After a warm front moved north through south-central and southeast Wisconsin, an upper-level short-wave trough interacted with unstable air to produce scattered clusters of severe storms with large hail.  This was round one of a two-part severe weather punch associated with the same large-scale synoptic weather system.

Hail in ROCK, WISCONSIN
From 21-MAR-07 17:30:00 to 21-MAR-07 17:45:00 (CST-6)
Location: EVANSVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in JEFFERSON, WISCONSIN
From 21-MAR-07 17:20:00 to 21-MAR-07 17:20:00 (CST-6)
Location: JEFFERSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in JEFFERSON, WISCONSIN
From 21-MAR-07 17:10:00 to 21-MAR-07 17:12:00 (CST-6)
Location: JEFFERSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in DODGE, WISCONSIN
From 21-MAR-07 18:06:00 to 21-MAR-07 18:08:00 (CST-6)
Location: CLYMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DODGE, WISCONSIN
From 21-MAR-07 18:22:00 to 21-MAR-07 18:22:00 (CST-6)
Location: HUSTISFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WAUKESHA, WISCONSIN
From 21-MAR-07 18:49:00 to 21-MAR-07 18:49:00 (CST-6)
Location: PEWAUKEE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WAUKESHA, WISCONSIN
From 21-MAR-07 19:05:00 to 21-MAR-07 19:05:00 (CST-6)
Location: MENOMONEE FALLS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in RACINE, WISCONSIN
From 21-MAR-07 19:35:00 to 21-MAR-07 19:35:00 (CST-6)
Location: UNION GROVE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in RACINE, WISCONSIN
From 21-MAR-07 19:39:00 to 21-MAR-07 19:39:00 (CST-6)
Location: STURTEVANT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in KENOSHA, WISCONSIN
From 21-MAR-07 19:50:00 to 21-MAR-07 19:50:00 (CST-6)
Location: DOWNTOWN KENOSHA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KENOSHA, WISCONSIN
From 21-MAR-07 20:50:00 to 21-MAR-07 20:50:00 (CST-6)
Location: SOMERS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SAUK, WISCONSIN
From 21-MAR-07 15:55:00 to 21-MAR-07 16:06:00 (CST-6)
Location: SAUK CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in COLUMBIA, WISCONSIN
From 21-MAR-07 16:03:00 to 21-MAR-07 16:20:00 (CST-6)
Location: OKEE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in DANE, WISCONSIN
From 21-MAR-07 16:50:00 to 21-MAR-07 17:10:00 (CST-6)
Location: OREGON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GREEN, WISCONSIN
From 21-MAR-07 16:40:00 to 21-MAR-07 16:40:00 (CST-6)
Location: ATTICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ROCK, WISCONSIN
From 21-MAR-07 16:11:00 to 21-MAR-07 16:15:00 (CST-6)
Location: EDGERTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROCK, WISCONSIN
From 21-MAR-07 16:45:00 to 21-MAR-07 16:45:00 (CST-6)
Location: UNION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DANE, WISCONSIN
From 21-MAR-07 17:50:00 to 21-MAR-07 17:50:00 (CST-6)
Location: ALBION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WAUKESHA, WISCONSIN
From 21-MAR-07 18:28:00 to 21-MAR-07 18:35:00 (CST-6)
Location: OCONOMOWOC
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MILWAUKEE, WISCONSIN
From 21-MAR-07 19:11:00 to 21-MAR-07 19:11:00 (CST-6)
Location: BROWN DEER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MILWAUKEE, WISCONSIN
From 21-MAR-07 19:13:00 to 21-MAR-07 19:13:00 (CST-6)
Location: BROWN DEER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The ground was covered white by the hail.

Hail in MILWAUKEE, WISCONSIN
From 21-MAR-07 20:11:00 to 21-MAR-07 20:11:00 (CST-6)
Location: TIMMERMAN ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OZAUKEE, WISCONSIN
From 21-MAR-07 19:18:00 to 21-MAR-07 19:18:00 (CST-6)
Location: PORT WASHINGTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in OZAUKEE, WISCONSIN
From 21-MAR-07 19:27:00 to 21-MAR-07 19:27:00 (CST-6)
Location: CEDARBURG
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in RACINE, WISCONSIN
From 21-MAR-07 19:31:00 to 21-MAR-07 19:31:00 (CST-6)
Location: UNION GROVE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in JEFFERSON, WISCONSIN
From 21-MAR-07 17:58:00 to 21-MAR-07 17:58:00 (CST-6)
Location: BUSSEYVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in RACINE, WISCONSIN
From 21-MAR-07 19:27:00 to 21-MAR-07 19:27:00 (CST-6)
Location: UNION GROVE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement