A warm front had stalled over southern Wisconsin with repeated rounds of strong to severe thunderstorms and heavy rainfall. There was some flash flooding in southeast Wisconsin.

Hail in MILWAUKEE, WISCONSIN
From 12-MAY-14 18:40:00 to 12-MAY-14 18:40:00 (CST-6)
Location: STATE FAIR PARK
Magnitude: 0.75 
Reported by: Amateur Radio

Hail in MILWAUKEE, WISCONSIN
From 12-MAY-14 18:48:00 to 12-MAY-14 18:48:00 (CST-6)
Location: WAUWATOSA
Magnitude: 2.00 
Reported by: Trained Spotter

The large hail resulted in broken windows, dented vehicles, and extensive damage to trees and shrubs.

Hail in MILWAUKEE, WISCONSIN
From 12-MAY-14 18:55:00 to 12-MAY-14 18:55:00 (CST-6)
Location: MITCHELL PARK DOMES
Magnitude: 0.75 
Reported by: Broadcast Media

Heavy Rain in WAUKESHA, WISCONSIN
From 12-MAY-14 11:30:00 to 12-MAY-14 11:30:00 (CST-6)
Location: DOWNTOWN WAUKESHA
Reported by: Emergency Manager

General street flooding throughout the city of Waukesha.

Heavy Rain in WALWORTH, WISCONSIN
From 12-MAY-14 15:39:00 to 12-MAY-14 15:39:00 (CST-6)
Location: ELKHORN ARPT
Reported by: Amateur Radio

Minor road flooding.

Heavy Rain in JEFFERSON, WISCONSIN
From 12-MAY-14 16:45:00 to 12-MAY-14 18:15:00 (CST-6)
Location: FT ATKINSON
Reported by: Trained Spotter

Sewer overflows and street flooding in Fort Atkinson and Jefferson. Low lying streets flooded as well as runoff from farm fields flowing over roadways in rural areas.  Numerous garbage cans were overturned in Fort Atkinson resulting in bags of trash floating in the water.

Heavy Rain in KENOSHA, WISCONSIN
From 12-MAY-14 19:40:00 to 12-MAY-14 19:40:00 (CST-6)
Location: CAROL BEACH
Crop damage: 0.00K
Reported by: Amateur Radio

Minor street flooding at the 1900 block of 91st Street. Also, the right lane of Sheridan Road was flooded.

Heavy Rain in JEFFERSON, WISCONSIN
From 12-MAY-14 21:09:00 to 12-MAY-14 21:09:00 (CST-6)
Location: COLD SPG
Reported by: Law Enforcement

Flooding near the intersection of Highway U and N as water flowed across the road as it came off the farm field. Depth of water was about 4 inches.

Flash Flood in RACINE, WISCONSIN
From 12-MAY-14 21:25:00 to 12-MAY-14 22:00:00 (CST-6)
Location: BOHNERS LAKE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A strong current of water and mud flowed from a farm field onto Schaal Road. Afterward, the highway department removed five truck loads of mud.

Flash Flood in KENOSHA, WISCONSIN
From 12-MAY-14 19:45:00 to 12-MAY-14 21:30:00 (CST-6)
Location: BRIGHTON
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A portion of highway BB was washed out due to the heavy rainfall.

Flash Flood in KENOSHA, WISCONSIN
From 12-MAY-14 21:45:00 to 12-MAY-14 22:45:00 (CST-6)
Location: PARIS
Flood cause: Heavy Rain
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Highway 45 was flooded and closed. A man was rescued from the top of his vehicle with the water up to the windows.

Thunderstorm Wind in ROCK, WISCONSIN
From 12-MAY-14 11:09:00 to 12-MAY-14 11:09:00 (CST-6)
Location: DOWNTOWN JANESVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Law Enforcement

Multiple trees down in Janesville from straight line winds of a passing squall line.

Thunderstorm Wind in JEFFERSON, WISCONSIN
From 12-MAY-14 11:09:00 to 12-MAY-14 11:09:00 (CST-6)
Location: WATERTOWN
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees and powerlines down throughout Watertown. The combination of winds and heavy rains caused an old brick building to partially collapse.

Thunderstorm Wind in RACINE, WISCONSIN
From 12-MAY-14 16:00:00 to 12-MAY-14 16:00:00 (CST-6)
Location: BOHNERS LAKE
Magnitude: 61.00 EG
Property damage: 30.00K
Reported by: Fire Department/Rescue

A concentrated area of large trees down on and near to Mc Henry Drive. Many of the large trees were rotted or had shallow roots. Trees landed on an above ground swimming pool, a chain link fence, a pickup truck, and a roof of a home. A barn was also damaged by the high winds.

Thunderstorm Wind in RACINE, WISCONSIN
From 12-MAY-14 16:16:00 to 12-MAY-14 16:16:00 (CST-6)
Location: BURLINGTON
Magnitude: 50.00 EG
Property damage: 2.00K
Reported by: Emergency Manager

Several trees down on power lines and cars.

Thunderstorm Wind in RACINE, WISCONSIN
From 12-MAY-14 18:14:00 to 12-MAY-14 18:14:00 (CST-6)
Location: STURTEVANT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A boat was overturned from a thunderstorm wind gust.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 12-MAY-14 18:25:00 to 12-MAY-14 18:25:00 (CST-6)
Location: DOUSMAN
Magnitude: 58.00 EG
Property damage: 2.00K
Reported by: Public

Multiple trees down on highway 67 and Road X. Additional trees down near highway 67 and Highway ZZ.

