Favorable winds, plentiful surface moisture, and a very unstable atmosphere all supported the development of many severe thunderstorms, and sustained them through most the evening across much of northeast Montana.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:20:00 to 27-JUN-19 18:20:00 (MST-7)
Location: LANDUSKY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported several power poles blown down along seven-mile road, between US Highway 191 and Zortman.  Trees were bending in the wind as the storm passed. Power was out across the area.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:45:00 to 27-JUN-19 18:45:00 (MST-7)
Location: SUN PRAIRIE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 6-inch diameter tree branches blown down.

Hail in MCCONE, MONTANA
From 27-JUN-19 23:10:00 to 27-JUN-19 23:10:00 (MST-7)
Location: CIRCLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated half-dollar size hail, along with heavy rain.

Thunderstorm Wind in MCCONE, MONTANA
From 27-JUN-19 23:10:00 to 27-JUN-19 23:10:00 (MST-7)
Location: CIRCLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated 60 mph wind gusts.

Thunderstorm Wind in VALLEY, MONTANA
From 27-JUN-19 20:40:00 to 27-JUN-19 20:40:00 (MST-7)
Location: OPHEIM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter 5S Opheim estimated wind gusts up to 60 mph.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:10:00 to 27-JUN-19 18:10:00 (MST-7)
Location: MANNING CORRAL RAWS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported tree branches up to 10 inches in diameter blown down.  Wind gusts estimated at 70 mph.

Heavy Rain in ROOSEVELT, MONTANA
From 27-JUN-19 07:00:00 to 27-JUN-19 07:00:00 (MST-7)
Location: MCDONALDS DOT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported at least 3.5 inches of rain.

Hail in MCCONE, MONTANA
From 27-JUN-19 23:05:00 to 27-JUN-19 23:05:00 (MST-7)
Location: CIRCLE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

McCone County dispatch reported hen egg size hail, along with heavy rain.

Heavy Rain in ROOSEVELT, MONTANA
From 27-JUN-19 07:00:00 to 27-JUN-19 07:00:00 (MST-7)
Location: BREDETTE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public measured at least 3.76 inches of rain.

Heavy Rain in ROOSEVELT, MONTANA
From 27-JUN-19 10:34:00 to 27-JUN-19 10:34:00 (MST-7)
Location: BREDETTE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public measured 4.12 inches of rain. Final storm end total.

Thunderstorm Wind in DAWSON, MONTANA
From 27-JUN-19 23:40:00 to 27-JUN-19 23:40:00 (MST-7)
Location: LINDSAY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 64 mph wind gusts, along with dime size hail.

Thunderstorm Wind in DAWSON, MONTANA
From 28-JUN-19 01:30:00 to 28-JUN-19 01:30:00 (MST-7)
Location: INTAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public estimated 60 mph wind gusts with multiple tree limbs blown down.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 17:55:00 to 27-JUN-19 17:55:00 (MST-7)
Location: LANDUSKY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm chaser reported 70 mph wind gusts.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:28:00 to 27-JUN-19 18:28:00 (MST-7)
Location: MALTA SOUTH DOT
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Malta South US-191 DOT site measured a 68 mph wind gust.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:28:00 to 27-JUN-19 18:28:00 (MST-7)
Location: MALTA
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS site at the Malta airport recorded a 68 mph wind gust.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 18:32:00 to 27-JUN-19 18:32:00 (MST-7)
Location: ZORTMAN
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The RAWS site in Zortman recorded at 58 mph wind gust.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 19:13:00 to 27-JUN-19 19:13:00 (MST-7)
Location: CONTENT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated 70 mph wind gusts.

Thunderstorm Wind in VALLEY, MONTANA
From 27-JUN-19 20:08:00 to 27-JUN-19 20:08:00 (MST-7)
Location: BLUFF CREEK RAWS
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Bluff Creek RAWS site measured a 72 mph wind gust.

Thunderstorm Wind in VALLEY, MONTANA
From 27-JUN-19 20:29:00 to 27-JUN-19 20:29:00 (MST-7)
Location: GLASGOW INTL AIRPORT (KGGW)
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

NWS Employee 2NW Glasgow estimated 60 mph wind gusts.

Thunderstorm Wind in PHILLIPS, MONTANA
From 27-JUN-19 20:31:00 to 27-JUN-19 20:31:00 (MST-7)
Location: CONTENT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter estimated 70 mph wind gusts.

Thunderstorm Wind in DAWSON, MONTANA
From 28-JUN-19 00:30:00 to 28-JUN-19 00:30:00 (MST-7)
Location: INTAKE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public 4 NE Intake estimated 60 mph wind gusts.

Hail in DAWSON, MONTANA
From 28-JUN-19 00:00:00 to 28-JUN-19 00:00:00 (MST-7)
Location: BLOOMFIELD
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported golf ball size hail, and damaged crops.

Hail in MCCONE, MONTANA
From 27-JUN-19 23:10:00 to 27-JUN-19 23:30:00 (MST-7)
Location: CIRCLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Cooperative observer reported hail up to the size of golf balls, off and on for at least 20 minutes.

Tornado in PHILLIPS, MONTANA
From 27-JUN-19 18:10:00 to 27-JUN-19 18:13:00 (MST-7)
Location: ZORTMAN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm Chaser and NWS storm survey reported a narrow swath of damage crossing US Highway 191.  Tree tops and power poles snapped.