A pair of mesoscale convective complexes crossed southern Wisconsin during the early morning hours of July 11th. The first complex weakened as it moved eastward through northern sections of South Central and Southeast Wisconsin, though it produced severe wind gusts that caused damage across eastern Green Lake County into Fond Du Lac and Dodge counties.  The second, stronger, complex moved along and south of the I-94 corridor. Embedded bow echo structures on radar indicated portions of the complex that caused widespread damaging wind gusts that downed power lines, blew over trees, damaged buildings, and flattened barns and corn fields. At the height of the event, WE Energies reported 28,000 customers were without power in Southeast Wisconsin.

Thunderstorm Wind in ROCK, WISCONSIN
From 11-JUL-11 06:00:00 to 11-JUL-11 06:35:00 (CST-6)
Location: ORFORDVILLE
Magnitude: 65.00 EG
Property damage: 125.00K
Crop damage: 700.00K
Reported by: Law Enforcement

Law enforcement officials in Rock County reported trees and power lines down in a 23-mile wide swath from west northwest of Orfordville to northeast of Clinton due to damaging thunderstorm wind gusts estimated at 65 knots (75 mph). Corn crops, valued at $700,000, were also flattened. A home in downtown Janesville had a bedroom addition crushed when a tree fell on it. The winds also blew down a barn on Creek Road where it crosses Turtle Creek, as well as a giant 22-foot, 2,000 pound fiberglass pumpkin off of a 65-foot tall silo at Meyer's Farm Market north of Janesville.

Thunderstorm Wind in JEFFERSON, WISCONSIN
From 11-JUL-11 06:40:00 to 11-JUL-11 07:12:00 (CST-6)
Location: BUSSEYVILLE
Magnitude: 56.00 EG
Reported by: Law Enforcement

Law enforcement officials reported trees and power lines down in an 8-mile wide swath from near Busseyville to north of Palmyra due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph). Corn crops were also blown down by the damaging winds.

Thunderstorm Wind in KENOSHA, WISCONSIN
From 11-JUL-11 06:50:00 to 11-JUL-11 06:50:00 (CST-6)
Location: SALEM
Magnitude: 56.00 EG
Reported by: Law Enforcement

Law enforcement officials reported trees down in the town of Salem due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph).

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 11-JUL-11 07:00:00 to 11-JUL-11 07:00:00 (CST-6)
Location: DOUSMAN
Magnitude: 56.00 EG
Reported by: Newspaper

Local newspapers reported trees down southwest of Dousman due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph). A motorcyclist was injured when he had to lay down his bike to avoid a downed tree across the road. The wind sensor at the National Weather Service office recorded a peak wind gust of 54 mph (47 knots).

Thunderstorm Wind in KENOSHA, WISCONSIN
From 11-JUL-11 07:12:00 to 11-JUL-11 07:12:00 (CST-6)
Location: DOWNTOWN KENOSHA
Magnitude: 53.00 MG
Reported by: Newspaper

Local newspapers reported a dozen trees down in the city of Kenosha due to damaging thunderstorm wind gusts measured at 53 knots (61 mph). The strong wind gusts were responsible for delays on several Metra railroad lines, as well as the Union Pacific rail that runs from Kenosha to Chicago.

Lightning in WAUKESHA, WISCONSIN
From 11-JUL-11 07:25:00 to 11-JUL-11 07:25:00 (CST-6)
Location: HARTLAND
Property damage: 1.00K
Reported by: Newspaper

Newspapers reported lightning struck a power pole that knocked out power to residents in Hartland for 3 hours.

Thunderstorm Wind in GREEN LAKE, WISCONSIN
From 11-JUL-11 03:05:00 to 11-JUL-11 03:05:00 (CST-6)
Location: BERLIN
Magnitude: 55.00 MG
Reported by: Emergency Manager

The Green Lake County Emergency Manager reported many large tree branches down in the town of Berlin from thunderstorm wind gusts measured at 63 mph (55 knots).

