Scattered thunderstorms tracked across Upper Michigan on the afternoon of the 14th ahead and along a warm frontal passage. A few of these storms produced large hail over Marquette, Alger and Luce counties.
A second round of severe storms developed in the evening coincident with a cold frontal passage. These storms producing large hail and damaging wind over the west half of Upper Michigan.

Hail in GOGEBIC, MICHIGAN
From 14-MAY-07 18:27:00 to 14-MAY-07 18:27:00 (CST-6)
Location: CISCO LAKE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter-sized hail.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 14-MAY-07 19:34:00 to 14-MAY-07 19:34:00 (EST-5)
Location: (SAW)KI SAWYER AFB G
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Reported by the KSAW tower.  Pea-sized hail also reported.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 14-MAY-07 18:47:00 to 14-MAY-07 18:47:00 (CST-6)
Location: WATERSMEET
Magnitude: 60.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Numerous trees blown down.

Thunderstorm Wind in IRON, MICHIGAN
From 14-MAY-07 19:20:00 to 14-MAY-07 19:20:00 (CST-6)
Location: IRON RIVER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several three-inch diameter branches blown down.

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:09:00 to 14-MAY-07 13:09:00 (EST-5)
Location: NATIONAL MINE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:10:00 to 14-MAY-07 13:10:00 (EST-5)
Location: NEGAUNEE
Magnitude: 3.00 
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most hailstones were half an inch to an inch and a half in diameter, but a few stones were three inches in diameter and shattered car windows.

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:12:00 to 14-MAY-07 13:12:00 (EST-5)
Location: NEGAUNEE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:30:00 to 14-MAY-07 13:30:00 (EST-5)
Location: HARVEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in ALGER, MICHIGAN
From 14-MAY-07 13:49:00 to 14-MAY-07 13:49:00 (EST-5)
Location: SAND RIVER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LUCE, MICHIGAN
From 14-MAY-07 15:42:00 to 14-MAY-07 15:42:00 (EST-5)
Location: NEWBERRY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Half an inch to an inch and a quarter diameter sized hail covered the ground.

Hail in IRON, MICHIGAN
From 14-MAY-07 19:22:00 to 14-MAY-07 19:22:00 (CST-6)
Location: IRON RIVER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 20:40:00 to 14-MAY-07 20:40:00 (EST-5)
Location: SKANDIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in DICKINSON, MICHIGAN
From 14-MAY-07 20:05:00 to 14-MAY-07 20:05:00 (CST-6)
Location: NORWAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Five-inch diameter tree limb down.

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 14-MAY-07 22:23:00 to 14-MAY-07 22:23:00 (CST-6)
Location: MENOMINEE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Top of a pine tree fell on a car on 48th Avenue along the north city limits of Menominee.

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 18:05:00 to 14-MAY-07 18:05:00 (EST-5)
Location: MARQUETTE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball sized hail reported along County Road 550 between the Big Garlic and Little Garlic Rivers.  Reported relayed via TV-6 in Marquette.

Hail in BARAGA, MICHIGAN
From 14-MAY-07 18:25:00 to 14-MAY-07 18:25:00 (EST-5)
Location: THREE LAKES
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 18:25:00 to 14-MAY-07 18:25:00 (EST-5)
Location: MICHIGAMME
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Hail in GOGEBIC, MICHIGAN
From 14-MAY-07 17:42:00 to 14-MAY-07 17:42:00 (CST-6)
Location: IRONWOOD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Some penny but mostly dime-sized hail.

Hail in GOGEBIC, MICHIGAN
From 14-MAY-07 18:10:00 to 14-MAY-07 18:10:00 (CST-6)
Location: MARENISCO
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Wind gusts to 50 mph.

Hail in GOGEBIC, MICHIGAN
From 14-MAY-07 18:10:00 to 14-MAY-07 18:10:00 (CST-6)
Location: MARENISCO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 12:55:00 to 14-MAY-07 12:55:00 (EST-5)
Location: ISHPEMING
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:00:00 to 14-MAY-07 13:00:00 (EST-5)
Location: ISHPEMING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:06:00 to 14-MAY-07 13:06:00 (EST-5)
Location: ISHPEMING
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:08:00 to 14-MAY-07 13:08:00 (EST-5)
Location: NEGAUNEE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 14-MAY-07 19:10:00 to 14-MAY-07 19:10:00 (EST-5)
Location: REPUBLIC
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Seven-inch diameter tree blown down onto guardrail on Highway M-95.

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 19:25:00 to 14-MAY-07 19:25:00 (EST-5)
Location: SANDS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Mostly dime...but a few nickel-sized hail.

Hail in GOGEBIC, MICHIGAN
From 14-MAY-07 17:50:00 to 14-MAY-07 17:50:00 (CST-6)
Location: BESSEMER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Dime to nickel-sized hail.

Hail in MARQUETTE, MICHIGAN
From 14-MAY-07 13:03:00 to 14-MAY-07 13:03:00 (EST-5)
Location: ISHPEMING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee