A strong but nearly stationary cold front ran just inland from the Minnesota north shore of Lake Superior southwestward through the Sioux Falls SD area.  Warm and unstable air with high surface dew points pooled along and east of the front, including over the Wisconsin blow down area.  A cluster of thunderstorms became severe just west of the upper St Croix river, in Pine County MN, and spread rapidly northeastward through northwest Wisconsin.  Extensive straight-line wind damage occurred. In Burnett County 140,000 acres of trees were damaged or destroyed, which is estimated to be 1.5 million cords.  Damage to public property, like roads and trails, was $1.8 million. Uninsured property damage was estimated at $350,000. The storm injured 39 people. Most injuries were minor.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:25:00 to 01-JUL-11 18:25:00 (CST-6)
Location: WEBB LAKE
Magnitude: 100.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees were blown down along County Road A from Bushy Road through Sand Lake and the Voyagers Village area.  Numerous trees fell on homes and cabins and blocked driveways.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:25:00 to 01-JUL-11 18:25:00 (CST-6)
Location: YELLOW LAKE
Magnitude: 100.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Widespread tree damage was noted with power lines down.  Several large trees were uprooted and many trees were on buildings and blocking roads.

Thunderstorm Wind in WASHBURN, WISCONSIN
From 01-JUL-11 19:10:00 to 01-JUL-11 19:10:00 (CST-6)
Location: BEAVER BROOK
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large billboard sign was blown down.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:30:00 to 01-JUL-11 19:30:00 (CST-6)
Location: HAYWARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees were blown down and uprooted, with power lines down across much of western Sawyer County.

Thunderstorm Wind in WASHBURN, WISCONSIN
From 01-JUL-11 18:45:00 to 01-JUL-11 18:45:00 (CST-6)
Location: MINONG
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A roof was blown off a business along Route 53.  Estimated wind speed is derived from the NWS WFO Duluth Storm Survey derived Wind Damage Swath Map of this episode.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:14:00 to 01-JUL-11 18:14:00 (CST-6)
Location: GRANTSBURG
Magnitude: 80.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Partial roof loss to two buildings was found, along with widespread tree damage and large trees uprooted.  Highway 70 and many side roads were impassable, with no power.  The Red Cross opened a shelter to distribute food and water.  Estimated wind speed is derived from the NWS WFO Duluth Storm Survey.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:25:00 to 01-JUL-11 18:25:00 (CST-6)
Location: WEBB LAKE
Magnitude: 104.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There was widespread tree damage. All power lines along County Road H between Webb Lake and Fish Lake were blown down.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 01-JUL-11 19:30:00 to 01-JUL-11 19:55:00 (CST-6)
Location: MARENGO
Magnitude: 70.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

The winds blew down numerous trees. Several homes were damaged from falling trees. There was also some structural damage at the Ashland County fairgrounds.

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 17:34:00 to 01-JUL-11 17:34:00 (CST-6)
Location: EAST END
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was reported at 39th and US Highway 2.

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 17:45:00 to 01-JUL-11 17:45:00 (CST-6)
Location: EAST END
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in ASHLAND, WISCONSIN
From 01-JUL-11 19:35:00 to 01-JUL-11 19:35:00 (CST-6)
Location: SANDBORN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Blown down trees were blocking County Road B.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:15:00 to 01-JUL-11 19:15:00 (CST-6)
Location: HAYWARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A stop sign was snapped off on Main Street.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 01-JUL-11 21:00:00 to 01-JUL-11 21:00:00 (CST-6)
Location: SUTHERLAND
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were blown down around Barnes, WI.

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 18:05:00 to 01-JUL-11 18:05:00 (CST-6)
Location: HAWTHORNE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 18:08:00 to 01-JUL-11 18:08:00 (CST-6)
Location: HAWTHORNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail was reported at Route 53 and County Road B.

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 18:16:00 to 01-JUL-11 18:16:00 (CST-6)
Location: BRULE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 18:16:00 to 01-JUL-11 18:16:00 (CST-6)
Location: POPLAR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in ASHLAND, WISCONSIN
From 01-JUL-11 20:00:00 to 01-JUL-11 20:00:00 (CST-6)
Location: ASHLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees were blown down.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 18:55:00 to 01-JUL-11 18:55:00 (CST-6)
Location: SOLON SPRINGS
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power was knocked out and numerous trees were blown down.

Thunderstorm Wind in BAYFIELD, WISCONSIN
From 01-JUL-11 19:05:00 to 01-JUL-11 19:05:00 (CST-6)
Location: SUTHERLAND
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were blown down around Barnes WI.  Estimated wind speed is derived from the NWS WFO Duluth Storm Survey derived Wind Damage Swath Map of this episode.

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 18:55:00 to 01-JUL-11 18:55:00 (CST-6)
Location: MAPLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in DOUGLAS, WISCONSIN
From 01-JUL-11 19:09:00 to 01-JUL-11 19:09:00 (CST-6)
Location: WAINO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:14:00 to 01-JUL-11 18:14:00 (CST-6)
Location: GRANTSBURG
Magnitude: 70.00 ES
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down and power was knocked out.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:05:00 to 01-JUL-11 19:05:00 (CST-6)
Location: HAYWARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Stop sign was snapped off on Main Street.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:20:00 to 01-JUL-11 19:20:00 (CST-6)
Location: GRINDSTONE LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Numerous trees were blown down and uprooted, with power lines down across much of western Sawyer County.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:04:00 to 01-JUL-11 19:04:00 (CST-6)
Location: HAYWARD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many trees were blown down.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 01-JUL-11 19:50:00 to 01-JUL-11 19:50:00 (CST-6)
Location: ASHLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous trees were blown down.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:18:00 to 01-JUL-11 18:18:00 (CST-6)
Location: TRADE LAKE
Magnitude: 70.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Significant wind damage occurred, with numerous trees blown down, boats flipped and blown on shore.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:20:00 to 01-JUL-11 18:20:00 (CST-6)
Location: GRANTSBURG
Magnitude: 70.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A yard, 3.5 acres in area, lost nearly every tree, including large oaks over 50 years old.   A fireworks tent was blown over.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 18:50:00 to 01-JUL-11 18:50:00 (CST-6)
Location: WASCOTT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees and power lines were blown down.