Thunderstorm Wind in WALWORTH, WISCONSIN
From 11-JUL-11 06:40:00 to 11-JUL-11 06:40:00 (CST-6)
Location: DELAVAN
Magnitude: 70.00 EG
Property damage: 100.00K
Reported by: Newspaper

Local newspapers reported trees and power lines down in and around the town of Delavan due to damaging thunderstorm wind gusts estimated at 70 knots (80 mph). The severe wind gusts felled 40 trees and damaged roofs and gutters on buildings at Lake Lawn Resort on the northeast side of Delavan Lake.

Thunderstorm Wind in WAUKESHA, WISCONSIN
From 11-JUL-11 07:25:00 to 11-JUL-11 07:35:00 (CST-6)
Location: DOWNTOWN WAUKESHA
Magnitude: 56.00 MG
Reported by: Trained Spotter

A trained spotter reported many trees down in a 5-mile wide swath from southwest of Waukesha to Elm Grove. Several bikes were damaged by falling tree branches at Frame Park in Waukesha. A building was severely damaged by the winds at Sunset Drive and Chapman on the southwest side of Waukesha. The damage was due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph).

Thunderstorm Wind in DODGE, WISCONSIN
From 11-JUL-11 03:55:00 to 11-JUL-11 03:55:00 (CST-6)
Location: JUNEAU
Magnitude: 56.00 EG
Reported by: Newspaper

Local newspapers reported trees blown down in the town of Juneau from thunderstorm wind gusts estimated at 64 mph (56 knots).  A large tree limb punched a hole through the metal roof of a park shelter in Juneau.

Thunderstorm Wind in GREEN, WISCONSIN
From 11-JUL-11 05:45:00 to 11-JUL-11 06:05:00 (CST-6)
Location: JORDAN
Magnitude: 65.00 EG
Property damage: 20.00K
Crop damage: 2.20M
Reported by: Emergency Manager

The Green County Emergency Manager reported trees down; power lines down and 1 home damaged in a 20-mile wide swath from near Jordan Center to north of Brodhead due to damaging thunderstorm wind gusts estimated at 65 knots (75 mph). Corn crops, valued at $2.2 million, were also flattened. Ludlow Bar in Monroe lost part of their roof. Wind gusts of 62 mph (54 knots) were measured by the AWOS at Mineral Point Airport at 656 am CDT and by a trained spotter in Brodhead at 658 am CDT.

Thunderstorm Wind in DANE, WISCONSIN
From 11-JUL-11 06:00:00 to 11-JUL-11 06:35:00 (CST-6)
Location: DALEYVILLE
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 300.00K
Reported by: Emergency Manager

The Dane County Emergency Manager reported trees and power lines down in a 10-mile wide swath from near Daleyville to north of Albion due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph). Corn crops, valued at $300,000, were also flattened. A home in Belleville suffered roof damage when a tree fell on it.

Lightning in WAUKESHA, WISCONSIN
From 11-JUL-11 06:00:00 to 11-JUL-11 06:00:00 (CST-6)
Location: MERTON
Property damage: 1.00K
Reported by: Newspaper

According to local newspaper reports, a home on Center Oak Road in Merton was struck by lightning, resulting in a minor fire.

Lightning in DODGE, WISCONSIN
From 11-JUL-11 05:00:00 to 11-JUL-11 05:00:00 (CST-6)
Location: HUSTISFORD
Property damage: 2.00K
Reported by: Newspaper

Newspapers reported a lightning strike that caused a minor fire at a home on State Highway 60, just west of Hustisford. The fire filled the basement with smoke.

Thunderstorm Wind in LAFAYETTE, WISCONSIN
From 11-JUL-11 05:10:00 to 11-JUL-11 05:30:00 (CST-6)
Location: BELMONT
Magnitude: 65.00 EG
Property damage: 200.00K
Crop damage: 1.00M
Reported by: Law Enforcement

Law enforcement reported damage in a 15-mile wide swath from southwest of Belmont to Woodford from thunderstorm wind gusts estimated at 75 mph (65 knots). Downed trees blocked roads and fallen power lines caused power outages in the towns of Belmont, Argyle and Darlington. Six homes were damaged, and a 100-year-old 38 foot by 100 foot barn was flattened on a farm near Argyle, damaging a tractor inside.

Thunderstorm Wind in IOWA, WISCONSIN
From 11-JUL-11 05:35:00 to 11-JUL-11 05:50:00 (CST-6)
Location: MINERAL PT
Magnitude: 56.00 EG
Reported by: Law Enforcement

Law enforcement reported trees downed in a 4-mile wide swath from Mineral Point to southeast of Hollandale from thunderstorm wind gusts estimated at 64 mph (56 knots).

Thunderstorm Wind in DODGE, WISCONSIN
From 11-JUL-11 03:25:00 to 11-JUL-11 03:35:00 (CST-6)
Location: FOX LAKE
Magnitude: 56.00 EG
Reported by: Emergency Manager

The Dodge County Emergency Manager reported 3 large trees blown down, many large tree branches down, and corn flattened in a 3-mile wide swath from northwest to southeast of Fox Lake  from thunderstorm wind gusts measured at 64 mph (56 knots).

Thunderstorm Wind in DODGE, WISCONSIN
From 11-JUL-11 03:50:00 to 11-JUL-11 03:55:00 (CST-6)
Location: KEKOSKEE
Magnitude: 56.00 EG
Reported by: Emergency Manager

The Dodge County Emergency Manager reported trees and power lines blown down in a 4-mile wide swath from Kekoskee to east of Brownsville from thunderstorm wind gusts estimated at 64 mph (56 knots).

Thunderstorm Wind in WALWORTH, WISCONSIN
From 11-JUL-11 06:45:00 to 11-JUL-11 06:50:00 (CST-6)
Location: TIBBET
Magnitude: 56.00 EG
Property damage: 800.00K
Reported by: Law Enforcement

Law enforcement officials reported trees and power lines down in a 5-mile wide swath from northeast of Tibbets to east of Elkhorn due to damaging thunderstorm wind gusts estimated at 60 knots (69 mph). Corn crops were also blown down by the damaging winds. Two county salt storage sheds off of County Highway NN in Elkhorn were also severely damaged by the thunderstorm gusts.Winds caused the paneling of one shed to collapse into the structure. The roof of the other shed was lifted from it's foundation, damaging electrical utilities attached to it and adjacent buildings before settling back down. Officials estimate it will cost $800,000 to repair the sheds. Trees also toppled over onto the Lauderdale Lakes Management district's community center on the corner of Sterlingworth Drive and U.S. Highway 12.

Thunderstorm Wind in WALWORTH, WISCONSIN
From 11-JUL-11 06:50:00 to 11-JUL-11 06:55:00 (CST-6)
Location: LAKE GENEVA
Magnitude: 56.00 EG
Property damage: 8.00K
Reported by: Law Enforcement

Law enforcement officials reported trees down in a 6-mile wide swath from west of Lake Geneva to east of Lake Geneva due to damaging thunderstorm wind gusts estimated at 56 knots (64 mph). A car was damaged when a tree fell on it.

Thunderstorm Wind in FOND DU LAC, WISCONSIN
From 11-JUL-11 03:50:00 to 11-JUL-11 03:55:00 (CST-6)
Location: BYRON
Magnitude: 56.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

The Fond Du Lac County Emergency Manager reported trees blown down and blocking a few roads as well as power lines and telephone lines blown down by thunderstorm wind gusts estimated at 64 mph (56 knots). The damage occurred in a 3-mile wide swath from Byron to north of Cambellsport.