On November 7th, deep troughing over the western US kept Montana in an area of large scale ascent and upper level divergence, allowing H700 mb and surface low pressure systems to deepen over Eastern Idaho and move northeastward through Eastern Montana and the Dakotas. This is a favorable track to bring cold temperatures, gusty winds, and sufficient moisture for accumulating snow to Central/North-central Montana. The snowfall was enhanced by northerly upslope flow over the plains onto the higher terrain in addition to the moisture wrapping around the northwest side of the low pressure system.  Snow and gusty northerly winds initially developed over the Northern Rocky Mountain Front early Saturday November 7th, before expanding south and eastward through the remainder of the region Saturday night into Sunday. At the height of the storm, winds gusted into the 40 to 60 mph range, resulting in blizzard conditions over much of Central and North-central Montana.

Blizzard in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 07-NOV-20 23:09:00 to 08-NOV-20 02:39:00 (MST-7)
Reported by: Department of Highways

Sustained winds up to 43 mph with gusts up to 53 mph combined with falling snow for blizzard conditions at 2 SE Browning.

Blizzard in JUDITH BASIN, MONTANA
From 08-NOV-20 00:30:00 to 08-NOV-20 09:00:00 (MST-7)
Reported by: Mesonet

Sustained winds up to 42 mph combined with falling snow for blizzard conditions at 2 WNW Moccasin.

Blizzard in SOUTHERN ROCKY MOUNTAIN FRONT, MONTANA
From 08-NOV-20 01:21:00 to 08-NOV-20 04:36:00 (MST-7)
Reported by: Department of Highways

Sustained winds up to 43 mph with gusts as high as 54 mph combined with falling snow for blizzard conditions at 2 NWs Pendroy.

Blizzard in BLAINE, MONTANA
From 08-NOV-20 20:18:00 to 09-NOV-20 04:18:00 (MST-7)
Reported by: Mesonet

Snow and winds gusting up to 45 mph brought blizzard conditions to 13 S Fort Belknap.

Blizzard in FERGUS, MONTANA
From 08-NOV-20 04:20:00 to 08-NOV-20 04:20:00 (MST-7)
Reported by: Department of Highways

Highway 200 was closed from Eddies Corner to Lewistown due to blizzard conditions. Message relayed via MDT twitter.

Blizzard in EASTERN GLACIER, MONTANA
From 08-NOV-20 07:08:00 to 08-NOV-20 10:56:00 (MST-7)
Reported by: ASOS

The Cut Bank Airport observed sustained winds above 35 mph with gusts up to 50 mph, which combined with falling snow for blizzard conditions. Severe driving conditions reported on State route 213 from Cut Bank to the Canadian border at 9 am lst. Message relayed by MDT twitter.

Blizzard in LIBERTY, MONTANA
From 08-NOV-20 07:45:00 to 08-NOV-20 10:45:00 (MST-7)
Reported by: Trained Spotter

A trained spotter reported 30 to 55 mph winds, visibility less than a quarter mile for blizzard conditions at Joplin. Close to one foot of snow fell and wind chills were near - 15 degrees F. Severe driving conditions were reported on highway 2 from Chester to the Hill County line at 720 am lst via twitter.

Blizzard in CHOUTEAU, MONTANA
From 08-NOV-20 00:00:00 to 08-NOV-20 06:00:00 (MST-7)
Reported by: Trained Spotter

Heavy snow and wind gusts of 30 to 40 mph lead to blizzard conditions at 5 SW Carter. Visibility was about a tenth of a mile. Severe driving conditions were reported on highway 87 from Carter to Fort Benton at 645 am lst via twitter.

Winter Storm in SOUTHERN LEWIS AND CLARK, MONTANA
From 08-NOV-20 02:35:00 to 08-NOV-20 02:35:00 (MST-7)
Reported by: Department of Highways

Severe driving conditions reported on I15 from Lincoln interchange to Sieben interchange. Relayed via twitter.

Winter Storm in SOUTHERN LEWIS AND CLARK, MONTANA
From 08-NOV-20 05:40:00 to 08-NOV-20 05:40:00 (MST-7)
Reported by: Department of Highways

Severe driving conditions reported on I15 form Dearborn to Hardy Creek due to snow and wind. Message relayed via MDT twitter.

Blizzard in CASCADE, MONTANA
From 08-NOV-20 00:30:00 to 08-NOV-20 03:30:00 (MST-7)
Reported by: NWS Employee

Blizzard conditions occurred at 5 WSW Great Falls with visibility down to a quarter mile and winds generally above 35 mph. Snow drifts up to 2 feet were also reported. Severe driving conditions were later reported throughout Cascade County between 12 and 7 am lst.

