Strong shortwave trough with deepening surface low pressure area aided in the development of significant severe weather for portions of northern and central Montana. This episode included a downburst that produced a 115 mph wind gust near Sunburst, MT.

Hail in TOOLE, MONTANA
From 08-JUN-17 18:15:00 to 08-JUN-17 18:15:00 (MST-7)
Location: ETHRIDGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of quarter sized hail south of Ethridge near Potter Road.

Hail in PONDERA, MONTANA
From 08-JUN-17 18:14:00 to 08-JUN-17 18:14:00 (MST-7)
Location: VALIER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported quarter sized hail.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 19:08:00 to 08-JUN-17 19:08:00 (MST-7)
Location: SHELBY ARPT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 2 semis and 1 camper blown over along I-15 north of Shelby.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:52:00 to 08-JUN-17 18:52:00 (MST-7)
Location: SUNBURST
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Sunburst DOT sensor recorded a gust of 83 mph.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:40:00 to 08-JUN-17 18:40:00 (MST-7)
Location: SHELBY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported a severe wind gust that caused sheet metal to wrap around pole.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:49:00 to 08-JUN-17 18:49:00 (MST-7)
Location: SHELBY ARPT
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported a double semi-trailer blown over at Mile Marker 358 along Interstate 15.

Hail in JUDITH BASIN, MONTANA
From 08-JUN-17 20:05:00 to 08-JUN-17 20:05:00 (MST-7)
Location: HOBSON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained Spotter reported nickel to quarter sized hail.

Thunderstorm Wind in PONDERA, MONTANA
From 08-JUN-17 18:19:00 to 08-JUN-17 18:19:00 (MST-7)
Location: MANSON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reports tree blown down by thunderstorm outflow. Winds estimated around 60 mph.

Thunderstorm Wind in TETON, MONTANA
From 08-JUN-17 18:15:00 to 08-JUN-17 18:15:00 (MST-7)
Location: AGAWAM
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station reported wind gust of 80 mph.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 19:00:00 to 08-JUN-17 19:00:00 (MST-7)
Location: HELLINGER
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station reported 75 mph wind gust.

Thunderstorm Wind in PONDERA, MONTANA
From 08-JUN-17 18:56:00 to 08-JUN-17 18:56:00 (MST-7)
Location: CONRAD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of a temporary greenhouse tent destroyed at a grocery store.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 19:06:00 to 08-JUN-17 19:06:00 (MST-7)
Location: KIPPEN
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station reported severe wind gust of 58 mph.

Thunderstorm Wind in LIBERTY, MONTANA
From 08-JUN-17 19:39:00 to 08-JUN-17 19:39:00 (MST-7)
Location: ALMA
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station reported a measured wind gust of 65 mph.

Thunderstorm Wind in TETON, MONTANA
From 08-JUN-17 17:26:00 to 08-JUN-17 17:26:00 (MST-7)
Location: EASTHAM JCT
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Report of 75 mph thunderstorm wind gust.

Thunderstorm Wind in TETON, MONTANA
From 08-JUN-17 17:53:00 to 08-JUN-17 17:53:00 (MST-7)
Location: CHOTEAU
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station reported a wind gust 63 mph.

Thunderstorm Wind in TETON, MONTANA
From 08-JUN-17 18:01:00 to 08-JUN-17 18:01:00 (MST-7)
Location: PENDROY
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Pendroy Montana DOT station reported a thunderstorm wind gust of 76 mph.

Thunderstorm Wind in PONDERA, MONTANA
From 08-JUN-17 18:25:00 to 08-JUN-17 18:25:00 (MST-7)
Location: WILLIAMS
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet site reported a measured wind gust of 60 mph.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:49:00 to 08-JUN-17 18:49:00 (MST-7)
Location: HELLINGER
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet site reported a measured thunderstorm wind gust of 58 mph.

Thunderstorm Wind in TETON, MONTANA
From 08-JUN-17 18:05:00 to 08-JUN-17 18:05:00 (MST-7)
Location: AGAWAM
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Rice Ridge mesonet reported a 71 mph thunderstorm wind gust.

Thunderstorm Wind in PONDERA, MONTANA
From 08-JUN-17 18:15:00 to 08-JUN-17 18:15:00 (MST-7)
Location: CONRAD ARPT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Conrad Airport AWOS site reported a thunderstorm wind gust of 70 mph.

Hail in LEWIS AND CLARK, MONTANA
From 08-JUN-17 16:38:00 to 08-JUN-17 16:38:00 (MST-7)
Location: LINCOLN ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Quarter sized hail reported by the public along with estimated wind gusts of 40 to 50 mph.

Thunderstorm Wind in BROADWATER, MONTANA
From 08-JUN-17 19:42:00 to 08-JUN-17 19:42:00 (MST-7)
Location: TOWNSEND
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet reported thunderstorm wind gust of 59 mph.

Thunderstorm Wind in HILL, MONTANA
From 08-JUN-17 21:20:00 to 08-JUN-17 21:20:00 (MST-7)
Location: FRESNO
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured 58 mph thunderstorm wind gust.

Thunderstorm Wind in HILL, MONTANA
From 08-JUN-17 21:41:00 to 08-JUN-17 21:41:00 (MST-7)
Location: HAVRE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported damage to building in city of Havre. Damage caused by severe thunderstorm winds.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:51:00 to 08-JUN-17 18:51:00 (MST-7)
Location: OILMONT
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported severe wind gust of 62 mph via social media.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 18:59:00 to 08-JUN-17 18:59:00 (MST-7)
Location: SUNBURST
Magnitude: 100.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A 115 mph thunderstorm wind gust was recorded by personal weather station. Likely associated with downburst. Damage to trees, picnic area, roof, and siding.

Thunderstorm Wind in TOOLE, MONTANA
From 08-JUN-17 19:10:00 to 08-JUN-17 19:10:00 (MST-7)
Location: KEVIN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported downed tree branches and a power outage.