Thunderstorm Wind in MILWAUKEE, WISCONSIN
From 12-MAY-14 18:48:00 to 12-MAY-14 18:48:00 (CST-6)
Location: WAUWATOSA
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

Strong winds with an intensifying storm over Milwaukee County.

Thunderstorm Wind in ROCK, WISCONSIN
From 12-MAY-14 19:48:00 to 12-MAY-14 19:48:00 (CST-6)
Location: BELOIT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Sporadic trees and power lines down.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 12-MAY-14 19:48:00 to 12-MAY-14 19:48:00 (CST-6)
Location: DOUSMAN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees down near highway 67 in the village of Eagle and the town of Ottawa.

Flash Flood in WAUKESHA, WISCONSIN
From 12-MAY-14 20:50:00 to 12-MAY-14 22:35:00 (CST-6)
Location: BETHESDA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

According to the river gauge in Waukesha, the Fox River rose quickly and went into minor flood stage during this period due to heavy rains of 3 to 4 inches mainly in the evening hours. The river was observed out of its banks near the cross streets of Moreland Boulevard and Madison Street, and there was some flooding in the backyards of homes.

Flash Flood in WAUKESHA, WISCONSIN
From 12-MAY-14 18:55:00 to 12-MAY-14 19:25:00 (CST-6)
Location: ELM GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Two feet of water at the intersection of Ponoma Road and Clearwater Drive along with urban street flooding throughout the area.

Flash Flood in MILWAUKEE, WISCONSIN
From 12-MAY-14 19:05:00 to 12-MAY-14 20:00:00 (CST-6)
Location: BUTLER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The two right lanes of southbound highway 45 closed at Center Street to due to flash flooding.

Hail in DODGE, WISCONSIN
From 12-MAY-14 10:28:00 to 12-MAY-14 10:28:00 (CST-6)
Location: LOMIRA
Magnitude: 0.75 
Reported by: Law Enforcement

Hail in ROCK, WISCONSIN
From 12-MAY-14 10:34:00 to 12-MAY-14 10:34:00 (CST-6)
Location: EDGERTON
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in DODGE, WISCONSIN
From 12-MAY-14 10:37:00 to 12-MAY-14 10:37:00 (CST-6)
Location: HUSTISFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ROCK, WISCONSIN
From 12-MAY-14 14:18:00 to 12-MAY-14 14:22:00 (CST-6)
Location: BELOIT
Magnitude: 1.75 
Reported by: Law Enforcement

Storm spotters and law enforcement reported hail ranging from 1 to 1.75 inches in diameter.

Hail in WALWORTH, WISCONSIN
From 12-MAY-14 15:18:00 to 12-MAY-14 15:18:00 (CST-6)
Location: DELAVAN ARPT
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in WALWORTH, WISCONSIN
From 12-MAY-14 15:25:00 to 12-MAY-14 15:25:00 (CST-6)
Location: ELKHORN
Magnitude: 1.50 
Reported by: Trained Spotter

Ping pong sized hail damaged 400 cars at an automobile dealer.

Hail in JEFFERSON, WISCONSIN
From 12-MAY-14 15:43:00 to 12-MAY-14 15:43:00 (CST-6)
Location: COLD SPG
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in RACINE, WISCONSIN
From 12-MAY-14 15:51:00 to 12-MAY-14 15:51:00 (CST-6)
Location: BOHNERS LAKE
Magnitude: 2.00 
Reported by: Amateur Radio

Hail in RACINE, WISCONSIN
From 12-MAY-14 16:10:00 to 12-MAY-14 16:10:00 (CST-6)
Location: UNION GROVE
Magnitude: 0.88 
Reported by: 911 Call Center

Hail in RACINE, WISCONSIN
From 12-MAY-14 16:18:00 to 12-MAY-14 16:18:00 (CST-6)
Location: BOHNERS LAKE
Magnitude: 2.00 
Reported by: Amateur Radio

Hail in RACINE, WISCONSIN
From 12-MAY-14 18:00:00 to 12-MAY-14 18:00:00 (CST-6)
Location: IVES
Magnitude: 0.75 
Reported by: Trained Spotter

Hail in RACINE, WISCONSIN
From 12-MAY-14 18:19:00 to 12-MAY-14 18:19:00 (CST-6)
Location: STURTEVANT
Magnitude: 1.25 
Reported by: Law Enforcement

Hail in RACINE, WISCONSIN
From 12-MAY-14 18:20:00 to 12-MAY-14 18:20:00 (CST-6)
Location: GATLIFF
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in RACINE, WISCONSIN
From 12-MAY-14 18:29:00 to 12-MAY-14 18:29:00 (CST-6)
Location: DOWNTOWN RACINE
Magnitude: 2.50 
Reported by: Public

Hail ranged from 1 to 2.50 inches in diameter throughout various parts of Racine.

Hail in JEFFERSON, WISCONSIN
From 12-MAY-14 15:35:00 to 12-MAY-14 15:39:00 (CST-6)
Location: FT ATKINSON
Magnitude: 1.75 
Reported by: Amateur Radio

Hail diameter ranged from 1 to 1.75 inches.

Hail in RACINE, WISCONSIN
From 12-MAY-14 18:25:00 to 12-MAY-14 18:25:00 (CST-6)
Location: DOWNTOWN RACINE
Magnitude: 1.50 
Reported by: Trained Spotter

Heavy Rain in WALWORTH, WISCONSIN
From 12-MAY-14 15:26:00 to 12-MAY-14 15:26:00 (CST-6)
Location: ELKHORN
Reported by: Amateur Radio

Heavy rain causing minor street flooding.