Tornado in DOUGLAS, WISCONSIN
From 01-JUL-11 18:51:00 to 01-JUL-11 18:54:00 (CST-6)
Location: SOLON SPRINGS
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A house was destroyed and its outbuildings were destroyed.  Several other  outbuildings and houses were damaged.  Many trees were snapped off or uprooted.  Peak winds were estimated at 120 to 130 mph.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:25:00 to 01-JUL-11 18:25:00 (CST-6)
Location: DANBURY
Magnitude: 96.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Most trees in the area were blown down; several fell on cars and structures.  Mobile homes were damaged.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 19:05:00 to 01-JUL-11 19:05:00 (CST-6)
Location: LAKE NEBAGAMON ARPT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and power lines were blown down.  Estimated wind speed is derived from the NWS WFO Duluth Storm Survey derived Wind Damage Swath Map of this episode.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:15:00 to 01-JUL-11 18:15:00 (CST-6)
Location: DANBURY
Magnitude: 96.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There was shingle damage to a roof on a two-story home along Highway 7. Numerous trees were blown down in the area.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:18:00 to 01-JUL-11 18:18:00 (CST-6)
Location: SIREN BURNETT CO ARP
Magnitude: 70.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Only one wall was left intact on a camper-trailer.  No one was inside at the time.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:19:00 to 01-JUL-11 18:19:00 (CST-6)
Location: WEBSTER
Magnitude: 96.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The storm caused widespread tree damage around Yellow Lake, with many trees uprooted.

Thunderstorm Wind in ASHLAND, WISCONSIN
From 01-JUL-11 20:07:00 to 01-JUL-11 20:07:00 (CST-6)
Location: BUTTERNUT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Trees and power lines were blown down along Highway 13 north of Butternut.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:28:00 to 01-JUL-11 18:28:00 (CST-6)
Location: DANBURY
Magnitude: 104.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This was the corridor of an intense down-burst wind-damage found just west of Danbury.  The corridor was 1/4 mile wide and 500 yards long, within which every single tree was snapped off or flattened.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:20:00 to 01-JUL-11 18:20:00 (CST-6)
Location: WEBSTER
Magnitude: 96.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There was widespread tree damage in Webster and the surrounding area.  Many trees had fallen on buildings and campers, and power was out for days.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:21:00 to 01-JUL-11 18:21:00 (CST-6)
Location: PERIDA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were down across County Roads F and FF.  Siding was blown off a house and there was roof damage.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 18:35:00 to 01-JUL-11 18:35:00 (CST-6)
Location: COZY CORNERS
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread wind damage to trees in the Dairyland area, with many homes impacted by falling trees.  One tree fell through the roof of a house.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:30:00 to 01-JUL-11 18:30:00 (CST-6)
Location: GRANTSBURG
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were blown down.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 18:51:00 to 01-JUL-11 18:51:00 (CST-6)
Location: WASCOTT
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Many trees were blown down, smashing campers and cars at Red Lake Resort.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:28:00 to 01-JUL-11 18:28:00 (CST-6)
Location: DANBURY
Magnitude: 104.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This was a corridor of intense down-burst wind damage found just west of Danbury.  Wind speeds were estimated well in excess of 100 mph.

Thunderstorm Wind in SAWYER, WISCONSIN
From 01-JUL-11 19:10:00 to 01-JUL-11 19:10:00 (CST-6)
Location: ROUND LAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power was knocked out and numerous large trees were blown down.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:22:00 to 01-JUL-11 18:22:00 (CST-6)
Location: YELLOW LAKE
Magnitude: 96.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A swath of trees was snapped off along county Road U. Several trees fell on homes and blocked driveways.

Thunderstorm Wind in DOUGLAS, WISCONSIN
From 01-JUL-11 19:10:00 to 01-JUL-11 19:10:00 (CST-6)
Location: SOLON SPRINGS
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Power was out and numerous trees were blown down.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:23:00 to 01-JUL-11 18:23:00 (CST-6)
Location: WEBB LAKE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A stand of Norway pines, 18 inches in diameter, was blown down.

Thunderstorm Wind in BURNETT, WISCONSIN
From 01-JUL-11 18:22:00 to 01-JUL-11 18:22:00 (CST-6)
Location: YELLOW LAKE
Magnitude: 100.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Two homes on the east side of Johnson Lake had their entire roofs lifted off along with widespread tree damage and several large trees snapped off.

Lightning in BURNETT, WISCONSIN
From 01-JUL-11 18:45:00 to 01-JUL-11 18:45:00 (CST-6)
Location: HERTEL
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

An eleven year old girl was killed while trying to escape the approaching storm.  Lightning struck a tree and the tree fell on the girl, killing her.  The tree was so large that it took 20 men to remove it.

Hail in BAYFIELD, WISCONSIN
From 01-JUL-11 18:20:00 to 01-JUL-11 18:20:00 (CST-6)
Location: HERBSTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media