On April 18, as a low pressure system moved toward Michigan's Upper Peninsula from the northern plains, scattered morning showers gave way to afternoon sunshine.  Temperatures in the warm air ahead of the storm system rose into the 70s. The strong  surface heating and the approach of the warm front ahead of the low initiated severe thunderstorms over west and central Upper Michigan late in the day and into the night.

Hail in BARAGA, MICHIGAN
From 18-APR-02 18:45:00 to 18-APR-02 18:45:00 (EST)
Location: PELKIE
Magnitude: 1.50 
Reported by: DEPT OF HIGHWAYS

1 1/2 inch diameter hail was reported.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 17:30:00 to 18-APR-02 17:30:00 (EST)
Location: AGATE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

1 inch diameter hail was reported.

Hail in BARAGA, MICHIGAN
From 18-APR-02 18:20:00 to 18-APR-02 18:20:00 (EST)
Location: KEWEENAW BAY
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Nickel sized hail was reported.

Hail in HOUGHTON, MICHIGAN
From 18-APR-02 18:45:00 to 18-APR-02 18:45:00 (EST)
Location: TAPIOLA
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

1 inch diameter hail was reported.

Hail in BARAGA, MICHIGAN
From 18-APR-02 18:00:00 to 18-APR-02 18:00:00 (EST)
Location: PELKIE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

1 inch diameter hail  was reported.

Hail in HOUGHTON, MICHIGAN
From 18-APR-02 18:29:00 to 18-APR-02 18:29:00 (EST)
Location: NISULA
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

3/4 inch hail was reported.

Hail in HOUGHTON, MICHIGAN
From 18-APR-02 21:50:00 to 18-APR-02 21:50:00 (EST)
Location: HANCOCK
Magnitude: 1.00 
Reported by: GENERAL PUBLIC

1 inch diameter hail was reported.

Hail in HOUGHTON, MICHIGAN
From 18-APR-02 17:50:00 to 18-APR-02 17:50:00 (EST)
Location: NISULA
Magnitude: 0.88 
Reported by: GENERAL PUBLIC

Nickel sized hail was reported.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 18:40:00 to 18-APR-02 18:40:00 (EST)
Location: ROCKLAND
Magnitude: 1.50 
Reported by: GENERAL PUBLIC

1 1/2 inch diameter hail was reported.

Hail in MARQUETTE, MICHIGAN
From 18-APR-02 19:35:00 to 18-APR-02 19:35:00 (EST)
Location: GWINN
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Nickel sized hail was reported.

Thunderstorm Wind in ALGER, MICHIGAN
From 18-APR-02 19:25:00 to 18-APR-02 19:25:00 (EST)
Location: AU TRAIN
Magnitude: 60 E
Reported by: LAW ENFORCEMENT

6 inch diameter fir tree blown down.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 18:50:00 to 18-APR-02 18:50:00 (EST)
Location: MASS
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golfball sized hail was reported.

Hail in MENOMINEE, MICHIGAN
From 18-APR-02 14:10:00 to 18-APR-02 14:10:00 (CST)
Location: CEDAR RIVER
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

1 inch diameter hail was reported.

Thunderstorm Wind in GOGEBIC, MICHIGAN
From 18-APR-02 15:55:00 to 18-APR-02 15:55:00 (CST)
Location: WATERSMEET
Magnitude: 65 E
Reported by: TRAINED SPOTTER

Trees were blown down along Thousand Island Lake.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 17:20:00 to 18-APR-02 17:20:00 (EST)
Location: BRUCE CROSSING
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

3/4 inch diameter hail was reported.

Hail in HOUGHTON, MICHIGAN
From 18-APR-02 17:30:00 to 18-APR-02 17:30:00 (EST)
Location: KENTON
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Nickel sized hail was reported.

Hail in GOGEBIC, MICHIGAN
From 18-APR-02 17:05:00 to 18-APR-02 17:05:00 (CST)
Location: MARENISCO
Magnitude: 0.75 
Reported by: LAW ENFORCEMENT

3/4 inch hail was reported.

Hail in GOGEBIC, MICHIGAN
From 18-APR-02 16:35:00 to 18-APR-02 16:35:00 (CST)
Location: MARENISCO
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Nickel sized hail was reported.

Hail in GOGEBIC, MICHIGAN
From 18-APR-02 16:40:00 to 18-APR-02 16:40:00 (CST)
Location: MARENISCO
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

3/4 inch hail was reported.

Hail in BARAGA, MICHIGAN
From 18-APR-02 18:00:00 to 18-APR-02 18:00:00 (EST)
Location: PELKIE
Magnitude: 1.00 
Reported by: TRAINED SPOTTER

1 inch hail was reported.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 18:15:00 to 18-APR-02 18:15:00 (EST)
Location: MASS
Magnitude: 1.75 
Reported by: TRAINED SPOTTER

Golfball sized hail was reported.

Hail in ONTONAGON, MICHIGAN
From 18-APR-02 18:55:00 to 18-APR-02 18:55:00 (EST)
Location: MASS
Magnitude: 1.50 
Reported by: TRAINED SPOTTER

1 1/2 inch diameter hail was reported.