A very moist unstable airmass was in place across southeast Michigan as a warm front had passed through the area the previous night. Storms developed out to the west along a cold front and moved through the area as an organized line of storms during the afternoon hours.  Numerous reports of tree damage were associated with the damaging wind gusts, with a few reports of large hail.  Heavy rain produced flooding in St. Clair County which continued during the overnight hours.

Flood in ST. CLAIR, MICHIGAN
From 22-JUN-11 17:00:00 to 23-JUN-11 14:00:00 (EST-5)
Location: YALE
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Central dispatch reported numerous roads closed and washed out. There was a substantial amount of flooding in Burtchville, Fort Gratiot, and the northeastern townships. Up to 100 homes received some form of flood damage, as the rain overwhelmed the drainage system.

Hail in SHIAWASSEE, MICHIGAN
From 22-JUN-11 13:20:00 to 22-JUN-11 13:20:00 (EST-5)
Location: LAINGSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Lightning in ST. CLAIR, MICHIGAN
From 22-JUN-11 17:54:00 to 22-JUN-11 17:54:00 (EST-5)
Location: PORT HURON ARPT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A 30 year old woman was struck by lighting as she tried to enter her automobile. She become unconscious and was not breathing. CPR was performed. She was transported to the hospital and did survive.

Hail in OAKLAND, MICHIGAN
From 22-JUN-11 14:36:00 to 22-JUN-11 14:36:00 (EST-5)
Location: CLARKSTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 22-JUN-11 15:37:00 to 22-JUN-11 15:37:00 (EST-5)
Location: MEMPHIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MACOMB, MICHIGAN
From 22-JUN-11 15:00:00 to 22-JUN-11 15:00:00 (EST-5)
Location: WASHINGTON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 22-JUN-11 15:20:00 to 22-JUN-11 15:20:00 (EST-5)
Location: ARMADA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in LENAWEE, MICHIGAN
From 22-JUN-11 13:00:00 to 22-JUN-11 13:00:00 (EST-5)
Location: CEMENT CITY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tree limbs reported down.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 22-JUN-11 13:25:00 to 22-JUN-11 13:25:00 (EST-5)
Location: SAGINAW
Magnitude: 54.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous six to eight inch diameter trees reported down.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 22-JUN-11 13:30:00 to 22-JUN-11 13:30:00 (EST-5)
Location: SAGINAW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two large trees reported down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 22-JUN-11 13:56:00 to 22-JUN-11 13:56:00 (EST-5)
Location: SWARTZ CREEK
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Many large trees blown down across roads and houses.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 22-JUN-11 14:20:00 to 22-JUN-11 14:20:00 (EST-5)
Location: OXBOW
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 22-JUN-11 14:43:00 to 22-JUN-11 14:43:00 (EST-5)
Location: FAIRGROVE
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. Small tree branches were blown down .

Thunderstorm Wind in LAPEER, MICHIGAN
From 22-JUN-11 14:43:00 to 22-JUN-11 14:43:00 (EST-5)
Location: HUNTERS CREEK
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A barn roof was blown off, along with numerous trees blown down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 22-JUN-11 15:44:00 to 22-JUN-11 15:44:00 (EST-5)
Location: SWARTZ CREEK
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in MACOMB, MICHIGAN
From 22-JUN-11 16:10:00 to 22-JUN-11 16:10:00 (EST-5)
Location: MT CLEMENS
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated 65 mph thunderstorm wind gust.

Thunderstorm Wind in SAGINAW, MICHIGAN
From 22-JUN-11 15:46:00 to 22-JUN-11 15:46:00 (EST-5)
Location: BURT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GENESEE, MICHIGAN
From 22-JUN-11 15:45:00 to 22-JUN-11 15:45:00 (EST-5)
Location: FLINT
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in SAGINAW, MICHIGAN
From 22-JUN-11 15:58:00 to 22-JUN-11 15:58:00 (EST-5)
Location: FRANKENMUTH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree limb was blown down.

