A few severe storms developed, mainly north of M-59 during the late afternoon and evening hours. Training of showers and thunderstorms then dumped half a foot of rain on the Flint area, stranding cars on roadways and forcing the boat evacuation of some residents.

Hail in HURON, MICHIGAN
From 03-MAY-12 16:01:00 to 03-MAY-12 16:01:00 (EST-5)
Location: QUARRY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in HURON, MICHIGAN
From 03-MAY-12 16:03:00 to 03-MAY-12 16:03:00 (EST-5)
Location: KINDE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BAY, MICHIGAN
From 03-MAY-12 16:19:00 to 03-MAY-12 16:19:00 (EST-5)
Location: BAY CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GENESEE, MICHIGAN
From 03-MAY-12 17:39:00 to 03-MAY-12 17:39:00 (EST-5)
Location: FLUSHING ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 03-MAY-12 21:46:00 to 03-MAY-12 21:46:00 (EST-5)
Location: MANCHESTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHTENAW, MICHIGAN
From 03-MAY-12 21:54:00 to 03-MAY-12 21:54:00 (EST-5)
Location: ROWES CORNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 03-MAY-12 17:22:00 to 03-MAY-12 17:22:00 (EST-5)
Location: OWOSSO
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and wires reported down.

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 03-MAY-12 16:11:00 to 03-MAY-12 16:11:00 (EST-5)
Location: GILFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Utility pole was reported down.

Thunderstorm Wind in TUSCOLA, MICHIGAN
From 03-MAY-12 16:56:00 to 03-MAY-12 16:56:00 (EST-5)
Location: DEFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree limbs were reported blown down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:38:00 to 03-MAY-12 17:38:00 (EST-5)
Location: (FNT)BISHOP ARPT FLI
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A eight inch diameter tree was blown down, destroying a shed.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:43:00 to 03-MAY-12 17:43:00 (EST-5)
Location: BURTON
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter estimated a 70 mph thunderstorm wind gust.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:40:00 to 03-MAY-12 17:40:00 (EST-5)
Location: (FNT)BISHOP ARPT FLI
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 45 foot tower was blown down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:41:00 to 03-MAY-12 17:41:00 (EST-5)
Location: (FNT)BISHOP ARPT FLI
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A small airplane was blown over.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:39:00 to 03-MAY-12 17:39:00 (EST-5)
Location: (FNT)BISHOP ARPT FLI
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter reported a garage collapsed.

Thunderstorm Wind in WASHTENAW, MICHIGAN
From 03-MAY-12 21:52:00 to 03-MAY-12 21:52:00 (EST-5)
Location: SYLVAN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several six to eight inch diameter tree limbs blown down onto M-52.

Thunderstorm Wind in LIVINGSTON, MICHIGAN
From 03-MAY-12 22:08:00 to 03-MAY-12 22:08:00 (EST-5)
Location: HOWELL
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wires were reported down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:42:00 to 03-MAY-12 17:42:00 (EST-5)
Location: FLINT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down.

Thunderstorm Wind in GENESEE, MICHIGAN
From 03-MAY-12 17:40:00 to 03-MAY-12 17:40:00 (EST-5)
Location: FLINT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Two to three foot trees were reported snapped.

Flood in SHIAWASSEE, MICHIGAN
From 04-MAY-12 07:54:00 to 04-MAY-12 14:00:00 (EST-5)
Location: MORRICE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash flooding from 4 to 7 inches of rain took half a day to recede.

Flash Flood in SHIAWASSEE, MICHIGAN
From 04-MAY-12 01:30:00 to 04-MAY-12 07:54:00 (EST-5)
Location: WEST FIVE PTS
Flood cause: Heavy Rain
Property damage: 1.10M
Crop damage: 0.00K
Reported by: Emergency Manager

Several roads were closed due to flooding as well as bridges being reported washed out.

Flood in GENESEE, MICHIGAN
From 04-MAY-12 07:54:00 to 04-MAY-12 14:00:00 (EST-5)
Location: ARGENTINE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash flooding from 4 to 7 inches of rain took half a day to recede.

Flash Flood in GENESEE, MICHIGAN
From 04-MAY-12 01:30:00 to 04-MAY-12 07:54:00 (EST-5)
Location: LENNON
Flood cause: Heavy Rain
Property damage: 7.10M
Crop damage: 0.00K
Reported by: Broadcast Media

Four to seven inches of rain falling in less than 12 hours lead to extensive flooding.
Flint Bishop Airport reported 5.62 inches. Dozens of homes flooded with numerous roads shut down, including sections of I-75 and I-69. Especially hard hit was Swartz Creek and Flint Township. Residents of Apple Creek Apartment in Swartz Creek had to evacuate. In Grand Blanc Township, Knollwood Apartments, located off of Hill Road, saw the worst of the damage. The far eastern side of the apartment complex saw the bulk of the damage, with water nearly submerging at least 30 cars, flooding basements, damaging first floors and knocking out the power. The total cost to Knollwood for the damage was more than $1.7 million.

Hail in BAY, MICHIGAN
From 03-MAY-12 15:17:00 to 03-MAY-12 15:17:00 (EST-5)
Location: BENTLEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BAY, MICHIGAN
From 03-MAY-12 15:30:00 to 03-MAY-12 15:30:00 (EST-5)
Location: MT FOREST
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MIDLAND, MICHIGAN
From 03-MAY-12 15:54:00 to 03-MAY-12 15:54:00 (EST-5)
Location: BOMBAY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BAY, MICHIGAN
From 03-MAY-12 15:55:00 to 03-MAY-12 15:55:00 (EST-5)
Location: BEAVER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public