Moist surface conditions, an unstable atmosphere, and a low pressure trough combined to form and sustain multiple organized severe thunderstorms across portions of northeast Montana.

Thunderstorm Wind in DAWSON, MONTANA
From 19-JUN-15 15:15:00 to 19-JUN-15 15:15:00 (MST-7)
Location: GLENDIVE
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The Glendive airport AWOS site measured 66 mph wind gusts.

Thunderstorm Wind in RICHLAND, MONTANA
From 19-JUN-15 15:17:00 to 19-JUN-15 15:17:00 (MST-7)
Location: SIOUX PASS DOT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated 70 mph wind gusts.

Thunderstorm Wind in RICHLAND, MONTANA
From 19-JUN-15 15:20:00 to 19-JUN-15 15:20:00 (MST-7)
Location: SIOUX PASS DOT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated 70 mph wind gusts.

Hail in RICHLAND, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: SIDNEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The Ranger Review Newspaper in Sidney reported quarter-sized hail.

Hail in RICHLAND, MONTANA
From 19-JUN-15 15:17:00 to 19-JUN-15 15:17:00 (MST-7)
Location: SIOUX PASS DOT
Magnitude: 1.50 
Property damage: 23.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported ping pong ball-sized hail with crop damage, roof damage, and broken windows, along with heavy rain.

Hail in PRAIRIE, MONTANA
From 19-JUN-15 14:50:00 to 19-JUN-15 14:50:00 (MST-7)
Location: SUTHERLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny to nickel-sized hail.

Thunderstorm Wind in RICHLAND, MONTANA
From 19-JUN-15 15:18:00 to 19-JUN-15 15:18:00 (MST-7)
Location: FAIRVIEW
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Four large trees brought down by thunderstorm winds.  Tree type unknown.

Thunderstorm Wind in RICHLAND, MONTANA
From 19-JUN-15 15:19:00 to 19-JUN-15 15:19:00 (MST-7)
Location: FAIRVIEW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Trees down in Fairview as reported through social media.  Tree type unknown.

Hail in VALLEY, MONTANA
From 19-JUN-15 12:45:00 to 19-JUN-15 12:45:00 (MST-7)
Location: LARSLAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail up to the size of quarters covering the ground.

Hail in VALLEY, MONTANA
From 19-JUN-15 12:45:00 to 19-JUN-15 12:45:00 (MST-7)
Location: LARSLAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported quarter-sized hail.

Hail in ROOSEVELT, MONTANA
From 19-JUN-15 13:25:00 to 19-JUN-15 13:25:00 (MST-7)
Location: VOLT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported ping pong ball-sized hail.

Hail in VALLEY, MONTANA
From 19-JUN-15 13:39:00 to 19-JUN-15 13:50:00 (MST-7)
Location: LARSLAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail up to the sized of golf balls lasting for about 10 minutes.

Hail in ROOSEVELT, MONTANA
From 19-JUN-15 13:40:00 to 19-JUN-15 13:40:00 (MST-7)
Location: MCDONALDS DOT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported ping pong ball-sized hail.

Thunderstorm Wind in GARFIELD, MONTANA
From 19-JUN-15 14:05:00 to 19-JUN-15 14:05:00 (MST-7)
Location: VAN NORMAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated 60 mph wind gusts.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 19-JUN-15 14:11:00 to 19-JUN-15 14:11:00 (MST-7)
Location: POPLAR ARPT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Poplar airport AWOS site measured 61 mph wind gusts.

Hail in MCCONE, MONTANA
From 19-JUN-15 14:25:00 to 19-JUN-15 14:25:00 (MST-7)
Location: VIDA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter-sized hail.

Thunderstorm Wind in PRAIRIE, MONTANA
From 19-JUN-15 14:50:00 to 19-JUN-15 14:50:00 (MST-7)
Location: SUTHERLAND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained Spotter estimated 60 mph wind gusts.

Hail in VALLEY, MONTANA
From 19-JUN-15 12:12:00 to 19-JUN-15 12:12:00 (MST-7)
Location: BAYLOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny-sized hail with heavy rain.

Hail in VALLEY, MONTANA
From 19-JUN-15 12:23:00 to 19-JUN-15 12:23:00 (MST-7)
Location: BAYLOR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny-sized hail with heavy rain.

Hail in VALLEY, MONTANA
From 19-JUN-15 13:30:00 to 19-JUN-15 13:30:00 (MST-7)
Location: BAYLOR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel-sized hail.

Hail in VALLEY, MONTANA
From 19-JUN-15 13:40:00 to 19-JUN-15 13:40:00 (MST-7)
Location: LARSLAN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny-sized hail with very heavy rain.

Hail in ROOSEVELT, MONTANA
From 19-JUN-15 15:15:00 to 19-JUN-15 15:15:00 (MST-7)
Location: BREDETTE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny-sized hail.

Hail in RICHLAND, MONTANA
From 19-JUN-15 15:25:00 to 19-JUN-15 15:25:00 (MST-7)
Location: FAIRVIEW
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported half dollar sized hail.

Hail in RICHLAND, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: FAIRVIEW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported golf ball sized hail.

Hail in ROOSEVELT, MONTANA
From 19-JUN-15 15:30:00 to 19-JUN-15 15:30:00 (MST-7)
Location: BROCKTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported penny-sized hail.

Hail in PRAIRIE, MONTANA
From 19-JUN-15 15:50:00 to 19-JUN-15 15:50:00 (MST-7)
Location: SUTHERLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel-sized hail.

Hail in PRAIRIE, MONTANA
From 19-JUN-15 15:52:00 to 19-JUN-15 15:52:00 (MST-7)
Location: BLATCHFORD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported penny-sized hail.

Hail in PHILLIPS, MONTANA
From 19-JUN-15 16:01:00 to 19-JUN-15 16:01:00 (MST-7)
Location: LORING
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball sized hail.

Thunderstorm Wind in RICHLAND, MONTANA
From 19-JUN-15 15:18:00 to 19-JUN-15 15:18:00 (MST-7)
Location: FAIRVIEW
Magnitude: 83.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large, four-year old roping barn was destroyed by a microburst. The winds peeled the metal roof back, the tresses collapsed, and the east wall was blown eastward.  Based on photographs from the Emergency Manager, and archived radar data, the maximum wind gusts from the microburst were estimated at 95 mph.

Hail in RICHLAND, MONTANA
From 19-JUN-15 15:19:00 to 19-JUN-15 15:19:00 (MST-7)
Location: FAIRVIEW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter-sized hail.