An upper level low pressure system moved along the Canadian border throughout the day.  This feature dragged a cold front through Montana that set off multiple thunderstorms.  Some of the storms became severe and one generated a tornado that impacted the town of Glentana.

Thunderstorm Wind in DANIELS, MONTANA
From 18-JUL-22 18:00:00 to 18-JUL-22 18:00:00 (MST-7)
Location: FLAXVILLE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported at least 15 power line poles had snapped and fallen over.

Thunderstorm Wind in MCCONE, MONTANA
From 18-JUL-22 15:45:00 to 18-JUL-22 15:45:00 (MST-7)
Location: COW CREEK DOT
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported, via Facebook, a thunderstorm wind gust of 66 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:20:00 to 18-JUL-22 16:20:00 (MST-7)
Location: DUCK CREEK
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported, using a home weather station, a thunderstorm wind gust of 71 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:24:00 to 18-JUL-22 16:24:00 (MST-7)
Location: GLASGOW INTL AIRPORT (KGGW)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Glasgow Airport ASOS (KGGW) measured a thunderstorm wind gust of 62 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:35:00 to 18-JUL-22 16:35:00 (MST-7)
Location: FT PECK
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a thunderstorm wind gust of 62 mph along with a few small branches down from trees.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:41:00 to 18-JUL-22 16:41:00 (MST-7)
Location: BAYLOR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a thunderstorm wind gust of 60 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:45:00 to 18-JUL-22 16:45:00 (MST-7)
Location: OPHEIM
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a thunderstorm wind gust of 70 mph, along with hail up to the size of dimes and heavy rain.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 18-JUL-22 19:15:00 to 18-JUL-22 19:15:00 (MST-7)
Location: FROID
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated a thunderstorm wind gust of 60 mph, along with pea size hail.

Thunderstorm Wind in PHILLIPS, MONTANA
From 18-JUL-22 15:15:00 to 18-JUL-22 15:15:00 (MST-7)
Location: MALTA SOUTH DOT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported, via Facebook, a Quonset Hut was destroyed.

Thunderstorm Wind in PHILLIPS, MONTANA
From 18-JUL-22 15:15:00 to 18-JUL-22 15:15:00 (MST-7)
Location: MALTA SOUTH DOT
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a thunderstorm wind gust of 61 mph.

Thunderstorm Wind in VALLEY, MONTANA
From 18-JUL-22 16:20:00 to 18-JUL-22 16:20:00 (MST-7)
Location: DUCK CREEK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Public reported, via Facebook, a camper overturned in a driveway and bounced up against the house.

Thunderstorm Wind in ROOSEVELT, MONTANA
From 18-JUL-22 17:35:00 to 18-JUL-22 17:35:00 (MST-7)
Location: MCDONALDS DOT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated thunderstorm wind gusts of 70 mph, with multiple yard items blown around the yard.

Tornado in VALLEY, MONTANA
From 18-JUL-22 16:47:00 to 18-JUL-22 16:56:00 (MST-7)
Location: GLENTANA
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down 5.5 miles southwest of Glentana at 5:47 PM MDT, moving to the northeast and directly impacting the town of Glentana at 5:53 MDT.  Several blue spruce trees were uprooted, several grain hopper bins and some garages and farm machine buildings were destroyed.  The roof from a house was blown off.  The Glentana Hall metal roof peeled off on the south side.  Multiple farm machinery equipment were damaged.  Some straight line wind damage including one dozen power poles snapped, was observed 0.5 miles south of the path of the tornado on South Glentana Road.  The tornado continued toward the northeast and lifted at 5:56 PM MDT, 2.4 miles northeast of Glentana.