Clusters or short lines of thunderstorms, some severe, moved east-southeast through parts of south-central and southeast Wisconsin.  The primary effect was powerful, downburst, straight-line winds that toppled large trees and some power-lines.  Estimated gusts were mostly in the 52 to 56 knot range (60 to 65 mph).  Two gustnadoes were observed southeast of Highland (Iowa Co.) on the west shore of Blackhawk Lake.  Other than tearing up some trees, the gustnadoes blew around camping gear, tables, etc.  A boat on Blackhawk Lake was spun around by one of the gustnadoes.  A gustnado was also observed by a storm spotter northwest of Brandon (Fond du Lac Co.).  Its path length was about 1/4 to 1/2 mile and it managed to shred or push down some corn crop and small tree limbs.  Gustnadoes are ground-based vortices that spin up on a gust front preceding a downburst, and are not recognized as true tornadoes.  Rather, they are documented as thunderstorm wind events.  Last, but not least, the powerful thunderstorm winds blew over a silo located on a farm south of Evansville (Rock Co.).   A 43-year old female in the city of Milwaukee (Milwaukee Co.) died on June 26th due a injuries, with heat being listed as a contributing cause of death (indirectly-related to heat).  Maximum temperatures around 93 were observed in the Milwaukee area on June 24th and 25th, about 15 degrees above normal.  Heat index values were around 100, suggesting an urban heat-island effect took place.

Thunderstorm Wind in FOND DU LAC, WISCONSIN
From 25-JUN-03 15:05:00 to 25-JUN-03 15:05:00 (CST)
Location: BRANDON
Magnitude: 61 EG
Crop damage: 1K
Reported by: STORM CHASER

Thunderstorm Wind in DANE, WISCONSIN
From 25-JUN-03 15:20:00 to 25-JUN-03 15:20:00 (CST)
Location: ROCKDALE
Magnitude: 52 EG
Reported by: TRAINED SPOTTER

Thunderstorm Wind in ROCK, WISCONSIN
From 25-JUN-03 14:28:00 to 25-JUN-03 14:28:00 (CST)
Location: EVANSVILLE
Magnitude: 65 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in IOWA, WISCONSIN
From 25-JUN-03 13:05:00 to 25-JUN-03 13:05:00 (CST)
Location: HIGHLAND
Magnitude: 61 EG
Property damage: 1K
Reported by: GENERAL PUBLIC

Thunderstorm Wind in JEFFERSON, WISCONSIN
From 25-JUN-03 15:15:00 to 25-JUN-03 15:15:00 (CST)
Location: JEFFERSON
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Hail in SAUK, WISCONSIN
From 25-JUN-03 13:38:00 to 25-JUN-03 13:38:00 (CST)
Location: LAKE DELTON
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in COLUMBIA, WISCONSIN
From 25-JUN-03 14:20:00 to 25-JUN-03 14:20:00 (CST)
Location: ARLINGTON
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in COLUMBIA, WISCONSIN
From 25-JUN-03 14:45:00 to 25-JUN-03 14:45:00 (CST)
Location: FRIESLAND
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in DANE, WISCONSIN
From 25-JUN-03 14:48:00 to 25-JUN-03 14:48:00 (CST)
Location: STOUGHTON
Magnitude: 52 EG
Reported by: TRAINED SPOTTER

Thunderstorm Wind in SAUK, WISCONSIN
From 25-JUN-03 14:15:00 to 25-JUN-03 14:15:00 (CST)
Location: BARABOO
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in ROCK, WISCONSIN
From 25-JUN-03 15:00:00 to 25-JUN-03 15:00:00 (CST)
Location: EVANSVILLE
Magnitude: 52 EG
Crop damage: 15K
Reported by: LAW ENFORCEMENT