Blizzard in EASTERN PONDERA, MONTANA
From 07-NOV-20 22:15:00 to 08-NOV-20 04:30:00 (MST-7)
Reported by: Mesonet

Sustained winds up to 41 mph combined with falling snow for blizzard conditions at 5 E Conrad. Severe driving conditions reported on I15 from Brady to Conrad at 915 pm lst.

Blizzard in SOUTHERN ROCKY MOUNTAIN FRONT, MONTANA
From 07-NOV-20 19:14:00 to 08-NOV-20 02:51:00 (MST-7)
Reported by: Mesonet

Falling snow and winds gusting from 35 to 45 mph bring blizzard conditions to the Chouteau Airport. Severe driving conditions reported at 850 pm lst along highway 287 from MP 46 to 64.

Blizzard in EASTERN TETON, MONTANA
From 07-NOV-20 19:14:00 to 08-NOV-20 02:51:00 (MST-7)
Reported by: Mesonet

Snow and winds gusting at 35 mph brought blizzard conditions to the Fairfield area. Snow accumulation was estimated to be 8 inches and drifts were about 2 feet. Times estimated with those at the Chouteau Airport. Severe driving conditions reported at 750 pm lst on I15 from Dutton to Pondera County line.

Blizzard in FERGUS, MONTANA
From 08-NOV-20 07:49:00 to 08-NOV-20 10:54:00 (MST-7)
Reported by: ASOS

Snow with winds gusting up to 37 mph brought blizzard conditions to the Lewistown Airport.

Blizzard in TOOLE, MONTANA
From 07-NOV-20 22:51:00 to 08-NOV-20 04:06:00 (MST-7)
Reported by: Department of Highways

Sustained winds up to 45 mph with gusts up to 53 mph combined with falling snow for blizzard conditions at 6 NNW Sunburst. Neighboring Eastern Glacier and Pondera Counties were reporting severe driving conditions.

Blizzard in JUDITH BASIN, MONTANA
From 08-NOV-20 05:40:00 to 08-NOV-20 05:40:00 (MST-7)
Reported by: Department of Highways

Highway 191 closed from Garneill to Eddies Corner due to blizzard conditions. Portions of this highway run through both Judith Basin and Fergus Counties. Message relayed via MDT twitter.

Blizzard in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 08-NOV-20 16:50:00 to 08-NOV-20 16:50:00 (MST-7)
Reported by: Department of Highways

State route 464 (Duck Lake Rd) closed from Browning to St. Marys due to blizzard conditions. Message was relayed by MDT twitter.

Blizzard in HILL, MONTANA
From 08-NOV-20 06:00:00 to 08-NOV-20 09:00:00 (MST-7)
Reported by: Department of Highways

Snow and winds gusting up to 50 mph combined for blizzard conditions at Inverness. Severe driving conditions were reported on highway 2 form the Liberty County line to Hingham at 720 am lst via twitter.

Winter Storm in BROADWATER, MONTANA
From 08-NOV-20 05:00:00 to 08-NOV-20 05:00:00 (MST-7)
Reported by: Department of Highways

Severe driving conditions reported via twitter on US 12 MM 55 to 77 due to snow and winds.

Winter Storm in SOUTHERN LEWIS AND CLARK, MONTANA
From 07-NOV-20 22:50:00 to 07-NOV-20 22:50:00 (MST-7)
Reported by: Department of Highways

Severe driving conditions reported on highway 12 from MacDonald Pass to Helena due to snow and winds. Relayed by twitter.

Winter Storm in MEAGHER, MONTANA
From 07-NOV-20 21:44:00 to 07-NOV-20 23:47:00 (MST-7)
Reported by: Department of Highways

MDT Deep Creek station reports moderate to heavy snow and wind gusts up to 55 mph.

Winter Storm in MADISON, MONTANA
From 08-NOV-20 00:00:00 to 08-NOV-20 07:00:00 (MST-7)
Reported by: Department of Highways

Wind and snow bring winter storm conditions to Northwestern Madison County. Winds gusted up to 55 mph and visibility dropped to a quarter mile at times in Twin bridges. Severe driving conditions were reported by MDT.

Winter Storm in JEFFERSON, MONTANA
From 08-NOV-20 11:30:00 to 08-NOV-20 11:30:00 (MST-7)
Reported by: Trained Spotter

Snowfall total of 6 inches was reported at Clancy.