Thunderstorms developed in moist and unstable air as a cold front and upper level trough moved through northeast Wisconsin.  Several severe thunderstorms formed during the afternoon, one of which produced a tornado in the vicinity of a lake breeze front in Manitowoc county.  Strong winds from these storms downed trees and power lines in Valders (Manitowoc co.), near Wild Rose (Waushara co.), and from Athelstane to Middle Inlet (Marinette co.) and damaged trees at a country club in Luxemburg (Kewaunee co.) and at Whitefish Dunes State Park (Door co.).  Tennis ball size hail fell between Reedsville and Whitelaw (Manitowoc co.) and golf ball size hail was reported at Lakewood (Oconto co.).  There were also several reports of quarter size hail.Law enforcement officers watch as two funnel clouds moved across central Manitowoc county. One of the funnels touched down near Clarks Mills causing extensive damage to two farms.  The tornado destroyed 2 garages, 2 barns, 2 milking parlors, 3 silos, 45 calf hutches and about 80 acres of alfalfa.  It damaged barns, service buildings, farm equipment and at least a dozen residences, one of which was uninhabitable.  The tornado snapped and uprooted trees and carried a calf about half a mile away where it was found still alive.

Hail in MANITOWOC, WISCONSIN
From 13-JUL-04 14:30:00 to 13-JUL-04 14:39:00 (CST)
Location: REEDSVILLE
Magnitude: 2.50 
Reported by: AMATEUR RADIO

Hail in DOOR, WISCONSIN
From 13-JUL-04 13:40:00 to 13-JUL-04 13:40:00 (CST)
Location: FORESTVILLE
Magnitude: 1.00 
Reported by: OFFICIAL NWS OBS.

Hail in WINNEBAGO, WISCONSIN
From 13-JUL-04 15:00:00 to 13-JUL-04 15:00:00 (CST)
Location: OSHKOSH
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Tornado in MANITOWOC, WISCONSIN
From 13-JUL-04 14:40:00 to 13-JUL-04 14:52:00 (CST)
Location: CLARK MILLS
Tornado F-scale: F1
Property damage: 1.6M
Crop damage: 10K
Reported by: LAW ENFORCEMENT

Hail in PORTAGE, WISCONSIN
From 13-JUL-04 13:25:00 to 13-JUL-04 13:25:00 (CST)
Location: BANCROFT
Magnitude: 1.00 
Reported by: POST OFFICE

Hail in CALUMET, WISCONSIN
From 13-JUL-04 15:00:00 to 13-JUL-04 15:00:00 (CST)
Location: CHILTON
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in MARINETTE, WISCONSIN
From 13-JUL-04 14:25:00 to 13-JUL-04 14:25:00 (CST)
Location: COLEMAN
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in KEWAUNEE, WISCONSIN
From 13-JUL-04 14:00:00 to 13-JUL-04 14:00:00 (CST)
Location: LUXEMBURG
Magnitude: 52 EG
Reported by: AMATEUR RADIO

Hail in CALUMET, WISCONSIN
From 13-JUL-04 14:00:00 to 13-JUL-04 14:15:00 (CST)
Location: FOREST JCT
Magnitude: 1.00 
Reported by: AMATEUR RADIO

Hail in OCONTO, WISCONSIN
From 13-JUL-04 14:57:00 to 13-JUL-04 14:57:00 (CST)
Location: LENA
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Hail in KEWAUNEE, WISCONSIN
From 13-JUL-04 14:00:00 to 13-JUL-04 14:03:00 (CST)
Location: ALGOMA
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in WAUSHARA, WISCONSIN
From 13-JUL-04 13:40:00 to 13-JUL-04 13:40:00 (CST)
Location: WILD ROSE
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in MANITOWOC, WISCONSIN
From 13-JUL-04 14:56:00 to 13-JUL-04 14:56:00 (CST)
Location: VALDERS
Magnitude: 50 EG
Reported by: AMATEUR RADIO

Thunderstorm Wind in DOOR, WISCONSIN
From 13-JUL-04 15:35:00 to 13-JUL-04 15:35:00 (CST)
Location: JACKSONPORT
Magnitude: 50 EG
Reported by: PARK/FOREST SERVICE

Thunderstorm Wind in MARINETTE, WISCONSIN
From 13-JUL-04 13:45:00 to 13-JUL-04 13:45:00 (CST)
Location: ATHELSTANE
Magnitude: 50 EG
Reported by: LAW ENFORCEMENT

Hail in BROWN, WISCONSIN
From 13-JUL-04 13:56:00 to 13-JUL-04 13:56:00 (CST)
Location: WRIGHTSTOWN
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

Hail in WAUPACA, WISCONSIN
From 13-JUL-04 12:58:00 to 13-JUL-04 12:58:00 (CST)
Location: IOLA
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Hail in OCONTO, WISCONSIN
From 13-JUL-04 13:34:00 to 13-JUL-04 13:34:00 (CST)
Location: LAKEWOOD
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Hail in OUTAGAMIE, WISCONSIN
From 13-JUL-04 13:20:00 to 13-JUL-04 13:30:00 (CST)
Location: APPLETON
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT