A cold front stalled out over the area and combined with an upper level low pressure system to support the development of severe thunderstorms. This event was very quick with the storms moving from Howell to just south of Detroit at 40 to 50 MPH. The most intense storm produced significant wind damage from southern Livingston County into northeast Washtenaw County. A tornado warning was issued for Washtenaw County. A National Weather Service field survey identified damages consistent with intense straight-line winds associated with thunderstorm downbursts. The storms knocked out power to 60 thousand customers in Southeast Lower Michigan. Half of downtown Brighton lost power, forcing numerous businesses to close. Several homes suffered damages from falling trees. There were no reports of any serious damages.

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 19-JUL-07 13:31:00 to 19-JUL-07 13:31:00 (EST-5)
Location: LAINGSBURG
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported numerous trees and power lines down.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 19-JUL-07 14:35:00 to 19-JUL-07 14:35:00 (EST-5)
Location: DEXTER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a large tree down.

Thunderstorm Wind in WAYNE, MICHIGAN
From 19-JUL-07 15:12:00 to 19-JUL-07 15:12:00 (EST-5)
Location: WESTLAND
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 19-JUL-07 14:20:00 to 19-JUL-07 14:20:00 (EST-5)
Location: HOWELL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A National Weather Service employee reported large tree branches down.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 19-JUL-07 14:30:00 to 19-JUL-07 14:30:00 (EST-5)
Location: DEXTER
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

The public reported large trees down. The high winds also lifted and flipped a pontoon boat.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-JUL-07 14:40:00 to 19-JUL-07 14:40:00 (EST-5)
Location: NOVI
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A National Weather Service employee reported two trees down.

Thunderstorm Wind in WAYNE, MICHIGAN
From 19-JUL-07 15:10:00 to 19-JUL-07 15:10:00 (EST-5)
Location: DETROIT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Local television stations reported large trees down on the northwest side of Detroit.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 19-JUL-07 14:30:00 to 19-JUL-07 14:30:00 (EST-5)
Location: HAMBURG
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A local Television station reported dozens of trees down. One tree fell through the roof of the Livingston County Wildlife and Conservation Club. No one was injured. Total property damages were estimated at roughly $25K.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 19-JUL-07 14:40:00 to 19-JUL-07 14:40:00 (EST-5)
Location: WHITMORE LAKE
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management and trained spotters reported numerous large trees down. A few homes suffered minor damages.

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 19-JUL-07 13:39:00 to 19-JUL-07 13:39:00 (EST-5)
Location: OWOSSO
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported numerous trees down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 19-JUL-07 14:22:00 to 19-JUL-07 14:22:00 (EST-5)
Location: BRIGHTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported many large tree branches down and estimated the wind gusts at 65 MPH.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-JUL-07 15:00:00 to 19-JUL-07 15:00:00 (EST-5)
Location: FARMINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A National Weather Service employee reported large tree branches down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 19-JUL-07 14:35:00 to 19-JUL-07 14:35:00 (EST-5)
Location: BRIGHTON
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported several large trees down.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 19-JUL-07 14:45:00 to 19-JUL-07 14:45:00 (EST-5)
Location: SALEM
Magnitude: 58.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management received numerous reports of trees and power lines down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-JUL-07 14:40:00 to 19-JUL-07 14:40:00 (EST-5)
Location: NOVI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported large tree branches down.