Unstable southwest flow aloft set the stage for thunderstorm development. Some of these storms turned severe, occurring mainly in Phillips and Valley counties.

Tornado in VALLEY, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:09:00 (MST-7)
Location: GLASGOW
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Tornado briefly touched down in open country.  Very brief dust cloud at the surface was observed with no damage.  The funnel cloud and very weak landspout were observed by numerous NWS Glasgow employees.  No wall cloud was present at the time of the event, but one did form after the funnel dissipated.

Hail in VALLEY, MONTANA
From 29-JUN-11 18:40:00 to 29-JUN-11 18:40:00 (MST-7)
Location: GLASGOW
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in VALLEY, MONTANA
From 29-JUN-11 18:42:00 to 29-JUN-11 18:42:00 (MST-7)
Location: GLASGOW
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in VALLEY, MONTANA
From 29-JUN-11 18:45:00 to 29-JUN-11 18:45:00 (MST-7)
Location: GLASGOW
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in VALLEY, MONTANA
From 29-JUN-11 19:05:00 to 29-JUN-11 19:05:00 (MST-7)
Location: VANDALIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in VALLEY, MONTANA
From 29-JUN-11 19:05:00 to 29-JUN-11 19:05:00 (MST-7)
Location: VANDALIA
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rain of .70 inches also fell during the storm, that lasted 45 minutes.

Hail in VALLEY, MONTANA
From 29-JUN-11 19:28:00 to 29-JUN-11 19:28:00 (MST-7)
Location: NASHUA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated golfball size hail.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 19:30:00 to 29-JUN-11 19:30:00 (MST-7)
Location: LARSLAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gust is estimated. Small trees and large limbs were downed.

Hail in SHERIDAN, MONTANA
From 29-JUN-11 20:50:00 to 29-JUN-11 20:50:00 (MST-7)
Location: REDSTONE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain also accompanied the storm.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 19:44:00 to 29-JUN-11 19:44:00 (MST-7)
Location: KING COULEE RAWS
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured at the the King Coulee RAWS station.

Thunderstorm Wind in DANIELS, MONTANA
From 29-JUN-11 20:36:00 to 29-JUN-11 20:36:00 (MST-7)
Location: NAVAJO
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy rain also fell with the storm. No hail was reported.

Hail in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:29:00 (MST-7)
Location: SACO
Magnitude: 1.00 
Property damage: 0.00K
Reported by: Post Office

A farm/ranch was significantly damaged by a tornado and damaging downburst winds.  The storm stripped trees bare, four car garages were either destroyed or damaged.  A 1000 gallon fuel tank that was filled that day was blown off it's stand.  The houses received significant damage from hail and the high winds,and the majority of the windows on the two homes were busted out by the wind and hail.  A 2x6 piece of lumber was blown and implanted into the side of one of the houses.  The majority of the damage was downstream with the storm system.  The peak gust was recorded at 86 mph before the sensor was destroyed.  Quarter size hail fell with the storm as well, wiping out nearby field.  The NWS did not receive the tornado report until a month after the event, but radar data verified the possibility of a tornado, and the property owner verified seeing a funnel cloud come from the sky prior to seeking shelter.

Hail in SHERIDAN, MONTANA
From 29-JUN-11 21:07:00 to 29-JUN-11 21:07:00 (MST-7)
Location: PLENTYWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Strong winds accompanied the hail.

Thunderstorm Wind in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:09:00 (MST-7)
Location: SACO
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Combined with quarter inch hail and heavy rain, visibility was less than 50 feet.

Hail in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:09:00 (MST-7)
Location: SACO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Estimated quarter sized hail. Combined with 70 mph winds and heavy rain, visibility was less than 50 feet.

Thunderstorm Wind in PHILLIPS, MONTANA
From 29-JUN-11 17:25:00 to 29-JUN-11 17:25:00 (MST-7)
Location: MALTA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PHILLIPS, MONTANA
From 29-JUN-11 17:25:00 to 29-JUN-11 17:25:00 (MST-7)
Location: WAGNER
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Estimated baseball size hail that was knocking horses over.