Thunderstorm Wind in OAKLAND, MICHIGAN
From 22-JUN-11 15:46:00 to 22-JUN-11 15:46:00 (EST-5)
Location: BERKLEY
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree fell onto a car.

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 22-JUN-11 13:38:00 to 22-JUN-11 13:38:00 (EST-5)
Location: BYRON
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was reported blown down.

Thunderstorm Wind in BAY, MICHIGAN
From 22-JUN-11 16:00:00 to 22-JUN-11 16:00:00 (EST-5)
Location: BAY CITY
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree limbs were reported blown down.

Thunderstorm Wind in HURON, MICHIGAN
From 22-JUN-11 14:34:00 to 22-JUN-11 14:34:00 (EST-5)
Location: SEBEWAING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Three to four inch diameter tree branches reported down.

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 22-JUN-11 16:24:00 to 22-JUN-11 16:24:00 (EST-5)
Location: LAKEPORT
Magnitude: 56.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and powerlines reported down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 22-JUN-11 17:17:00 to 22-JUN-11 17:17:00 (EST-5)
Location: MEADE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported blown down.

Thunderstorm Wind in MACOMB, MICHIGAN
From 22-JUN-11 17:30:00 to 22-JUN-11 17:30:00 (EST-5)
Location: MT CLEMENS
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was reported blown down.

Thunderstorm Wind in BAY, MICHIGAN
From 22-JUN-11 13:45:00 to 22-JUN-11 13:45:00 (EST-5)
Location: BAY CITY MUNI ARPT
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large tree was uprooted.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 22-JUN-11 16:20:00 to 22-JUN-11 16:20:00 (EST-5)
Location: YPSILANTI
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A large tree was uprooted and fell onto a house.

Hail in SAGINAW, MICHIGAN
From 22-JUN-11 13:30:00 to 22-JUN-11 13:30:00 (EST-5)
Location: SAGINAW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 22-JUN-11 16:25:00 to 22-JUN-11 16:25:00 (EST-5)
Location: PORT HURON ARPT
Magnitude: 65.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A NWS storm survey team determined the damage produced in Fort Gratiot was a result of straight line winds estimated up to 75 mph. The damage occured along a 200 yard section of Keewahdin road and included: a shed that was blown over, a car which was moved in a parking lot, two wooden powerline poles that were partially snapped and downed tree limbs from two hardwood trees.

Hail in SAGINAW, MICHIGAN
From 22-JUN-11 13:25:00 to 22-JUN-11 13:25:00 (EST-5)
Location: SAGINAW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in SAGINAW, MICHIGAN
From 22-JUN-11 13:30:00 to 22-JUN-11 13:30:00 (EST-5)
Location: BRIDGEPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SHAVE Project

Hail in GENESEE, MICHIGAN
From 22-JUN-11 14:11:00 to 22-JUN-11 14:11:00 (EST-5)
Location: FLINT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MACOMB, MICHIGAN
From 22-JUN-11 15:15:00 to 22-JUN-11 15:15:00 (EST-5)
Location: ARMADA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WAYNE, MICHIGAN
From 22-JUN-11 15:40:00 to 22-JUN-11 15:40:00 (EST-5)
Location: HIGHLAND PARK
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several downed trees on the west side of Detroit.

Thunderstorm Wind in GENESEE, MICHIGAN
From 22-JUN-11 15:50:00 to 22-JUN-11 15:50:00 (EST-5)
Location: ELMCREST
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large tree limbs reported down.

Hail in ST. CLAIR, MICHIGAN
From 22-JUN-11 16:25:00 to 22-JUN-11 16:25:00 (EST-5)
Location: GARDENDALE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LAPEER, MICHIGAN
From 22-JUN-11 16:40:00 to 22-JUN-11 16:40:00 (EST-5)
Location: ALMONT
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Small trees were reported blown down.