Numerous thunderstorms developed in a warm, moist, and unstable atmosphere ahead of a cold front.  A number of storms became severe, mainly in Northeast Lower Michigan.  A cluster of storms that moved through Eastern Upper Michigan in the morning produced locally heavy rain and some flooding.

Thunderstorm Wind in ALCONA, MICHIGAN
From 02-AUG-04 14:45:00 to 02-AUG-04 14:45:00 (EST)
Location: MIKADO
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Trees were downed.

Hail in OSCODA, MICHIGAN
From 02-AUG-04 14:45:00 to 02-AUG-04 14:45:00 (EST)
Location: LUZERNE
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Flash Flood in MACKINAC, MICHIGAN
From 02-AUG-04 10:45:00 to 02-AUG-04 10:59:00 (EST)
Location: EPOUFETTE
Property damage: 40K
Reported by: LAW ENFORCEMENT

Heavy rain swelled the Cut River in central Mackinac County.  The river washed out part of the west approach to the bridge that carried US-2 across the river.  A portion of Epoufette Bay Road was also washed out.

Flash Flood in MACKINAC, MICHIGAN
From 02-AUG-04 11:00:00 to 02-AUG-04 12:30:00 (EST)
Location: EPOUFETTE
Reported by: LAW ENFORCEMENT

The flooding (see earlier report) took about an hour and a half to disperse.

Thunderstorm Wind in ROSCOMMON, MICHIGAN
From 02-AUG-04 15:15:00 to 02-AUG-04 15:15:00 (EST)
Location: HOUGHTON LAKE
Magnitude: 50 EG
Property damage: 5K
Reported by: LAW ENFORCEMENT

A pontoon boat was ripped off a hoist and flipped over.

Hail in IOSCO, MICHIGAN
From 02-AUG-04 16:07:00 to 02-AUG-04 16:07:00 (EST)
Location: OSCODA
Magnitude: 1.00 
Reported by: OTHER FEDERAL AGENCY

Thunderstorm Wind in OGEMAW, MICHIGAN
From 02-AUG-04 15:53:00 to 02-AUG-04 15:53:00 (EST)
Location: CLEAR LAKE
Magnitude: 52 EG
Property damage: 15K
Reported by: EMERGENCY MANAGER

Several trees were downed, one onto a home.

Thunderstorm Wind in IOSCO, MICHIGAN
From 02-AUG-04 16:53:00 to 02-AUG-04 16:53:00 (EST)
Location: HALE
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Trees were downed.

Thunderstorm Wind in ALPENA, MICHIGAN
From 02-AUG-04 13:40:00 to 02-AUG-04 13:40:00 (EST)
Location: HUBBARD LAKE
Magnitude: 52 EG
Reported by: TRAINED SPOTTER

Tree limbs were downed.

Hail in ALPENA, MICHIGAN
From 02-AUG-04 13:26:00 to 02-AUG-04 13:26:00 (EST)
Location: HERRON
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in ALCONA, MICHIGAN
From 02-AUG-04 14:00:00 to 02-AUG-04 14:00:00 (EST)
Location: GLENNIE
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Several trees were downed.

Hail in CHEBOYGAN, MICHIGAN
From 02-AUG-04 12:50:00 to 02-AUG-04 12:50:00 (EST)
Location: TOWER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in PRESQUE ISLE, MICHIGAN
From 02-AUG-04 12:35:00 to 02-AUG-04 12:40:00 (EST)
Location: HAWKS
Magnitude: 1.50 
Reported by: TRAINED SPOTTER

Hail in PRESQUE ISLE, MICHIGAN
From 02-AUG-04 12:59:00 to 02-AUG-04 12:59:00 (EST)
Location: ONAWAY
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in ALPENA, MICHIGAN
From 02-AUG-04 13:26:00 to 02-AUG-04 13:40:00 (EST)
Location: HUBBARD LAKE
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in IOSCO, MICHIGAN
From 02-AUG-04 15:11:00 to 02-AUG-04 15:11:00 (EST)
Location: EAST TAWAS
Magnitude: 52 EG
Reported by: LAW ENFORCEMENT

Several trees were downed.

Thunderstorm Wind in ARENAC, MICHIGAN
From 02-AUG-04 16:45:00 to 02-AUG-04 16:45:00 (EST)
Location: TURNER
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Trees were downed.