Unstable air combined with a surface front and an upper level disturbance to produce severe thunderstorms across northern Wisconsin.  High winds from the storms, some estimated as strong as 90 mph, caused considerable damage to trees and power lines as the storms moved through north-central and northeast Wisconsin.  Roads across parts of northern Wisconsin were blocked by downed trees and power lines, including most of the roads in the town of Nashville (Forest Co.) where numerous homes were damaged.
Power was knocked out to more than 15,000 Wisconsin Public Service customers in Oneida County, Forest County, Langlade County, Marinette County and Door County for at least part of the night.  On the morning of the 24th there were still 8,500 customers without power, 500 of whom did not have electricity restored by late afternoon.

Thunderstorm Wind in DOOR, WISCONSIN
From 23-JUN-10 19:15:00 to 23-JUN-10 19:15:00 (CST-6)
Location: BAILEYS HARBOR
Magnitude: 52.00 EG
Reported by: Amateur Radio

Thunderstorm winds downed a tree and power pole near County highway E and Maple Road, knocking out power to much of Baileys Harbor.

Thunderstorm Wind in FOREST, WISCONSIN
From 23-JUN-10 16:40:00 to 23-JUN-10 16:40:00 (CST-6)
Location: PADUS
Magnitude: 56.00 EG
Reported by: COOP Observer

Thunderstorms produced winds that downed several trees and produced half inch diameter hail.

Thunderstorm Wind in MARINETTE, WISCONSIN
From 23-JUN-10 17:35:00 to 23-JUN-10 17:35:00 (CST-6)
Location: CRIVITZ MUNI ARPT
Magnitude: 78.00 EG
Property damage: 10.00K
Reported by: COOP Observer

Thunderstorm winds uprooted 8 to 12 inch diameter pine trees.  The storm also flipped the 48 foot by 100 foot roof of a metal storage building onto the roof of another storage building that was about 100 feet away.

Thunderstorm Wind in FOREST, WISCONSIN
From 23-JUN-10 16:50:00 to 23-JUN-10 16:50:00 (CST-6)
Location: MOLE LAKE
Magnitude: 65.00 EG
Property damage: 100.00K
Reported by: Emergency Manager

Thunderstorms winds downed numerous trees and several miles of power lines blocking most of the roads in the southern Forest County town of Nashville. At least ten houses and two out buildings sustained at least minor damage from the fallen trees.

Thunderstorm Wind in MARINETTE, WISCONSIN
From 23-JUN-10 17:54:00 to 23-JUN-10 17:54:00 (CST-6)
Location: CRIVITZ
Magnitude: 74.00 EG
Reported by: Trained Spotter

Thunderstorm winds downed numerous large trees, cutting a 100 foot wide swath through a stand of lodgepole pines.

Thunderstorm Wind in LANGLADE, WISCONSIN
From 23-JUN-10 16:30:00 to 23-JUN-10 16:30:00 (CST-6)
Location: ELCHO
Magnitude: 52.00 EG
Reported by: Law Enforcement

Thunderstorm winds downed large tree limbs and power lines on Enterprise Lake Road.

Thunderstorm Wind in OCONTO, WISCONSIN
From 23-JUN-10 17:15:00 to 23-JUN-10 17:15:00 (CST-6)
Location: LAKEWOOD
Magnitude: 61.00 EG
Reported by: Law Enforcement

Thunderstorm winds downed numerous trees and power lines in Lakewood.

Thunderstorm Wind in DOOR, WISCONSIN
From 23-JUN-10 19:10:00 to 23-JUN-10 19:10:00 (CST-6)
Location: EGG HARBOR
Magnitude: 61.00 EG
Reported by: Law Enforcement

Thunderstorm winds downed trees and power lines in Egg Harbor.

Thunderstorm Wind in FOREST, WISCONSIN
From 23-JUN-10 16:35:00 to 23-JUN-10 16:35:00 (CST-6)
Location: LAKE METONGA
Magnitude: 56.00 EG
Property damage: 10.00K
Reported by: Law Enforcement

Thunderstorms downed numerous trees and power lines. One of the fallen trees damaged a house.

Funnel Cloud in FOREST, WISCONSIN
From 23-JUN-10 17:15:00 to 23-JUN-10 17:15:00 (CST-6)
Location: CARTER
Reported by: Law Enforcement

A funnel cloud was observed near County Highway C in Carter.  Time of siting is estimated.

Thunderstorm Wind in FOREST, WISCONSIN
From 23-JUN-10 17:08:00 to 23-JUN-10 17:08:00 (CST-6)
Location: CARTER
Magnitude: 56.00 EG
Reported by: Emergency Manager

Thunderstorm winds downed several trees around Carter.

Thunderstorm Wind in MANITOWOC, WISCONSIN
From 23-JUN-10 19:35:00 to 23-JUN-10 19:35:00 (CST-6)
Location: KIEL
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Newspaper

An isolated thunderstorm moved across southwest Manitowoc County near Kiel and produced a wind gust over 60 mph.  The wind knocked over two utility poles, blew a trampoline 500 feet from its yard, ripped off the railings from a backyard deck, and flattened a grass field.

Thunderstorm Wind in LANGLADE, WISCONSIN
From 23-JUN-10 16:45:00 to 23-JUN-10 16:45:00 (CST-6)
Location: PICKEREL
Magnitude: 65.00 EG
Reported by: Fire Department/Rescue

Thunderstorm winds downed trees and power lines, making many roads impassable.  The storm tore the tops from trees along Highway 52.  Power outages were reported from Spoon Lane, along County Highway DD, to Highway 52.

Thunderstorm Wind in ONEIDA, WISCONSIN
From 23-JUN-10 16:23:00 to 23-JUN-10 16:23:00 (CST-6)
Location: ENTERPRISE
Magnitude: 70.00 EG
Property damage: 75.00K
Reported by: Law Enforcement

High winds from thunderstorms downed trees and power lines.  Fallen trees significantly damaged a house and blocked two roads along the southwest shore of Pelican Lake.