged along an outflow boundary draped across southern Wisconsin. This set-up fueled thunderstorms that developed, and redeveloped, along the boundary from the evening of July 14th into the early morning hours of July 15th. Flash flooding occurred in the hills of the Wisconsin River Valley, and in the urban areas of Waukesha and Milwaukee counties, where more than 4 inches of rain fell from the evening into the overnight hours.

Flash Flood in COLUMBIA, WISCONSIN
From 15-JUL-10 01:00:00 to 15-JUL-10 03:00:00 (CST-6)
Location: LODI
Flood cause: Heavy Rain
Property damage: 60.00K
Crop damage: 10.00K
Reported by: Emergency Manager

The Columbia County Emergency Manager reported gravel shoulder wash-outs on several roads and one to two feet of water on low-lying roads from heavy rains as strong to severe thunderstorms crossed the region. Minor crop damage was also noted.

Flash Flood in SAUK, WISCONSIN
From 14-JUL-10 22:45:00 to 15-JUL-10 01:30:00 (CST-6)
Location: ROCK SPGS
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 10.00K
Reported by: Emergency Manager

The Sauk County Emergency Manager reported one to three feet of water over some roads, mainly in the northern portion of the county...with sandbagging operations in Rock Springs along the rapidly rising Baraboo River. A trained spotter reported street flooding along Highway 33 in Baraboo. The flooding was the result of heavy rains from strong to severe thunderstorms crossing the region. A farmer near La Valle lost 30 head of cattle that drowned when they left high ground into the rushing waters of the Little Baraboo River. Minor crop damage was also noted.

Thunderstorm Wind in SAUK, WISCONSIN
From 14-JUL-10 18:33:00 to 14-JUL-10 18:33:00 (CST-6)
Location: LAKE DELTON
Magnitude: 50.00 EG
Reported by: Public

The public reported a thunderstorm wind gust estimates at 50 knots (58 mph).

Thunderstorm Wind in FOND DU LAC, WISCONSIN
From 14-JUL-10 18:30:00 to 14-JUL-10 18:30:00 (CST-6)
Location: RIPON
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported trees blown down by thunderstorm wind gusts estimated at 52 knots (60 mph).

Thunderstorm Wind in DODGE, WISCONSIN
From 14-JUL-10 19:05:00 to 14-JUL-10 19:05:00 (CST-6)
Location: FOX LAKE
Magnitude: 52.00 EG
Reported by: Public

The public reported a thunderstorm wind gust estimated at 60 mph (52 knots).

Thunderstorm Wind in SHEBOYGAN, WISCONSIN
From 14-JUL-10 19:42:00 to 14-JUL-10 19:42:00 (CST-6)
Location: CASCADE
Magnitude: 52.00 EG
Reported by: Public

The public reported trees blown down by thunderstorm wind gusts estimated at 52 knots (60 mph).

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 14-JUL-10 19:53:00 to 14-JUL-10 19:53:00 (CST-6)
Location: HARTFORD
Magnitude: 52.00 EG
Property damage: 10.00K
Reported by: Emergency Manager

The emergency manager of Washington County reported trees and power lines blown down by thunderstorm wind gusts in Hartford and a few other locations in the county.

Thunderstorm Wind in COLUMBIA, WISCONSIN
From 14-JUL-10 22:00:00 to 14-JUL-10 22:18:00 (CST-6)
Location: WISCONSIN DELLS
Magnitude: 61.00 EG
Property damage: 20.00K
Reported by: Trained Spotter

A trained spotter reported trees and power lines blown down by thunderstorm wind gusts estimated at 70 mph (61 knots) along a path from the Wisconsin Dells to Portage.

Thunderstorm Wind in MARQUETTE, WISCONSIN
From 14-JUL-10 22:02:00 to 14-JUL-10 22:02:00 (CST-6)
Location: BRIGGSVILLE
Magnitude: 52.00 EG
Reported by: Fire Department/Rescue

Fire department personnel reported thunderstorm wind gusts up to an estimated 52 knots (60 mph).

Thunderstorm Wind in COLUMBIA, WISCONSIN
From 14-JUL-10 22:40:00 to 14-JUL-10 22:40:00 (CST-6)
Location: COLUMBUS
Magnitude: 56.00 EG
Reported by: Law Enforcement

Law enforcement personnel reported trees blown down by thunderstorm wind gusts estimated at 56 knots (65 mph).

