A large complex of thunderstorms, mainly consisting of very heavy rain and damaging winds, raked through most of southern Wisconsin during the early morning hours.  This was round number one for the day.  Flash flooding was the main threat due to recent heavy rain and saturated ground.  This flash flooding mainly affected south-central Wisconsin consisting of Dane, Sauk, Iowa, Lafayette, and Green counties.  Lafayette and Green counties were hit especially hard.  Flash flooding in Benton (Lafayette County) caused people to be evacuated from their homes.  100,000 dollars in costs resulted from flood damage.  Flash flooding in Darlington (Lafayette County) caused mudslides to occur in farmers fields (destroying recently planted crops) and caused basements to flood, causing another 75,000 dollars in damage.  Flash flooding in Marquette, Sauk, western Dane, and Iron counties consisted of gravel washouts, mudslides, and basement damage.  In addition, flash flood rains forced a roof of a building to collapse, and basement/foundation damage was inflicted on an apartment complex.  Damaging winds of 50 to 56 knots (58 to 65 mph) was the result from a small line of severe thunderstorms which produced scattered areas of tree damage form Lafayette County through Walworth County.  Northeast of Lake Geneva, powerful thunderstorm winds blew a pole shed down and snapped power lines.  Trees and power lines were reported down in Blanchardville, New Glarus, and Lake Geneva.  Refer to the Green Lake County May 25th flood event for additional information.

Thunderstorm Wind in ROCK, WISCONSIN
From 23-MAY-04 04:10:00 to 23-MAY-04 04:10:00 (CST)
Location: MILTON
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in IOWA, WISCONSIN
From 22-MAY-04 23:05:00 to 22-MAY-04 23:05:00 (CST)
Location: BLANCHARDVILLE
Magnitude: 56 EG
Reported by: LAW ENFORCEMENT

Flash Flood in LAFAYETTE, WISCONSIN
From 22-MAY-04 23:30:00 to 23-MAY-04 03:00:00 (CST)
Location: BENTON
Property damage: 100K
Crop damage: 200K
Reported by: LAW ENFORCEMENT

Several reports of houses flooded, people evacuated, mudslides destroyed freshly planted crops.

Flash Flood in LAFAYETTE, WISCONSIN
From 22-MAY-04 23:45:00 to 23-MAY-04 03:00:00 (CST)
Location: DARLINGTON
Reported by: GENERAL PUBLIC

Hail in DANE, WISCONSIN
From 23-MAY-04 00:31:00 to 23-MAY-04 00:31:00 (CST)
Location: PAOLI
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Hail in DANE, WISCONSIN
From 23-MAY-04 00:45:00 to 23-MAY-04 00:45:00 (CST)
Location: STOUGHTON
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Flash Flood in MARQUETTE, WISCONSIN
From 23-MAY-04 03:00:00 to 23-MAY-04 06:30:00 (CST)
Location: PACKWAUKEE
Property damage: 50K
Crop damage: 200K
Reported by: NEWSPAPER

Flash Flood in DANE, WISCONSIN
From 23-MAY-04 03:30:00 to 23-MAY-04 06:30:00 (CST)
Location: FITCHBURG
Property damage: 200K
Reported by: NEWSPAPER

Flash Flood in SAUK, WISCONSIN
From 23-MAY-04 00:45:00 to 23-MAY-04 04:00:00 (CST)
Location: PLAIN
Property damage: 150K
Crop damage: 300K
Reported by: LAW ENFORCEMENT

Flash Flood in GREEN, WISCONSIN
From 23-MAY-04 00:30:00 to 23-MAY-04 03:00:00 (CST)
Location: NEW GLARUS
Property damage: 100K
Crop damage: 200K
Reported by: LAW ENFORCEMENT

A mudslide destroyed freshly planted crops and some basements were flooded.

Flash Flood in DANE, WISCONSIN
From 23-MAY-04 01:00:00 to 23-MAY-04 04:00:00 (CST)
Location: BLUE MOUNDS
Property damage: 100K
Crop damage: 300K
Reported by: LAW ENFORCEMENT

Flash Flood in IOWA, WISCONSIN
From 23-MAY-04 02:00:00 to 23-MAY-04 04:00:00 (CST)
Location: HIGHLAND
Property damage: 100K
Crop damage: 300K
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WALWORTH, WISCONSIN
From 23-MAY-04 04:40:00 to 23-MAY-04 04:40:00 (CST)
Location: LAKE GENEVA
Magnitude: 65 EG
Property damage: 50K
Reported by: NEWSPAPER

Hail in GREEN, WISCONSIN
From 23-MAY-04 00:05:00 to 23-MAY-04 00:05:00 (CST)
Location: NEW GLARUS
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in GREEN, WISCONSIN
From 23-MAY-04 00:05:00 to 23-MAY-04 00:05:00 (CST)
Location: NEW GLARUS
Magnitude: 52 EG
Property damage: 25K
Reported by: LAW ENFORCEMENT