A strong low pressure system from the pacific northwest and an unstable atmosphere combined to develop severe thunderstorms across the northern high plains region.

Hail in VALLEY, MONTANA
From 08-JUN-12 21:43:00 to 08-JUN-12 21:50:00 (MST-7)
Location: NASHUA
Magnitude: 1.00 
Reported by: Public

Dime to quarter sized hail was reported by the public and lasted 7 minutes about 2 miles northwest of Nashua in Valley County.

Hail in GARFIELD, MONTANA
From 08-JUN-12 21:45:00 to 08-JUN-12 21:45:00 (MST-7)
Location: BRUSETT
Magnitude: 1.00 
Reported by: COOP Observer

A CO-OP observer reported quarter sized hail about 8 miles north of Brusett in northern Garfield County.

Hail in GARFIELD, MONTANA
From 08-JUN-12 22:20:00 to 08-JUN-12 22:30:00 (MST-7)
Location: HAXBY POINT
Magnitude: 0.88 
Reported by: Trained Spotter

A trained spotter reported nickel sized hail that lasted for 10 minutes 15 miles southwest of Haxby Point in Garfield County.

Hail in PHILLIPS, MONTANA
From 08-JUN-12 17:40:00 to 08-JUN-12 17:40:00 (MST-7)
Location: WHITEWATER
Magnitude: 0.88 
Reported by: Trained Spotter

A trained spotter reported nickel sized hail about 13 miles northeast of Whitewater in northeastern Phillips County.

Hail in GARFIELD, MONTANA
From 08-JUN-12 21:45:00 to 08-JUN-12 21:45:00 (MST-7)
Location: SOUTH SAWMILL RAWS
Magnitude: 0.75 
Reported by: Trained Spotter

A trained spotter reported penny sized hail about 12 miles east of the South Sawmill RAWS Station in northern Garfield County.

Hail in GARFIELD, MONTANA
From 08-JUN-12 22:45:00 to 08-JUN-12 22:45:00 (MST-7)
Location: COHAGEN
Magnitude: 1.25 
Reported by: Trained Spotter

A trained spotter reported mainly dime sized hail but some of the hail was half dollar sized 3 miles east-northeast of Cohagen in Garfield County.

Hail in VALLEY, MONTANA
From 08-JUN-12 20:17:00 to 08-JUN-12 20:17:00 (MST-7)
Location: KING COULEE RAWS
Magnitude: 1.75 
Reported by: Public

Golf ball sized hail fell and dented a pickup truck in southern Valley County.

Hail in VALLEY, MONTANA
From 08-JUN-12 20:52:00 to 08-JUN-12 20:52:00 (MST-7)
Location: DUCK CREEK
Magnitude: 1.00 
Reported by: Trained Spotter

A trained spotter reported quarter sized hail accumulating in piles in addition to broken limbs off of trees and heavy rain.

Hail in VALLEY, MONTANA
From 08-JUN-12 19:50:00 to 08-JUN-12 19:50:00 (MST-7)
Location: KING COULEE RAWS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Co-op observer reported quarter-sized hail stones at the onset of the storm.

Hail in GARFIELD, MONTANA
From 08-JUN-12 21:50:00 to 08-JUN-12 21:50:00 (MST-7)
Location: BRUSETT
Magnitude: 1.00 
Reported by: Trained Spotter

A trained spotter reported quarter sized hail 13 miles north-northeast of Brusett in northern Garfield County.

Thunderstorm Wind in GARFIELD, MONTANA
From 08-JUN-12 22:05:00 to 08-JUN-12 22:05:00 (MST-7)
Location: COHAGEN
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported a wind gust of 60 MPH about 6 miles west-northwest of Cohagen in Garfield County.

Hail in GARFIELD, MONTANA
From 08-JUN-12 22:05:00 to 08-JUN-12 22:05:00 (MST-7)
Location: COHAGEN
Magnitude: 0.75 
Reported by: Trained Spotter

A trained spotter reported penny size hail about 6 miles west-northwest of Cohagen in Garfield County.

Thunderstorm Wind in GARFIELD, MONTANA
From 08-JUN-12 22:30:00 to 08-JUN-12 22:30:00 (MST-7)
Location: HAXBY POINT
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported a 60 MPH wind gust 15 miles southwest of Haxby Point in Garfield County.

Thunderstorm Wind in PHILLIPS, MONTANA
From 08-JUN-12 17:30:00 to 08-JUN-12 17:30:00 (MST-7)
Location: WHITEWATER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained weather spotter reported wind gusts of 60 mph, experienced with driving a vehicle about 8 miles north of Whitewater in northern Phillips County.

Thunderstorm Wind in VALLEY, MONTANA
From 08-JUN-12 17:35:00 to 08-JUN-12 17:35:00 (MST-7)
Location: BLUFF CREEK RAWS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Wind gusts up 60 mph were recorded at the Bluff Creek RAWS site in northwestern Valley County.

Thunderstorm Wind in VALLEY, MONTANA
From 08-JUN-12 20:56:00 to 08-JUN-12 20:56:00 (MST-7)
Location: FT PECK
Magnitude: 63.00 MG
Reported by: Law Enforcement

Wind speed was measured on an automated weather station at the Valley County Sheriff's property.

Thunderstorm Wind in GARFIELD, MONTANA
From 08-JUN-12 23:05:00 to 08-JUN-12 23:05:00 (MST-7)
Location: VAN NORMAN
Magnitude: 52.00 EG
Reported by: Trained Spotter

A trained spotter reported a 60 MPH wind gust 10 miles south of Van Norman in Garfield County.

Thunderstorm Wind in MCCONE, MONTANA
From 08-JUN-12 23:30:00 to 08-JUN-12 23:30:00 (MST-7)
Location: BROCKWAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 60 MPH wind gust, and also pea to dime sized hail 8 miles west of Brockway in McCone County.

Hail in ROOSEVELT, MONTANA
From 09-JUN-12 01:00:00 to 09-JUN-12 01:00:00 (MST-7)
Location: BROCKTON
Magnitude: 1.00 
Reported by: Trained Spotter

A trained spotter reported quarter sized hail 16 miles north of Brockton in McCone County.

Thunderstorm Wind in MCCONE, MONTANA
From 09-JUN-12 00:15:00 to 09-JUN-12 00:15:00 (MST-7)
Location: COW CREEK DOT
Magnitude: 56.00 EG
Reported by: Trained Spotter

A trained spotter reported a 65 MPH wind gust along with dime sized hail near Brockway in McCone County.

Hail in PHILLIPS, MONTANA
From 08-JUN-12 17:40:00 to 08-JUN-12 17:40:00 (MST-7)
Location: WHITEWATER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported nickel-sized hail stones about 14 miles northeast of Whitewater in northeastern Phillips County.