A strong pressure gradient, coupled with strong 60-80 knot winds at the mid levels, resulted in yet another round of gusty winds across the Plains of North-Central Montana, as well as a few areas in Southwest Montana, particularly in Madison County. Some snow also fell with this system, with 12 inches of snow reported at Teton Pass Ski Resort and 14 inches along the MT-ID border near West Yellowstone.

High Wind in JUDITH BASIN, MONTANA
From 11-DEC-21 06:23:00 to 11-DEC-21 20:45:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts to 65 mph were measured across Judith Basin County through the day, with the highest wind gust of 65 mph recorded at Benchland at 8:45 pm.

High Wind in SOUTHERN LEWIS AND CLARK, MONTANA
From 11-DEC-21 08:15:00 to 11-DEC-21 11:00:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Isolated wind gusts to 60 mph occurred in Southern Lewis and Clark County.

High Wind in EASTERN GLACIER, MONTANA
From 11-DEC-21 05:56:00 to 11-DEC-21 09:56:00 (MST-7)
Magnitude: 73.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Cut Bank ASOS reports high wind gusts through at least 10 am.

High Wind in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 11-DEC-21 05:00:00 to 11-DEC-21 20:00:00 (MST-7)
Magnitude: 72.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Wind gusts along the Rocky Mountain Front exceed 80 mph through the day, with isolated wind gusts over 90 mph at Deep Creek RAWS.

High Wind in BROADWATER, MONTANA
From 11-DEC-21 01:15:00 to 11-DEC-21 01:15:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Sensor 14 miles east of Townsend recorded a wind gust of 60 mph. This was the only report in the county through the event.

High Wind in FERGUS, MONTANA
From 11-DEC-21 07:52:00 to 11-DEC-21 21:52:00 (MST-7)
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Sporadic high wind gusts over 58 mph were recorded across Fergus County, with the peak wind gust of 68 mph recorded 7 ENE of Denton at 8:58 am.

High Wind in HILL, MONTANA
From 11-DEC-21 10:15:00 to 11-DEC-21 10:15:00 (MST-7)
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 6.4 miles SW of Havre reports wind gust of 66 mph.

High Wind in LIBERTY, MONTANA
From 11-DEC-21 13:56:00 to 11-DEC-21 16:38:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Isolated wind gusts to 60 mph occurred in Liberty county.

High Wind in GALLATIN, MONTANA
From 11-DEC-21 10:30:00 to 11-DEC-21 14:45:00 (MST-7)
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Wind gusts between 58-61 mph were recorded across Gallatin County between 10:30 am and 2:45 pm on 12/11/21.

High Wind in CASCADE, MONTANA
From 11-DEC-21 11:50:00 to 11-DEC-21 11:50:00 (MST-7)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Great Falls ASOS (kgtf) recorded a wind gust of 62 mph.

High Wind in CHOUTEAU, MONTANA
From 11-DEC-21 06:15:00 to 11-DEC-21 12:00:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Winds across Choteau County gusted over 60 mph, starting at 6:15 and lasting through at least noon. Highest report occurred at noon at a mesonet station 10.2 miles south of Loma.

High Wind in MADISON, MONTANA
From 11-DEC-21 11:27:00 to 11-DEC-21 12:27:00 (MST-7)
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Norris hill recorded high wind gusts to 71 mph around for about an hour either side of noon.

High Wind in SOUTHERN ROCKY MOUNTAIN FRONT, MONTANA
From 11-DEC-21 01:30:00 to 11-DEC-21 21:30:00 (MST-7)
Magnitude: 76.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Widespread high winds. Peak wind gust of 88 mph recorded by a mesonet station along the Rocky Mountain Front (dellwo).

High Wind in EASTERN PONDERA, MONTANA
From 11-DEC-21 13:00:00 to 11-DEC-21 14:45:00 (MST-7)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet station 6 miles NW of Ledger reports high wind gusts to 71 mph.

High Wind in EASTERN TETON, MONTANA
From 11-DEC-21 05:00:00 to 11-DEC-21 16:00:00 (MST-7)
Magnitude: 35.00 ES
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Estimated high sustained winds of 40 mph from about 5 am until about 4 pm. Peak wind gust estimated around 55 mph during that time.

Winter Weather in GALLATIN, MONTANA
From 12-DEC-21 05:40:00 to 13-DEC-21 05:40:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media report of 14 inches of snow west of West Yellowstone. Appears to have been an isolated report.

Heavy Snow in NORTH ROCKY MOUNTAIN FRONT, MONTANA
From 11-DEC-21 12:00:00 to 12-DEC-21 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Automated SNOTEL equipment at Mount Lockhart estimated an event total of 16 inches of new snow. Equipment at Waldron estimated an event total of 11 inches of new snow. Equipment at Many Glacier estimated an event total of 7 inches of new snow. Equipment at Badger Pass estimated an event total of 9 inches of new snow.

High Wind in TOOLE, MONTANA
From 11-DEC-21 10:00:00 to 11-DEC-21 14:00:00 (MST-7)
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Multiple high wind gusts to 75 mph across the county. Highest wind gust (75 mph) was recorded 3 miles SE of Sunburst.

Heavy Snow in SOUTHERN ROCKY MOUNTAIN FRONT, MONTANA
From 11-DEC-21 08:00:00 to 12-DEC-21 08:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Teton Ski resort in the mountains reported 12 inches of new snow.