A supercell developed over far northern Saginaw late in the afternoon, then tracked southeast along a frontal boundary. This storm produced a swath of wind damage, large hail, and eventually spawning two tornadoes as it moved through Macomb County.

Tornado in MACOMB, MICHIGAN
From 19-AUG-10 18:29:00 to 19-AUG-10 18:35:00 (EST-5)
Location: UTICA ARPT
Tornado F-scale: EF1
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down near the intersection of 22 Mile and Hayes Road at 729 pm, tracking south-southeast before lifting at 735 pm just east of Hayes Road on M-59. Maximum winds were estimated to be up to 90 mph. Damage included multiple homes with roof damage, along with downed trees and power lines.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:20:00 to 19-AUG-10 18:20:00 (EST-5)
Location: MT VERNON
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees reported down in Stony Creek Metropark, along with boats blown over.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:45:00 to 19-AUG-10 18:45:00 (EST-5)
Location: WASHINGTON
Magnitude: 54.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and powerlines reported down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:45:00 to 19-AUG-10 18:45:00 (EST-5)
Location: MT CLEMENS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees blown down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-AUG-10 18:15:00 to 19-AUG-10 18:15:00 (EST-5)
Location: GOODISON
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees were blown down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-AUG-10 18:15:00 to 19-AUG-10 18:15:00 (EST-5)
Location: GOODISON
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees were blown down.

Hail in MACOMB, MICHIGAN
From 19-AUG-10 18:48:00 to 19-AUG-10 18:48:00 (EST-5)
Location: ROSEVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:25:00 to 19-AUG-10 18:25:00 (EST-5)
Location: DISCO
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees reported down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:25:00 to 19-AUG-10 18:25:00 (EST-5)
Location: UTICA ARPT
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were reported down.

Hail in MACOMB, MICHIGAN
From 19-AUG-10 18:25:00 to 19-AUG-10 18:25:00 (EST-5)
Location: DISCO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:22:00 to 19-AUG-10 18:22:00 (EST-5)
Location: WASHINGTON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and power lines were reported down.

Thunderstorm Wind in LAPEER, MICHIGAN
From 19-AUG-10 17:44:00 to 19-AUG-10 17:44:00 (EST-5)
Location: FARMERS CREEK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Trees were blown down in Hadley-Metamora State Park.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:21:00 to 19-AUG-10 18:21:00 (EST-5)
Location: MT VERNON
Magnitude: 65.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Widespread trees were blown down.

Hail in MACOMB, MICHIGAN
From 19-AUG-10 18:32:00 to 19-AUG-10 18:32:00 (EST-5)
Location: UTICA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 19-AUG-10 18:31:00 to 19-AUG-10 18:31:00 (EST-5)
Location: UTICA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 19-AUG-10 13:32:00 to 19-AUG-10 13:32:00 (EST-5)
Location: KINGSTON
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple trees were reported blown down.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 19-AUG-10 16:24:00 to 19-AUG-10 16:24:00 (EST-5)
Location: SAGINAW
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:31:00 to 19-AUG-10 18:31:00 (EST-5)
Location: UTICA
Magnitude: 55.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and powerlines were reported blown down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:31:00 to 19-AUG-10 18:31:00 (EST-5)
Location: DISCO
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were reported down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:32:00 to 19-AUG-10 18:32:00 (EST-5)
Location: UTICA ARPT
Magnitude: 64.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a 74 mph thunderstorm wind gust and reported trees down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:40:00 to 19-AUG-10 18:40:00 (EST-5)
Location: MT CLEMENS
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured a 70 mph thunderstorm wind gust.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 19-AUG-10 16:26:00 to 19-AUG-10 16:26:00 (EST-5)
Location: CARROLLTON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 19-AUG-10 16:33:00 to 19-AUG-10 16:33:00 (EST-5)
Location: BRIDGEPORT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 19-AUG-10 17:33:00 to 19-AUG-10 17:33:00 (EST-5)
Location: DAVISON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous tree limbs were reported down.

