A cold frontal passage triggered severe thunderstorms over portions of the west half of Upper Michigan on the afternoon of the 17th.  The severe storms either uprooted or snapped off numerous large trees or dropped large hail at selected locations in Gogebic, Baraga, Houghton, Keweenaw and Marquette counties.  In Gobebic County,  a 50-year old man was struck and killed by lightning while standing under a tree near Sunday Lake in Wakefield.

Thunderstorm Wind in MARQUETTE, MICHIGAN
From 17-JUN-06 14:15:00 to 17-JUN-06 14:15:00 (EST)
Location: MARQUETTE
Magnitude: 55 EG
Property damage: 10K
Reported by: NWS STORM SURVEY

Many trees blown down or uprooted along Eagles Nest and Buck Roe Roads.  Several trees ranging between 8 and 10 inches in diameter were snapped off half way up the tree.  One tree was uprooted near County Highway 550.

Hail in GOGEBIC, MICHIGAN
From 17-JUN-06 12:30:00 to 17-JUN-06 12:30:00 (CST)
Location: MARENISCO
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Penny-sized and smaller hail fell for ten seconds.

Hail in BARAGA, MICHIGAN
From 17-JUN-06 13:38:00 to 17-JUN-06 13:38:00 (EST)
Location: SKANEE
Magnitude: 2.00 
Reported by: GENERAL PUBLIC

Two-inch diameter hail fell at cabin on Huron Bay.

Hail in BARAGA, MICHIGAN
From 17-JUN-06 13:33:00 to 17-JUN-06 13:33:00 (EST)
Location: PEQUAMING
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in BARAGA, MICHIGAN
From 17-JUN-06 13:33:00 to 17-JUN-06 13:33:00 (EST)
Location: L ANSE
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

A 50-foot tall 10-inch diameter tree broke in half.  Also a 7-inch diameter poplar tree broke.

Thunderstorm Wind in BARAGA, MICHIGAN
From 17-JUN-06 14:05:00 to 17-JUN-06 14:05:00 (EST)
Location: ARNHEIM
Magnitude: 50 EG
Property damage: 1K
Reported by: TRAINED SPOTTER

A 10-inch pine tree snapped off.

Thunderstorm Wind in BARAGA, MICHIGAN
From 17-JUN-06 13:38:00 to 17-JUN-06 13:38:00 (EST)
Location: SKANEE
Magnitude: 55 EG
Property damage: 2K
Reported by: GENERAL PUBLIC

Several large trees downed at cabin on Huron Bay.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 17-JUN-06 13:05:00 to 17-JUN-06 13:10:00 (EST)
Location: ALSTON
Magnitude: 50 EG
Property damage: 5K
Reported by: NWS STORM SURVEY

Numerous trees and power lines were reported down along a two-mile swath near Prickett Dam Road and along Silver Mountain Road.

Thunderstorm Wind in BARAGA, MICHIGAN
From 17-JUN-06 13:10:00 to 17-JUN-06 13:15:00 (EST)
Location: PELKIE
Magnitude: 60 EG
Property damage: 40K
Reported by: NWS STORM SURVEY

40 to 50 large trees were snapped off or uprooted between Pine Creek Road and just south of Highway M-38 near the Sturgeon River.

Lightning in GOGEBIC, MICHIGAN
From 17-JUN-06 12:20:00 to 17-JUN-06 12:20:00 (CST)
Location: WAKEFIELD
Reported by: LAW ENFORCEMENT

A 50-year old man was struck and killed by lightning while standing under a tree near Sunday Lake in Wakefield.

Thunderstorm Wind in HOUGHTON, MICHIGAN
From 17-JUN-06 15:50:00 to 17-JUN-06 15:50:00 (EST)
Location: FREDA
Magnitude: 54 MG
Reported by: TRAINED SPOTTER

Measured wind gust of 62 mph.  Also a 6-inch diameter birch tree was snapped off.

Thunderstorm Wind in KEWEENAW, MICHIGAN
From 17-JUN-06 16:30:00 to 17-JUN-06 16:30:00 (EST)
Location: PHOENIX
Magnitude: 60 EG
Property damage: 40K
Reported by: NWS STORM SURVEY

40 to 50 large trees were snapped off or uprooted along Gratiot Lake Road within a mile of the northwest shoreline of Gratiot Lake.