A very unstable airmass supported the development of widespread thunderstorms over North Central Montana during the afternoon and evening hours of the 16th and continuing into the early morning hours of the 17th. A tornado touched down in the mountains east of the town of Neihart. Damage was limited to numerous downed trees. Hail the sixe of baseballs was reported at several locations.

Hail in LEWIS AND CLARK, MONTANA
From 16-JUN-07 14:55:00 to 16-JUN-07 14:55:00 (MST-7)
Location: HELENA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1.5 inch diameter hail at Helena 6N.

Hail in GLACIER, MONTANA
From 16-JUN-07 14:57:00 to 16-JUN-07 14:57:00 (MST-7)
Location: CUTBANK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1 inch diameter hail at Cut Bank.

Heavy Rain in JUDITH BASIN, MONTANA
From 16-JUN-07 17:10:00 to 16-JUN-07 17:10:00 (MST-7)
Location: STANFORD
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm dropped 1.25 inches of rain at Stanford 7W.

Hail in JUDITH BASIN, MONTANA
From 16-JUN-07 17:50:00 to 16-JUN-07 17:50:00 (MST-7)
Location: UTICA
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped 2.75 inch diameter hail at Checkerboard 10NNE. The hail caused damage to automobiles and recreational vehicles at Whitetail Campground (elevation 6500 feet).

Hail in JUDITH BASIN, MONTANA
From 16-JUN-07 17:55:00 to 16-JUN-07 17:55:00 (MST-7)
Location: UTICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A severe thunderstorm dropped 1 inch diameter hail at Utica 17SW. The hail fell for several miles along the south fork of the Judith River between Corral Creek and Hay Canyon. Hail drifts to a depth of 1 foot were reported.

Hail in JUDITH BASIN, MONTANA
From 16-JUN-07 18:15:00 to 16-JUN-07 18:15:00 (MST-7)
Location: HOBSON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Hobson 3NE.

Hail in JUDITH BASIN, MONTANA
From 16-JUN-07 23:00:00 to 16-JUN-07 23:00:00 (MST-7)
Location: UTICA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped 1 inch diameter hail at Buffalo 12W.

Hail in LEWIS AND CLARK, MONTANA
From 16-JUN-07 14:58:00 to 16-JUN-07 14:58:00 (MST-7)
Location: IRON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Hauser Dam.

Hail in CASCADE, MONTANA
From 16-JUN-07 15:20:00 to 16-JUN-07 15:20:00 (MST-7)
Location: GREAT FALLS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm dropped 1.75 inch diameter hail in downtown Great Falls.

Hail in CASCADE, MONTANA
From 16-JUN-07 15:30:00 to 16-JUN-07 15:30:00 (MST-7)
Location: GREAT FALLS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm dropped 1.5 inch diameter hail on the north and east side of Great Falls.

Funnel Cloud in BLAINE, MONTANA
From 16-JUN-07 13:51:00 to 16-JUN-07 13:55:00 (MST-7)
Location: HARLEM
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A funnel cloud was reported between the towns of Harlem and Zurich. The funnel lasted approximately 3 to 4 minutes and reached halfway to the ground.

Hail in BLAINE, MONTANA
From 16-JUN-07 13:10:00 to 16-JUN-07 13:35:00 (MST-7)
Location: LOHMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe dropped 1 inch diameter hail for 25 minutes at Lohman 13N. The hail damaged numerous trees. In addition to the hail, the storm produced 1.5 inches of rain.

Hail in LEWIS AND CLARK, MONTANA
From 16-JUN-07 15:38:00 to 16-JUN-07 15:38:00 (MST-7)
Location: SILVER CITY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .88 inch diameter hail at Silver City 1E.

Hail in CASCADE, MONTANA
From 16-JUN-07 15:45:00 to 16-JUN-07 15:45:00 (MST-7)
Location: BELT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1.75 inch diameter hail at Belt 9N.

Hail in FERGUS, MONTANA
From 16-JUN-07 23:15:00 to 16-JUN-07 23:15:00 (MST-7)
Location: MOORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1 inch diameter hail at Moore 6S.

Hail in FERGUS, MONTANA
From 16-JUN-07 23:20:00 to 16-JUN-07 23:20:00 (MST-7)
Location: MOORE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped 1.5 inch diameter hail at Moore 8SE.

Hail in FERGUS, MONTANA
From 17-JUN-07 00:15:00 to 17-JUN-07 00:15:00 (MST-7)
Location: GRASSRANGE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Grass Range 3S.

Hail in BLAINE, MONTANA
From 16-JUN-07 14:15:00 to 16-JUN-07 14:15:00 (MST-7)
Location: HARLEM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1 inch diameter hail at Harlem 16NNE. The hail severely damaged the winter wheat crop.

Hail in BLAINE, MONTANA
From 16-JUN-07 14:30:00 to 16-JUN-07 14:30:00 (MST-7)
Location: TURNER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1 inch diameter hail at Turner 12S. The hail covered the ground to a depth of 1 inch and destroyed the winter wheat crop.

Hail in CASCADE, MONTANA
From 16-JUN-07 14:45:00 to 16-JUN-07 14:45:00 (MST-7)
Location: SIMMS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Simms 1SSE.

Thunderstorm Wind in LEWIS AND CLARK, MONTANA
From 16-JUN-07 15:55:00 to 16-JUN-07 15:55:00 (MST-7)
Location: EAST HELENA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced a wind gust to 65 mph at East Helena. The wind damaged numreous trees. A possible funnel cloud was also reported by the public.

Hail in CASCADE, MONTANA
From 16-JUN-07 16:20:00 to 16-JUN-07 16:20:00 (MST-7)
Location: NEIHART
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Neihart.

Hail in JUDITH BASIN, MONTANA
From 16-JUN-07 16:55:00 to 16-JUN-07 16:55:00 (MST-7)
Location: STANFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped .75 inch diameter hail at Stanford 10S.

Thunderstorm Wind in HILL, MONTANA
From 16-JUN-07 11:18:00 to 16-JUN-07 11:18:00 (MST-7)
Location: HINGHAM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced a wind gust to 60 mph at Hingham 12N.

Hail in HILL, MONTANA
From 16-JUN-07 11:40:00 to 16-JUN-07 11:40:00 (MST-7)
Location: GILDFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .75 inch diameter hail at Gilford 5N. The hail damaged the winter wheat crop.

Thunderstorm Wind in HILL, MONTANA
From 16-JUN-07 11:50:00 to 16-JUN-07 11:50:00 (MST-7)
Location: GILDFORD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced a wind gust to 60 mph at Gilford 9N.

Thunderstorm Wind in HILL, MONTANA
From 16-JUN-07 12:20:00 to 16-JUN-07 12:20:00 (MST-7)
Location: HAVRE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced a wind gust to 60 mph at Havre 12N.

Tornado in JUDITH BASIN, MONTANA
From 16-JUN-07 16:31:00 to 16-JUN-07 16:41:00 (MST-7)
Location: HUGHESVILLE
Tornado F-scale: EF1
Property damage: 0.00K
Reported by: NWS Storm Survey

Storm survey indicated tornadic damage path beginning on the eastern slope of Big Baldy Mountain...then continuing eastward for 5 miles. Path width varied from 10 yards to 100 yards. Damage to trees generally blown down or snapped off. Damage greatest on south side of path with trees converging into the path. Main damage swath continued eastward over an adjacent ridge and down the other side. Near end of damage path...tree fall indicated cyclonic swirl pattern. Tornado damage rated as EF1 consistent with winds of 100 mph.

Hail in MEAGHER, MONTANA
From 16-JUN-07 15:40:00 to 16-JUN-07 15:40:00 (MST-7)
Location: WHITE SULPHUR SPGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped .88 inch diameter hail at White Sulphur Springs 35NNW.

Hail in LEWIS AND CLARK, MONTANA
From 16-JUN-07 15:50:00 to 16-JUN-07 15:50:00 (MST-7)
Location: HELENA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm dropped 1 inch diameter hail at Helena.