This severe thunderstorm event was day two of a three consecutive day stretch of severe weather across Southeast Michigan. It also featured the first tornado of the season. The event began with a thunderstorm in Midland County that moved east across the Thumb. This storm prompted the issuance of several tornado warnings, but other than a few funnel cloud and large hail reports, there was only one report of damage. This occurred near Argyle in northwestern Sanilac County and based on funnel cloud reports/photographs, tree damage, and radar signatures, it was confirmed as an EF0 tornado. At the same time this was occurring, a very fast moving squall line with a history of producing damaging wind gusts was approaching the lower half of Southeast Lower Michigan. Although the squall line became less organized and slowed its forward progress dramatically, it still produced numerous reports of wind damage across the area.

Hail in TUSCOLA, MICHIGAN
From 23-AUG-07 17:07:00 to 23-AUG-07 17:07:00 (EST-5)
Location: UNIONVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TUSCOLA, MICHIGAN
From 23-AUG-07 17:50:00 to 23-AUG-07 17:50:00 (EST-5)
Location: CASS CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 23-AUG-07 19:45:00 to 23-AUG-07 19:45:00 (EST-5)
Location: FRASER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BAY, MICHIGAN
From 23-AUG-07 16:41:00 to 23-AUG-07 16:41:00 (EST-5)
Location: BAY CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a tree down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 23-AUG-07 18:45:00 to 23-AUG-07 18:45:00 (EST-5)
Location: LAKELAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated the wind gusts at 60 MPH.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-AUG-07 19:29:00 to 23-AUG-07 19:29:00 (EST-5)
Location: SALEM
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The public reported trees down.

Thunderstorm Wind in BAY, MICHIGAN
From 23-AUG-07 16:41:00 to 23-AUG-07 16:41:00 (EST-5)
Location: BAY CITY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a tree down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 23-AUG-07 19:40:00 to 23-AUG-07 19:40:00 (EST-5)
Location: FRASER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree branch 8 inches in diameter down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 23-AUG-07 19:32:00 to 23-AUG-07 19:32:00 (EST-5)
Location: FARMINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported large tree branches down.

Tornado in SANILAC, MICHIGAN
From 23-AUG-07 18:07:00 to 23-AUG-07 18:07:00 (EST-5)
Location: ARGYLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a tornado touchdown with several large trees down.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 23-AUG-07 18:40:00 to 23-AUG-07 18:40:00 (EST-5)
Location: PINCKNEY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees and branches down and estimated the wind gusts at 60 MPH.

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 23-AUG-07 17:42:00 to 23-AUG-07 17:42:00 (EST-5)
Location: CASS CITY
Magnitude: 55.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A large tree fell through the roof of a home on Elmwood Road just south of Cass City. Total property damage was estimated at roughly $10K.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 23-AUG-07 16:40:00 to 23-AUG-07 16:40:00 (EST-5)
Location: SAGINAW
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported wires down at the intersection of M84 and Tittabawassee Road.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 23-AUG-07 19:00:00 to 23-AUG-07 19:00:00 (EST-5)
Location: BRIGHTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A National Weather Service employee reported a tree branch 4 inches in diameter down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 23-AUG-07 19:11:00 to 23-AUG-07 19:12:00 (EST-5)
Location: COMMERCE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Large branches up to 10 inches in diameter down around the Commerce area.

Thunderstorm Wind in WAYNE, MICHIGAN
From 23-AUG-07 20:21:00 to 23-AUG-07 20:21:00 (EST-5)
Location: GROSSE PT WOODS
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported numerous trees and power lines down throughout the city.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 23-AUG-07 19:00:00 to 23-AUG-07 19:00:00 (EST-5)
Location: SOUTH LYON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated wind gusts at 60 MPH.

Thunderstorm Wind in MACOMB, MICHIGAN
From 23-AUG-07 19:40:00 to 23-AUG-07 19:40:00 (EST-5)
Location: WASHINGTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported tree limbs 2 to 3 inches in diameter down and estimated the wind gusts at 60 MPH.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 23-AUG-07 19:08:00 to 23-AUG-07 19:08:00 (EST-5)
Location: ANN ARBOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a tree down and estimated the wind gusts at 60 MPH.