A cold front moving across Michigan's Upper Peninsula on July 21 interacted with a moist and unstable airmass to set off thunderstorms during the late afternoon and evening.  Some of the storms produced large hail, high winds and heavy rain.

Thunderstorm Wind in DELTA, MICHIGAN
From 21-JUL-02 18:50:00 to 21-JUL-02 18:50:00 (EST)
Location: ROCK
Magnitude: 55 E
Reported by: TRAINED SPOTTER

Tree branches up to three inches in diameter were broken off.

Flood in MARQUETTE, MICHIGAN
From 21-JUL-02 18:15:00 to 21-JUL-02 19:30:00 (EST)
Location: MARQUETTE
Reported by: LAW ENFORCEMENT

Tourist park flooded with 3 to 5 inches of water over the roads.

Thunderstorm Wind in ALGER, MICHIGAN
From 21-JUL-02 18:04:00 to 21-JUL-02 18:04:00 (EST)
Location: MUNISING
Magnitude: 55 E
Reported by: TRAINED SPOTTER

One to two inch diameter tree branches were broken off.

Hail in MARQUETTE, MICHIGAN
From 21-JUL-02 16:45:00 to 21-JUL-02 16:45:00 (EST)
Location: REPUBLIC
Magnitude: 2.00 
Reported by: TRAINED SPOTTER

Two inch hail was reported.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 21-JUL-02 17:00:00 to 21-JUL-02 17:00:00 (EST)
Location: ISHPEMING
Magnitude: 60 E
Reported by: TRAINED SPOTTER

One to two foot diameter trees were blown down.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 21-JUL-02 15:33:00 to 21-JUL-02 15:33:00 (EST)
Location: BRUCE CROSSING
Magnitude: 65 E
Reported by: DEPT OF HIGHWAYS

Six trees were blown down along highway U.S. 45.

Hail in IRON, MICHIGAN
From 21-JUL-02 16:00:00 to 21-JUL-02 16:00:00 (CST)
Location: CRYSTAL FALLS
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny sized hail was reported.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 21-JUL-02 17:20:00 to 21-JUL-02 17:20:00 (EST)
Location: SAWYER AFB
Magnitude: 70 E
Reported by: EMERGENCY MANAGER

Numerous 1 to 2 foot diameter trees blown down or broken off.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 21-JUL-02 17:20:00 to 21-JUL-02 17:20:00 (EST)
Location: MARQUETTE
Magnitude: 70 E
Reported by: EMERGENCY MANAGER

Sixty foot tall trees blown down. Power lines were knocked down.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 21-JUL-02 15:43:00 to 21-JUL-02 15:43:00 (EST)
Location: KENTON
Magnitude: 65 E
Reported by: DEPT OF HIGHWAYS

Fourteen trees were blown down along the roadway.

Hail in BARAGA, MICHIGAN
From 21-JUL-02 16:22:00 to 21-JUL-02 16:22:00 (EST)
Location: THREE LAKES
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Golfball sized hail was reported.

Thunderstorm Wind in DICKINSON, MICHIGAN
From 21-JUL-02 16:30:00 to 21-JUL-02 16:30:00 (CST)
Location: IRON MTN
Magnitude: 65 E
Reported by: DEPT OF HIGHWAYS

Two foot diameter tree blown down.

Thunderstorm Wind in IRON, MICHIGAN
From 21-JUL-02 16:15:00 to 21-JUL-02 16:15:00 (CST)
Location: ALPHA
Magnitude: 65 E
Reported by: TRAINED SPOTTER

Numerous trees were blown down.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 21-JUL-02 17:40:00 to 21-JUL-02 17:40:00 (EST)
Location: MARQUETTE
Magnitude: 70 E
Reported by: TRAINED SPOTTER

Numerous 1 to 2 foot diameter trees blown down or broken off.

Funnel Cloud in ALGER, MICHIGAN
From 21-JUL-02 18:09:00 to 21-JUL-02 18:09:00 (EST)
Location: SHINGLETON
Reported by: TRAINED SPOTTER

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 21-JUL-02 17:09:00 to 21-JUL-02 17:09:00 (CST)
Location: CARNEY
Magnitude: 55 E
Reported by: TRAINED SPOTTER

One to two inch diameter tree branches were broken off.

Hail in BARAGA, MICHIGAN
From 21-JUL-02 16:22:00 to 21-JUL-02 16:22:00 (EST)
Location: THREE LAKES
Magnitude: 1.75 
Reported by: GENERAL PUBLIC

Golfball sized hail was reported.

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 21-JUL-02 17:09:00 to 21-JUL-02 17:09:00 (CST)
Location: INGALLS
Magnitude: 65 E
Reported by: FIRE DEPT/RESCUE SQUAD

Several large trees and power lines were blown down.

Thunderstorm Wind in ALGER, MICHIGAN
From 21-JUL-02 18:14:00 to 21-JUL-02 18:14:00 (EST)
Location: SHINGLETON
Magnitude: 60 E
Reported by: GENERAL PUBLIC

Four-inch diameter tree branches were broken off.

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 21-JUL-02 17:09:00 to 21-JUL-02 17:09:00 (CST)
Location: STEPHENSON
Magnitude: 65 E
Reported by: TRAINED SPOTTER

Several large trees were blown down.

Thunderstorm Wind in SCHOOLCRAFT, MICHIGAN
From 21-JUL-02 18:42:00 to 21-JUL-02 18:42:00 (EST)
Location: GULLIVER
Magnitude: 55 E
Reported by: GENERAL PUBLIC

One to two inch diameter tree branches were broken off.

Thunderstorm Wind in DELTA, MICHIGAN
From 21-JUL-02 18:14:00 to 21-JUL-02 18:14:00 (EST)
Location: RAPID RIVER
Magnitude: 55 E
Reported by: LAW ENFORCEMENT

One to two inch diameter tree branches were broken off.

Thunderstorm Wind in LUCE, MICHIGAN
From 21-JUL-02 19:14:00 to 21-JUL-02 19:14:00 (EST)
Location: NEWBERRY
Magnitude: 55 E
Reported by: BROADCAST MEDIA

One to two inch diameter tree branches were broken off.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 21-JUL-02 15:03:00 to 21-JUL-02 15:03:00 (CST)
Location: WATERSMEET
Magnitude: 55 E
Reported by: GENERAL PUBLIC

A ten inch diameter tree branch was broken off.