Diffluent, unstable southwest flow aloft ahead of an upper low moving across southern Canada, resulted in late afternoon and evening thunderstorms over portions of North Central Montana. Some storms became severe with large hail and damaging winds.

Hail in CHOUTEAU, MONTANA
From 10-JUN-16 15:05:00 to 10-JUN-16 15:05:00 (MST-7)
Location: GERALDINE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm dropped 1 inch diameter hail at Geraldine.

Hail in CHOUTEAU, MONTANA
From 10-JUN-16 15:45:00 to 10-JUN-16 15:45:00 (MST-7)
Location: SQUARE BUTTE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm dropped 2 inch diameter hail at Square Butte 1SW. Also, 1.75 inch diameter hail was reported at Winifred 12W and 2 inch diameter hail at Winifred 10W.

Hail in CASCADE, MONTANA
From 10-JUN-16 15:40:00 to 10-JUN-16 15:40:00 (MST-7)
Location: MONARCH
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm dropped 1 inch diameter hail at Monarch.

Hail in FERGUS, MONTANA
From 10-JUN-16 16:42:00 to 10-JUN-16 16:42:00 (MST-7)
Location: COFFEE CREEK
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm dropped 1.25 inch diameter hail at Coffee Creek 6N. Also, 1.75 inch diameter hail was reported at Stanford 2NNE and a thunderstorm wind gust to 62 mph was reported at Denton 7NE.

Thunderstorm Wind in FERGUS, MONTANA
From 10-JUN-16 17:11:00 to 10-JUN-16 17:11:00 (MST-7)
Location: DENTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds toppled two power poles.

Thunderstorm Wind in FERGUS, MONTANA
From 10-JUN-16 17:56:00 to 10-JUN-16 17:56:00 (MST-7)
Location: ROY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A thunderstorm produced a wind gust to 64 mph at Roy 2E.

Hail in FERGUS, MONTANA
From 10-JUN-16 18:10:00 to 10-JUN-16 18:10:00 (MST-7)
Location: ROY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm dropped 1.75 inch diameter hail at Roy 10NE and 2 inch diameter hail at Roy 15NE.

Thunderstorm Wind in FERGUS, MONTANA
From 10-JUN-16 18:18:00 to 10-JUN-16 18:18:00 (MST-7)
Location: DENTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A thunderstorm wind gust to 60 mph was reported at Denton 5ESE. Also, a thunderstorm gust to 63 mph was reported at Denton 7NE, a gust to 64 mph was reported at Suffolk 3WSW, and a gust to 62 mph was reported at Roy 2E. The Roy area was particularly hard hit by thunderstorms. Numerous power poles in the area were snapped off by the wind, large trees were downed, and sheet metal was reported to be blowing across Highway 191. Hail up to an inch in diameter was also reported at some locations.

Hail in CHOUTEAU, MONTANA
From 10-JUN-16 14:35:00 to 10-JUN-16 14:35:00 (MST-7)
Location: HIGHWOOD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped 1.75 inch diameter hail at Highwood 10SE and 2 inch diameter hail at Highwood 8S. Small tree limbs were reported down.