Flash flooding occurred ahead of a cold front that moved southeast into a warm and unstable air mass.  Early storms produced large hail and some wind damage before an east to west boundary formed in the Appleton area, providing the focus for training thunderstorms and flooding.  The highest measured rainfall was 6.50 inches in Darboy (Calumet co.) including 3 inches in one hour.Heavy rain resulted in flash flooding that left 2 to 3 feet of water over many roads.  Water reached the doorsteps of homes in Menasha (Winnebago co.) and mail boxes in Darboy (Calumet co.).  Manhole covers popped off on streets in the Green Bay area (Brown co.) and Appleton (Outagamie co.).  A mall in downtown Green Bay had to be evacuated as water started to flow into the lower levels from the street.  A bridge over the Fox River in Neenah (Outagamie co.) had to be closed due to flooding.Strong winds downed trees and power lines in Winnebago county and tipped over a semi in Center Valley (Outagamie co.).  A 20 foot steel scaffolding, that had been set up to repair a chimney in Appleton (Outagamie co.), was blown down by strong winds causing damage to a car, power lines and a neighboring house.Half dollar size hail fell at Menasha and there were several reports of dime to quarter size hail.Flooding caused damage to as many as 150 homes and 30 vehicles in Menasha (Winnebago co.) and the Town of Harrison (Calumet co.).  Scattered power outages, impacting about 650 customers, were reported around Appelton, Neenah and Menasha.

Hail in CALUMET, WISCONSIN
From 30-JUL-03 18:00:00 to 30-JUL-03 18:00:00 (CST)
Location: DARBOY
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WINNEBAGO, WISCONSIN
From 30-JUL-03 17:19:00 to 30-JUL-03 17:19:00 (CST)
Location: MENASHA
Magnitude: 1.25 
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in OUTAGAMIE, WISCONSIN
From 30-JUL-03 13:41:00 to 30-JUL-03 13:41:00 (CST)
Location: CENTER VLY
Magnitude: 55 EG
Reported by: LAW ENFORCEMENT

Hail in OUTAGAMIE, WISCONSIN
From 30-JUL-03 15:59:00 to 30-JUL-03 15:59:00 (CST)
Location: APPLETON
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in OUTAGAMIE, WISCONSIN
From 30-JUL-03 16:35:00 to 30-JUL-03 16:35:00 (CST)
Location: DARBOY
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in CALUMET, WISCONSIN
From 30-JUL-03 17:25:00 to 30-JUL-03 17:25:00 (CST)
Location: DARBOY
Magnitude: 0.75 
Reported by: GENERAL PUBLIC

Hail in WINNEBAGO, WISCONSIN
From 30-JUL-03 13:30:00 to 30-JUL-03 13:30:00 (CST)
Location: OSHKOSH WITTMAN FLD
Magnitude: 1.00 
Reported by: AIRPLANE PILOT

Thunderstorm Wind in WINNEBAGO, WISCONSIN
From 30-JUL-03 13:10:00 to 30-JUL-03 13:10:00 (CST)
Location: WINNECONNE
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Hail in OUTAGAMIE, WISCONSIN
From 30-JUL-03 13:52:00 to 30-JUL-03 13:52:00 (CST)
Location: CENTER VLY
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in WINNEBAGO, WISCONSIN
From 30-JUL-03 21:21:00 to 30-JUL-03 21:21:00 (CST)
Location: OSHKOSH
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Flash Flood in CALUMET, WISCONSIN
From 30-JUL-03 17:30:00 to 30-JUL-03 20:30:00 (CST)
Location: APPLETON
Reported by: TRAINED SPOTTER

Flash Flood in OUTAGAMIE, WISCONSIN
From 30-JUL-03 16:03:00 to 30-JUL-03 21:00:00 (CST)
Location: APPLETON
Reported by: TRAINED SPOTTER

Flash Flood in BROWN, WISCONSIN
From 30-JUL-03 19:00:00 to 30-JUL-03 21:00:00 (CST)
Location: SOUTH PORTION
Reported by: EMERGENCY MANAGER

Flash Flood in WINNEBAGO, WISCONSIN
From 30-JUL-03 17:30:00 to 30-JUL-03 20:00:00 (CST)
Location: MENASHA
Property damage: 44.5K
Crop damage: 5.5K
Reported by: TRAINED SPOTTER

Flash Flood in BROWN, WISCONSIN
From 30-JUL-03 16:25:00 to 30-JUL-03 17:15:00 (CST)
Location: DE PERE
Reported by: LAW ENFORCEMENT