During the afternoon of the 5th, thunderstorms initiated along a lake breeze (off Lake Michigan) in Southwest Lower Michigan. These thunderstorms then moved along a warm front which was located over Southeast Michigan. Thunderstorms produced mostly hail, with a few damaging wind gusts reported as well. The largest hail (golf ball size) occurred near Ann Arbor and Oxford. Wind Shear in the vicinity of the warm front produced numerous wall and funnel clouds. One tornado did occur near Leonard in Oakland County. It was reported a couple thousand homes and businesses lost power during the storms.

Hail in GENESEE, MICHIGAN
From 05-MAY-03 17:43:00 to 05-MAY-03 17:43:00 (EST)
Location: LINDEN
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WAYNE, MICHIGAN
From 05-MAY-03 18:52:00 to 05-MAY-03 18:52:00 (EST)
Location: INKSTER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in LAPEER, MICHIGAN
From 05-MAY-03 18:55:00 to 05-MAY-03 18:55:00 (EST)
Location: ALMONT
Magnitude: 1.00 
Reported by: LAW ENFORCEMENT

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 18:03:00 to 05-MAY-03 18:03:00 (EST)
Location: ANN ARBOR
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in ST. CLAIR, MICHIGAN
From 05-MAY-03 19:25:00 to 05-MAY-03 19:25:00 (EST)
Location: EMMETT
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

A trained spotter reported several large trees blown down in thunderstorm winds.

Thunderstorm Wind in GENESEE, MICHIGAN
From 05-MAY-03 17:43:00 to 05-MAY-03 17:43:00 (EST)
Location: LINDEN
Magnitude: 70 EG
Property damage: 5K
Reported by: BROADCAST MEDIA

Thunderstorm winds blew a trailer several feet from its foundation, blew in a garage door, knocked several large trees over, destroyed a swing set, and blew some shingles off of roofs.

Hail in GENESEE, MICHIGAN
From 05-MAY-03 18:25:00 to 05-MAY-03 18:25:00 (EST)
Location: DAVISON
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 17:54:00 to 05-MAY-03 18:00:00 (EST)
Location: CHELSEA
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 17:54:00 to 05-MAY-03 17:54:00 (EST)
Location: DEXTER
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in GENESEE, MICHIGAN
From 05-MAY-03 18:03:00 to 05-MAY-03 18:03:00 (EST)
Location: GRAND BLANC
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GENESEE, MICHIGAN
From 05-MAY-03 18:03:00 to 05-MAY-03 18:03:00 (EST)
Location: GRAND BLANC
Magnitude: 65 EG
Reported by: TRAINED SPOTTER

Hail in LAPEER, MICHIGAN
From 05-MAY-03 18:30:00 to 05-MAY-03 18:30:00 (EST)
Location: METAMORA
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in TUSCOLA, MICHIGAN
From 05-MAY-03 18:30:00 to 05-MAY-03 18:30:00 (EST)
Location: MAYVILLE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in OAKLAND, MICHIGAN
From 05-MAY-03 18:37:00 to 05-MAY-03 18:37:00 (EST)
Location: OXFORD
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in SHIAWASSEE, MICHIGAN
From 05-MAY-03 17:10:00 to 05-MAY-03 17:10:00 (EST)
Location: PERRY
Magnitude: 50 EG
Reported by: TRAINED SPOTTER

A trained spotter reported 3 to 6 inch diameter tree limbs blown down in thunderstorm winds.

Hail in GENESEE, MICHIGAN
From 05-MAY-03 18:05:00 to 05-MAY-03 18:05:00 (EST)
Location: THETFORD CENTER
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 17:43:00 to 05-MAY-03 17:43:00 (EST)
Location: CHELSEA
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in OAKLAND, MICHIGAN
From 05-MAY-03 18:30:00 to 05-MAY-03 18:30:00 (EST)
Location: OXFORD
Magnitude: 1.75 
Reported by: LAW ENFORCEMENT

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 18:15:00 to 05-MAY-03 18:15:00 (EST)
Location: ANN ARBOR
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 18:06:00 to 05-MAY-03 18:06:00 (EST)
Location: DEXTER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Hail in WASHTENAW, MICHIGAN
From 05-MAY-03 18:15:00 to 05-MAY-03 18:15:00 (EST)
Location: ANN ARBOR
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Hail in WAYNE, MICHIGAN
From 05-MAY-03 18:45:00 to 05-MAY-03 18:45:00 (EST)
Location: REDFORD
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Hail in OAKLAND, MICHIGAN
From 05-MAY-03 18:50:00 to 05-MAY-03 18:50:00 (EST)
Location: TROY
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Tornado in OAKLAND, MICHIGAN
From 05-MAY-03 19:00:00 to 05-MAY-03 19:12:00 (EST)
Location: LEONARD
Tornado F-scale: F1
Property damage: 90K
Reported by: NWS STORM SURVEY

A tornado touched down 1 mile southwest of Leonard and was on the ground for about 1 mile. Several large trees were uprooted from the tornado. A large pole barn was destroyed, a camper and trailer were overturned, the roof on a home was lifted off, and a truck was heavily damaged when a large tree fell onto it. The most extensive damage was reported on Quattro Lane, south of Leonard.

Hail in GENESEE, MICHIGAN
From 05-MAY-03 18:17:00 to 05-MAY-03 18:17:00 (EST)
Location: BURTON
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GENESEE, MICHIGAN
From 05-MAY-03 18:17:00 to 05-MAY-03 18:17:00 (EST)
Location: BURTON
Magnitude: 61 EG
Reported by: TRAINED SPOTTER

Hail in GENESEE, MICHIGAN
From 05-MAY-03 17:45:00 to 05-MAY-03 17:45:00 (EST)
Location: FLINT
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Hail in GENESEE, MICHIGAN
From 05-MAY-03 17:50:00 to 05-MAY-03 17:50:00 (EST)
Location: FENTON
Magnitude: 0.75 
Reported by: TRAINED SPOTTER