A low pressure system from the pacific northwest combined with a warm, moist air mass on the lee side of the northern Rocky Mountains to develop and sustain clusters of severe thunderstorms across much of eastern Montana through the evening and overnight hours.

Thunderstorm Wind in PHILLIPS, MONTANA
From 10-JUN-16 18:41:00 to 10-JUN-16 18:41:00 (MST-7)
Location: MANNING CORRAL RAWS
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Manning Corral Dogtown RAWS site measured a 59 mph wind gust.

Hail in PETROLEUM, MONTANA
From 10-JUN-16 19:00:00 to 10-JUN-16 19:00:00 (MST-7)
Location: CHAIN BUTTES RAWS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported ping pong ball sized hail.

Thunderstorm Wind in PETROLEUM, MONTANA
From 10-JUN-16 19:41:00 to 10-JUN-16 19:41:00 (MST-7)
Location: DRY BLOOD CREEK RAWS
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Dry Blood Creek RAWS site recorded a 72 mph wind gust.

Thunderstorm Wind in GARFIELD, MONTANA
From 10-JUN-16 20:56:00 to 10-JUN-16 20:56:00 (MST-7)
Location: JORDAN
Magnitude: 79.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

ASOS at Jordan measured a 91 mph wind gust.  Telephone and electrical lines were downed.

Thunderstorm Wind in DAWSON, MONTANA
From 10-JUN-16 21:30:00 to 10-JUN-16 21:30:00 (MST-7)
Location: RICHEY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a 65 mph wind gust.

Thunderstorm Wind in MCCONE, MONTANA
From 10-JUN-16 22:20:00 to 10-JUN-16 22:20:00 (MST-7)
Location: CIRCLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported a barn blown down and a camper rolled over.

Thunderstorm Wind in DAWSON, MONTANA
From 10-JUN-16 22:35:00 to 10-JUN-16 22:35:00 (MST-7)
Location: BLOOMFIELD
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured a 62 mph wind gust along with pea sized hail.

Thunderstorm Wind in DAWSON, MONTANA
From 10-JUN-16 23:01:00 to 10-JUN-16 23:01:00 (MST-7)
Location: GLENDIVE DAWSON ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Glendive airport AWOS recorded a 60 mph wind gust.

Hail in VALLEY, MONTANA
From 11-JUN-16 00:35:00 to 11-JUN-16 00:35:00 (MST-7)
Location: GLASGOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Quarter sized hail was observed at the Glasgow, MT NWS office.

Hail in VALLEY, MONTANA
From 11-JUN-16 00:45:00 to 11-JUN-16 00:45:00 (MST-7)
Location: GLASGOW INTL AIRPORT (KGGW)
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail.

Hail in VALLEY, MONTANA
From 11-JUN-16 01:15:00 to 11-JUN-16 01:15:00 (MST-7)
Location: LUSTRE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported trees shredded from quarter sized hail.

Hail in PETROLEUM, MONTANA
From 10-JUN-16 19:45:00 to 10-JUN-16 19:45:00 (MST-7)
Location: DRY BLOOD CREEK RAWS
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Strom chaser reported tennis ball sized hail just inside the edge of Petroleum County.

Thunderstorm Wind in PETROLEUM, MONTANA
From 10-JUN-16 19:45:00 to 10-JUN-16 19:45:00 (MST-7)
Location: DRY BLOOD CREEK RAWS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Strom chaser reported 70 mph wind gusts just inside the edge of Petroleum County.

Thunderstorm Wind in GARFIELD, MONTANA
From 10-JUN-16 21:04:00 to 10-JUN-16 21:04:00 (MST-7)
Location: JORDAN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chasers reported sustained winds of 50 mph with gusts up to 60 mph.

Thunderstorm Wind in GARFIELD, MONTANA
From 10-JUN-16 21:15:00 to 10-JUN-16 21:15:00 (MST-7)
Location: JORDAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported wind gusts up to 60 mph.

Thunderstorm Wind in GARFIELD, MONTANA
From 10-JUN-16 21:26:00 to 10-JUN-16 21:26:00 (MST-7)
Location: JORDAN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chasers reported power poles snapped off and power lines and transformer blocking traffic on MT-Highway 200.

Thunderstorm Wind in GARFIELD, MONTANA
From 10-JUN-16 21:26:00 to 10-JUN-16 21:26:00 (MST-7)
Location: JORDAN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chasers estimate 70 mph wind gusts.

Hail in VALLEY, MONTANA
From 11-JUN-16 00:33:00 to 11-JUN-16 00:33:00 (MST-7)
Location: GLASGOW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee reported quarter sized hail.