Thunderstorm Wind in DODGE, WISCONSIN
From 14-JUL-10 22:58:00 to 14-JUL-10 22:58:00 (CST-6)
Location: BEAVER DAM
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter estimated thunderstorm wind gusts up to 52 knots (60 mph).

Thunderstorm Wind in DODGE, WISCONSIN
From 14-JUL-10 22:50:00 to 14-JUL-10 23:00:00 (CST-6)
Location: FOX LAKE
Magnitude: 65.00 EG
Property damage: 5.00K
Reported by: Law Enforcement

Law enforcement officials reported trees and power poles blown down by thunderstorm wind gusts estimated at 65 knots (75 mph).

Thunderstorm Wind in DODGE, WISCONSIN
From 14-JUL-10 23:22:00 to 14-JUL-10 23:22:00 (CST-6)
Location: MAYVILLE
Magnitude: 65.00 EG
Property damage: 1.00K
Reported by: Law Enforcement

Law enforcement reported a power pole snapped by strong thunderstorm wind gusts estimated up to 65 knots (75 mph).

Thunderstorm Wind in SAUK, WISCONSIN
From 14-JUL-10 23:00:00 to 14-JUL-10 23:00:00 (CST-6)
Location: LA VALLE
Magnitude: 56.00 EG
Reported by: Public

The public reported trees blown down by thunderstorm wind gusts estimated up to 56 knots (70 mph).

Thunderstorm Wind in WASHINGTON, WISCONSIN
From 14-JUL-10 23:40:00 to 14-JUL-10 23:40:00 (CST-6)
Location: SLINGER
Magnitude: 52.00 EG
Reported by: Law Enforcement

Law enforcement officials reported trees blown down by thunderstorm wind gusts estimated up to 52 knots (60 mph).

Thunderstorm Wind in SHEBOYGAN, WISCONSIN
From 14-JUL-10 23:30:00 to 14-JUL-10 23:30:00 (CST-6)
Location: GREENBUSH
Magnitude: 52.00 EG
Reported by: Law Enforcement

Law enforcement officials reported trees blown down by thunderstorm wind gusts estimated up to 52 knots (60 mph).

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 14-JUL-10 23:55:00 to 14-JUL-10 23:55:00 (CST-6)
Location: LANNON
Magnitude: 52.00 EG
Reported by: Public

The public reported trees blown down by thunderstorm wind gusts estimated up to 52 knots (60 mph).

Thunderstorm Wind in OZAUKEE, WISCONSIN
From 15-JUL-10 00:00:00 to 15-JUL-10 00:00:00 (CST-6)
Location: SAUKVILLE
Magnitude: 52.00 EG
Reported by: Law Enforcement

Law enforcement officials reported trees blown down by thunderstorm wind gusts estimated up to 52 knots (60 mph).

Flash Flood in WAUKESHA, WISCONSIN
From 15-JUL-10 00:45:00 to 15-JUL-10 03:30:00 (CST-6)
Location: ELM GROVE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain from strong to severe thunderstorms that moved across the region produced flash flooding from 3 to 4-inch rainfall that fell in only a couple of hours. All of the I-94 ramps in Brookfield were closed for a time due to high water. Water covered Sunset Drive at a railroad intersection about 1 mile southwest of Waukesha. Trained spotters reported 2 feet of water flowing through the intersection of Calhoun Rd and Beloit Rd., as well as Overland Trail near Brookfield Rd. in New Berlin.

Flash Flood in MILWAUKEE, WISCONSIN
From 15-JUL-10 00:45:00 to 15-JUL-10 03:30:00 (CST-6)
Location: MILWAUKEE INTERNATIONAL AIRPORT
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Heavy rain from strong to severe thunderstorms produced 3 to 4 inch rainfall amounts in only a couple of hours. Flash flooding from the heavy rain flooded basements in West Allis; blocked the east-bound lanes of Greenfield Avenue between 116th St. and 124th St.; blocked 82nd St. and 83rd St. near Orchard St. with two to three feet of water over the roads that stalled cars; made I-794 at the south end of the Hoan Bridge impassable due to high water over the roadway; and quickly filled the 2500 block of N. Humboldt Ave. with 2 feet of water.

Lightning in WASHINGTON, WISCONSIN
From 14-JUL-10 23:20:00 to 14-JUL-10 23:30:00 (CST-6)
Location: WEST BEND
Property damage: 20.00K
Reported by: Fire Department/Rescue

The West Bend Fire Department responded to four calls for trees on fire due to lightning strikes and power line damage due to lightning strikes, including near the intersection of CTH NN and Scenic Rd. in West Bend.