Widespread severe thunderstorms struck Upper Michigan on August 1st as a strong surface low pressure center moved northeast into Ontario and its attendant warm and cold fronts interacted with a warm, moist and unstable airmass over the northwest Great Lakes. Thunderstorms first developed in Upper Michigan during the pre-dawn hours over the west, then continued off and on through the day before exiting Luce and Schoolcraft Counties late in the afternoon.  There were numerous reports of wind damage, large hail, and torrential flooding rains. Wind gusts estimated as high as 80 mph near Houghton peeled a roof off a warehouse, overturned a truck, and downed numerous trees and power lines. One  thunderstorm bombarded Escanaba with golf ball-sized hail and dropped enough rain to inundate the intersection of US-2, M-35, and US-41 with a foot of water. Nearby Gladstone measured 2.06 inches of rain...and Wetmore in Alger County logged 2.40 inches in a short time.

Thunderstorm Wind in LUCE, MICHIGAN
From 01-AUG-02 07:00:00 to 01-AUG-02 07:00:00 (EST)
Location: NEWBERRY
Magnitude: 52 E
Reported by: TRAINED SPOTTER

A 60 mph wind gust  broke off a 16 inch diameter tree branch that fell on a motor home.

Hail in IRON, MICHIGAN
From 01-AUG-02 12:09:00 to 01-AUG-02 12:09:00 (EST)
Location: AMASA
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Quarter sized hail was reported.

Hail in GOGEBIC, MICHIGAN
From 01-AUG-02 11:50:00 to 01-AUG-02 11:50:00 (EST)
Location: WATERSMEET
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

Walnut sized hail covered the ground.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 01-AUG-02 11:45:00 to 01-AUG-02 11:45:00 (EST)
Location: WATERSMEET
Magnitude: 70 E
Reported by: GENERAL PUBLIC

Numerous trees and power lines were down along US-45.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 01-AUG-02 06:15:00 to 01-AUG-02 06:15:00 (EST)
Location: HARVEY
Magnitude: 52 E
Reported by: TRAINED SPOTTER

A one foot diameter tree was blown down across power lines.

Hail in DICKINSON, MICHIGAN
From 01-AUG-02 06:35:00 to 01-AUG-02 06:35:00 (EST)
Location: GRANITE BLUFF
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Three quarter inch hail was reported.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 01-AUG-02 05:27:00 to 01-AUG-02 05:27:00 (EST)
Location: WATERSMEET
Magnitude: 61 E
Reported by: LAW ENFORCEMENT

A two foot diameter pine tree was blown down across power lines.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 01-AUG-02 12:03:00 to 01-AUG-02 12:03:00 (EST)
Location: MICHIGAMME
Magnitude: 60 E
Reported by: GENERAL PUBLIC

Large trees were blown down on Brooks Street.

Thunderstorm Wind in IRON, MICHIGAN
From 01-AUG-02 12:55:00 to 01-AUG-02 12:55:00 (EST)
Location: AMASA
Magnitude: 70 E
Reported by: GENERAL PUBLIC

Several small trees were snapped off and 8 inch diameter branches were broken off.

Hail in MARQUETTE, MICHIGAN
From 01-AUG-02 08:50:00 to 01-AUG-02 08:50:00 (EST)
Location: REPUBLIC
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Three quarter inch hail was reported.

Hail in DELTA, MICHIGAN
From 01-AUG-02 07:36:00 to 01-AUG-02 07:36:00 (EST)
Location: ESCANABA
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golf ball sized hail was reported.

Flash Flood in DELTA, MICHIGAN
From 01-AUG-02 08:39:00 to 01-AUG-02 10:45:00 (EST)
Location: ESCANABA
Reported by: LAW ENFORCEMENT

Heavy rain flooded the intersection  of US-2, M-35 and US-41 with a foot of water.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 01-AUG-02 05:00:00 to 01-AUG-02 05:00:00 (EST)
Location: DOLLAR BAY
Magnitude: 52 E
Reported by: TRAINED SPOTTER

Six inch diameter trees were blown down.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 01-AUG-02 05:20:00 to 01-AUG-02 05:20:00 (EST)
Location: WATERSMEET
Magnitude: 61 E
Reported by: LAW ENFORCEMENT

Trees were blown down across power lines.

Hail in BARAGA, MICHIGAN
From 01-AUG-02 05:18:00 to 01-AUG-02 05:18:00 (EST)
Location: COVINGTON
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

One inch hail was reported.

Hail in DELTA, MICHIGAN
From 01-AUG-02 08:00:00 to 01-AUG-02 08:00:00 (EST)
Location: BARK RIVER
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Nickel sized hail was reported.

Hail in GOGEBIC, MICHIGAN
From 01-AUG-02 10:15:00 to 01-AUG-02 10:15:00 (EST)
Location: WATERSMEET
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

One inch hail was reported.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 01-AUG-02 05:55:00 to 01-AUG-02 05:55:00 (EST)
Location: MARQUETTE
Magnitude: 54 M
Reported by: OFFICIAL NWS OBS.

A 62 mph wind gust was recorded.

Thunderstorm Wind in KEWEENAW, MICHIGAN
From 01-AUG-02 05:08:00 to 01-AUG-02 05:19:00 (EST)
Location: EAGLE HARBOR
Magnitude: 70 E
Reported by: EMERGENCY MANAGER

Trees were downed at Eagle Harbor, Lac La Belle, Copper Harbor, Gay and Eagle River.