Thunderstorm Wind in LAPEER, MICHIGAN
From 19-AUG-10 17:34:00 to 19-AUG-10 17:34:00 (EST-5)
Location: LAPEER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were reported down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:45:00 to 19-AUG-10 18:45:00 (EST-5)
Location: (MTC)MT CLEMENS/SELF
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large trees blown down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:48:00 to 19-AUG-10 18:48:00 (EST-5)
Location: ROSEVILLE
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 MACOMB, MICHIGAN
From 19-AUG-10 18:48:00 to 19-AUG-10 18:48:00 (EST-5)
Location: MT CLEMENS
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large trees were uprooted as well as a tree snapped.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:46:00 to 19-AUG-10 18:46:00 (EST-5)
Location: MT CLEMENS
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree fell onto a house, causing significant damage.

Hail in SAGINAW, MICHIGAN
From 19-AUG-10 16:00:00 to 19-AUG-10 16:00:00 (EST-5)
Location: FREELAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in MACOMB, MICHIGAN
From 19-AUG-10 18:40:00 to 19-AUG-10 18:48:00 (EST-5)
Location: MT CLEMENS
Tornado F-scale: EF0
Property damage: 300.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado touched down on Dorchestour Court at 740 pm, just east of Romeo Plank and north of Canal  Road. The tornado tracked southeast before lifting at 748 pm just west of the intersection of 14 Mile Road and Harper Avenue. Maximum winds were estimated up to 85 mph. A few homes sustained window, garage, and shingle damage. Wooden fences were blown over. Numerous trees were blown down.

Hail in SAGINAW, MICHIGAN
From 19-AUG-10 16:28:00 to 19-AUG-10 16:28:00 (EST-5)
Location: BUENA VISTA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in TUSCOLA, MICHIGAN
From 19-AUG-10 16:55:00 to 19-AUG-10 16:55:00 (EST-5)
Location: TUSCOLA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 19-AUG-10 18:31:00 to 19-AUG-10 18:31:00 (EST-5)
Location: UTICA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GENESEE, MICHIGAN
From 19-AUG-10 17:35:00 to 19-AUG-10 17:35:00 (EST-5)
Location: DAVISON
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A steel flag pole was bent, along with damage to a roof.

Thunderstorm Wind in GENESEE, MICHIGAN
From 19-AUG-10 17:35:00 to 19-AUG-10 17:35:00 (EST-5)
Location: DAVISON
Magnitude: 55.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Numerous large trees limbs were reported down along with power lines.

Thunderstorm Wind in LAPEER, MICHIGAN
From 19-AUG-10 17:38:00 to 19-AUG-10 17:38:00 (EST-5)
Location: ELBA
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A roof was blown off a boat shop, along with boats flipped over.

Thunderstorm Wind in LAPEER, MICHIGAN
From 19-AUG-10 17:45:00 to 19-AUG-10 17:46:00 (EST-5)
Location: METAMORA
Magnitude: 65.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Dozens of trees down, along with large signs. A metal light post was also blown down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-AUG-10 18:03:00 to 19-AUG-10 18:06:00 (EST-5)
Location: OXFORD
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread trees down, with all trees in downtown Oxford damaged.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-AUG-10 18:03:00 to 19-AUG-10 18:06:00 (EST-5)
Location: OXFORD
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread trees down, with all trees in downtown Oxford damaged.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 19-AUG-10 18:07:00 to 19-AUG-10 18:07:00 (EST-5)
Location: LAKE ORION
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Eight to ten inch diameter tree limbs blown down.

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 19-AUG-10 13:30:00 to 19-AUG-10 13:30:00 (EST-5)
Location: KINGSTON
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported blown down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 19-AUG-10 18:25:00 to 19-AUG-10 18:25:00 (EST-5)
Location: ROMEO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous tree limbs were reported blown down.