A low pressure system moving through the northern high plains region allowed a moist and unstable atmosphere to develop isolated severe thunderstorms.

Thunderstorm Wind in VALLEY, MONTANA
From 01-JUL-12 21:55:00 to 01-JUL-12 21:55:00 (MST-7)
Location: KING COULEE RAWS
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts measured up to 59 mph at the Kind Coulee RAWS site.  Time is estimated from radar imagery.

Thunderstorm Wind in VALLEY, MONTANA
From 01-JUL-12 22:20:00 to 01-JUL-12 22:20:00 (MST-7)
Location: GLASGOW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS employee estimated 65 mph wind gusts with a line of thunderstorms.

Thunderstorm Wind in PETROLEUM, MONTANA
From 01-JUL-12 21:22:00 to 01-JUL-12 21:22:00 (MST-7)
Location: CHAIN BUTTES RAWS
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Wind gusts up to 59 mph were measured by the Chain Buttes RAWS station located 8 miles west of the UL bend.

Thunderstorm Wind in VALLEY, MONTANA
From 01-JUL-12 22:26:00 to 01-JUL-12 22:26:00 (MST-7)
Location: GLASGOW
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts up to 60 mph measured at the Glasgow Airport NWS ASOS site.

Thunderstorm Wind in SHERIDAN, MONTANA
From 02-JUL-12 00:30:00 to 02-JUL-12 00:30:00 (MST-7)
Location: REDSTONE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported sustained winds of 50 mph with a few wind gusts up to 60 mph causing a 5-minute power outage in the town of Redstone.

Thunderstorm Wind in GARFIELD, MONTANA
From 01-JUL-12 21:30:00 to 01-JUL-12 21:30:00 (MST-7)
Location: SOUTH SAWMILL RAWS
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Wind gusts up to 69 mph at the South Sawmill Creek RAWS station.  Time estimated by radar imagery.

Hail in VALLEY, MONTANA
From 01-JUL-12 22:15:00 to 01-JUL-12 22:15:00 (MST-7)
Location: DUCK CREEK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported quarter-sized hail stones.

Hail in GARFIELD, MONTANA
From 01-JUL-12 22:44:00 to 01-JUL-12 22:44:00 (MST-7)
Location: HAXBY POINT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Penny-sized hail stones reported by a visiting DES co-ordinator.

Thunderstorm Wind in VALLEY, MONTANA
From 01-JUL-12 22:58:00 to 01-JUL-12 22:58:00 (MST-7)
Location: FRAZER
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts up to 61 mph were measured at the Frazer School mesonet site.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 01-JUL-12 23:38:00 to 01-JUL-12 23:38:00 (MST-7)
Location: WOLF PT
Magnitude: 51.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts up to 59 mph measured at the Wolf Point Airport ASOS site.  Power pole near Wolf Point was snapped and line was sparking.  Volunteer fire department responded.

Thunderstorm Wind in VALLEY, MONTANA
From 01-JUL-12 22:22:00 to 01-JUL-12 22:22:00 (MST-7)
Location: GLASGOW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS Employee reported thunderstorm wind damage.  Two sections of a wooden fence were blown over by estimated 65 mph wind gusts.

Hail in MCCONE, MONTANA
From 01-JUL-12 22:44:00 to 01-JUL-12 22:44:00 (MST-7)
Location: FT PECK LAKE HANDAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County DES co-ordinator reported penny-sized hail and a half inch of rain accumulation.