A tropical airmass and a frontal boundary lifted into southeast Michigan, which produced severe storms south of Eight Mile Road.

Hail in WASHTENAW, MICHIGAN
From 23-JUL-10 16:52:00 to 23-JUL-10 16:52:00 (EST-5)
Location: HUDSON MILLS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in WAYNE, MICHIGAN
From 23-JUL-10 17:44:00 to 23-JUL-10 17:44:00 (EST-5)
Location: ROMULUS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:45:00 to 23-JUL-10 17:45:00 (EST-5)
Location: TAYLOR CENTER
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Employee

Significant damage to large trees from straight line winds.

Tornado in WASHTENAW, MICHIGAN
From 23-JUL-10 17:33:00 to 23-JUL-10 17:35:00 (EST-5)
Location: STONY CREEK
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Storm Survey determined an EF0 tornado occured along Judd Road between Hitchingham and Whitaker Roads, and extended southeast to near Whitaker Road. Maximum estimated winds were around 80 mph, with a path length of 0.6 miles and width of 100 yards.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:03:00 to 23-JUL-10 17:03:00 (EST-5)
Location: ANN ARBOR YOUNG ARPT
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Six trees were reported blown down on area roadways.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:22:00 to 23-JUL-10 17:22:00 (EST-5)
Location: SALINE
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and powerlines were reported down.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:37:00 to 23-JUL-10 17:37:00 (EST-5)
Location: SALINE
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree branches were reported down on powerlines.

Thunderstorm Wind in LENAWEE, MICHIGAN
From 23-JUL-10 17:38:00 to 23-JUL-10 17:38:00 (EST-5)
Location: TECUMSEH
Magnitude: 56.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines reported down.

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:42:00 to 23-JUL-10 17:42:00 (EST-5)
Location: WEST SUMPTER
Magnitude: 54.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs and powerlines down.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:12:00 to 23-JUL-10 17:12:00 (EST-5)
Location: CHELSEA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a 60 mph thunderstorm wind gust.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:20:00 to 23-JUL-10 17:20:00 (EST-5)
Location: PITTSFIELD
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a 60 mph thunderstorm wind gust.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:35:00 to 23-JUL-10 17:35:00 (EST-5)
Location: WILLOW RUN
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:48:00 to 23-JUL-10 17:48:00 (EST-5)
Location: ROMULUS
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees blown down.

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:28:00 to 23-JUL-10 17:28:00 (EST-5)
Location: DENTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a 70 mph thunderstorm wind gust.

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:47:00 to 23-JUL-10 17:47:00 (EST-5)
Location: TAYLOR CENTER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a 60 mph thunderstorm wind gust.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-JUL-10 17:30:00 to 23-JUL-10 17:30:00 (EST-5)
Location: WHITTAKER
Magnitude: 71.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A measured 82 mph thunderstorm wind gust was reported.

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-JUL-10 17:53:00 to 23-JUL-10 17:53:00 (EST-5)
Location: WYANDOTTE
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees were reported blown down.

Thunderstorm Wind in LENAWEE, MICHIGAN
From 23-JUL-10 18:50:00 to 23-JUL-10 18:50:00 (EST-5)
Location: IRISH HILLS
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines reported down.

Flood in WAYNE, MICHIGAN
From 23-JUL-10 18:34:00 to 23-JUL-10 20:34:00 (EST-5)
Location: ALLEN PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two and half to three inches of rain fell in 2 hours, resulting in flooding. Six to eight inches of water was reported on some side streets, making them impassable.