Hail in MARQUETTE, MICHIGAN
From 01-AUG-02 06:06:00 to 01-AUG-02 06:06:00 (EST)
Location: HARVEY
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Three quarter inch hail was reported.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 01-AUG-02 06:55:00 to 01-AUG-02 06:55:00 (EST)
Location: WATSON
Magnitude: 60 E
Reported by: NWS STORM SURVEY

Four inch diameter branches were broken off.

Hail in IRON, MICHIGAN
From 01-AUG-02 11:30:00 to 01-AUG-02 11:30:00 (EST)
Location: IRON RIVER
Magnitude: 1.50 
Reported by: GENERAL PUBLIC

Golf ball sized hail was reported.

Thunderstorm Wind in DELTA, MICHIGAN
From 01-AUG-02 14:50:00 to 01-AUG-02 14:50:00 (EST)
Location: NAHMA
Magnitude: 65 E
Reported by: GENERAL PUBLIC

Numerous trees were blown down.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 01-AUG-02 05:00:00 to 01-AUG-02 05:00:00 (EST)
Location: BRUCE CROSSING
Magnitude: 52 E
Reported by: LAW ENFORCEMENT

Winds to 60 mph blew down numerous trees and power lines.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 01-AUG-02 04:53:00 to 01-AUG-02 04:53:00 (EST)
Location: DONKEN
Magnitude: 61 E
Reported by: TRAINED SPOTTER

A wind gust to 70 mph brought down trees across Highway 26 and knocked down electric power and telephone lines.

Thunderstorm Wind in BARAGA, MICHIGAN
From 01-AUG-02 11:55:00 to 01-AUG-02 11:55:00 (EST)
Location: THREE LAKES
Magnitude: 70 E
Reported by: GENERAL PUBLIC

Numerous 18 inch diameter trees were blown down.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 01-AUG-02 05:25:00 to 01-AUG-02 05:25:00 (EST)
Location: KENTON
Magnitude: 65 E
Reported by: TRAINED SPOTTER

Numerous trees were blown down.

Thunderstorm Wind in SCHOOLCRAFT, MICHIGAN
From 01-AUG-02 14:52:00 to 01-AUG-02 14:52:00 (EST)
Location: STEUBEN
Magnitude: 65 E
Reported by: GENERAL PUBLIC

A one foor diameter tree was blown down.

Thunderstorm Wind in IRON, MICHIGAN
From 01-AUG-02 05:25:00 to 01-AUG-02 05:25:00 (EST)
Location: IRON RIVER
Magnitude: 65 E
Reported by: NWS STORM SURVEY

Numerous trees were blown down.

Thunderstorm Wind in MENOMINEE, MICHIGAN
From 01-AUG-02 07:10:00 to 01-AUG-02 07:10:00 (EST)
Location: HERMANSVILLE
Magnitude: 65 E
Reported by: NWS STORM SURVEY

Numerous trees were blown down.

Thunderstorm Wind in ONTONAGON, MICHIGAN
From 01-AUG-02 04:55:00 to 01-AUG-02 04:55:00 (EST)
Location: EWEN
Magnitude: 60 E
Reported by: LAW ENFORCEMENT

Winds to 65 mph blew the roof of a house.

Thunderstorm Wind in ALGER, MICHIGAN
From 01-AUG-02 14:37:00 to 01-AUG-02 14:37:00 (EST)
Location: WETMORE
Magnitude: 60 E
Reported by: GENERAL PUBLIC

A 6 inch diameter tree was snapped off.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 01-AUG-02 05:03:00 to 01-AUG-02 05:03:00 (EST)
Location: HOUGHTON
Magnitude: 80 E
Reported by: EMERGENCY MANAGER

Numerous trees and power lines were blown down, a metal roof was peeled off a warehouse, an empty  semi-trailer was overturned, and a camper trailer was tipped over.

Hail in MARQUETTE, MICHIGAN
From 01-AUG-02 13:00:00 to 01-AUG-02 13:00:00 (EST)
Location: SKANDIA
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

Quarter sized hail was reported.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 01-AUG-02 05:00:00 to 01-AUG-02 05:00:00 (EST)
Location: WAKEFIELD
Magnitude: 61 E
Reported by: TRAINED SPOTTER

Numerous 6 inch diameter hardwood trees were blown down.

Thunderstorm Wind in LUCE, MICHIGAN
From 01-AUG-02 15:25:00 to 01-AUG-02 15:25:00 (EST)
Location: NEWBERRY
Magnitude: 60 E
Reported by: GENERAL PUBLIC

A tree was blown down on M-123.

Thunderstorm Wind in DELTA, MICHIGAN
From 01-AUG-02 14:50:00 to 01-AUG-02 14:50:00 (EST)
Location: ISABELLA
Magnitude: 65 E
Reported by: GENERAL PUBLIC

Nine inch diameter trees were blown down.

Hail in GOGEBIC, MICHIGAN
From 01-AUG-02 04:45:00 to 01-AUG-02 04:45:00 (EST)
Location: MARENISCO
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Three quarter inch hail was reported.

Thunderstorm Wind in IRON, MICHIGAN
From 01-AUG-02 12:56:00 to 01-AUG-02 12:56:00 (EST)
Location: IRON RIVER
Magnitude: 65 E
Reported by: GENERAL PUBLIC

A 1 foot diameter tree was blown down.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 01-AUG-02 12:54:00 to 01-AUG-02 12:54:00 (EST)
Location: WATERSMEET
Magnitude: 65 E
Reported by: GENERAL PUBLIC

Numerous trees were blown down.