Hail in PHILLIPS, MONTANA
From 29-JUN-11 17:52:00 to 29-JUN-11 17:52:00 (MST-7)
Location: CONTENT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Estimated golfball size hail.

Hail in VALLEY, MONTANA
From 29-JUN-11 18:48:00 to 29-JUN-11 18:48:00 (MST-7)
Location: GLASGOW INTL AIRPORT (KGGW)
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail was measured by an NWS employee.

Thunderstorm Wind in SHERIDAN, MONTANA
From 29-JUN-11 21:07:00 to 29-JUN-11 21:07:00 (MST-7)
Location: PLENTYWOOD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Estimated winds downed a power line and a tree branch that broke a rear window of a vehicle.

Hail in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:09:00 (MST-7)
Location: SACO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 18:14:00 to 29-JUN-11 18:14:00 (MST-7)
Location: HINSDALE
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wind gust was estimated.

Hail in VALLEY, MONTANA
From 29-JUN-11 18:40:00 to 29-JUN-11 18:40:00 (MST-7)
Location: GLASGOW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golfball size hail fell with 50 to 60 mph winds, which knocked small tree limbs down.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 18:40:00 to 29-JUN-11 18:40:00 (MST-7)
Location: GLASGOW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Winds of 50 to 60 mph were estimated and accompanied by golf ball size hail, knocking small tree limbs down.

Hail in VALLEY, MONTANA
From 29-JUN-11 18:40:00 to 29-JUN-11 18:40:00 (MST-7)
Location: GLASGOW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golfball size hail fell with 65 mph winds.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 18:25:00 to 29-JUN-11 18:25:00 (MST-7)
Location: HINSDALE
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Some minor damage to grain bins/farm equipment.

Hail in VALLEY, MONTANA
From 29-JUN-11 18:40:00 to 29-JUN-11 18:53:00 (MST-7)
Location: GLASGOW
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Measured 2-inch diameter hail with an estimated wind of 65 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 18:53:00 to 29-JUN-11 18:53:00 (MST-7)
Location: GLASGOW
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Wind gust was estimated. Two-inch diameter hail also fell with the wind.

Thunderstorm Wind in VALLEY, MONTANA
From 29-JUN-11 19:20:00 to 29-JUN-11 19:20:00 (MST-7)
Location: LARSLAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Three fencing panels were blown down. Numerous small limbs and a small tree were blown down. Shingles were blown off of roof.

Tornado in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:16:00 (MST-7)
Location: SACO
Tornado F-scale: EF1
Property damage: 300.00K
Reported by: Public

A farm/ranch was significantly damaged by a tornado and damaging downburst winds.  The storm stripped trees bare, four car garages were either destroyed or damaged.  A 1000 gallon fuel tank that was filled that day was blown off it's stand.  The houses received significant damage from hail and the high winds,and the majority of the windows on the two homes were busted out by the wind and hail.  A 2x6 piece of lumber was blown and implanted into the side of one of the houses.  The majority of the damage was downstream with the storm system.  The peak gust was recorded at 86 mph before the sensor was destroyed.  Quarter size hail fell with the storm as well, wiping out nearby field.  The NWS did not receive the tornado report until a month after the event, but radar data verified the possibility of a tornado, and the property owner verified seeing a funnel cloud come from the sky prior to seeking shelter.

Thunderstorm Wind in PHILLIPS, MONTANA
From 29-JUN-11 18:09:00 to 29-JUN-11 18:49:00 (MST-7)
Location: SACO
Magnitude: 75.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A farm/ranch was significantly damaged by a tornado and damaging downburst winds.  The storm stripped trees bare, four car garages were either destroyed or damaged.  A 1000 gallon fuel tank that was filled that day was blown off it's stand.  The houses received significant damage from hail and the high winds,and the majority of the windows on the two homes were busted out by the wind and hail.  A 2x6 piece of lumber was blown and implanted into the side of one of the houses.  The majority of the damage was downstream with the storm system.  The peak gust was recorded at 86 mph before the sensor was destroyed.  Quarter size hail fell with the storm as well, wiping out nearby field.  The NWS did not receive the tornado report until a month after the event, but radar data verified the possibility of a tornado, and the property owner verified seeing a funnel cloud come from the sky prior to seeking shelter.