A strong jet stream moved across the Billings Forecast Area. Westerly winds aloft at 700mb were around 60-70kts. 850mb winds were also westerly about 40-50kts. Some of these winds aloft mixed to the surface which resulted in high wind gusts across the entire forecast area.

High Wind in SOUTHERN WHEATLAND, MONTANA
From 19-DEC-20 08:27:00 to 20-DEC-20 14:45:00 (MST-7)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Winds gusted to 70 mph at the Kilo RAWS site.

High Wind in FALLON, MONTANA
From 20-DEC-20 15:40:00 to 20-DEC-20 15:40:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 58 mph across the area.

High Wind in GOLDEN VALLEY, MONTANA
From 20-DEC-20 14:00:00 to 20-DEC-20 19:00:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 60 mph across the area.

High Wind in NORTHERN STILLWATER, MONTANA
From 20-DEC-20 12:00:00 to 20-DEC-20 14:40:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Winds gusted to 60 mph across the area.

High Wind in CARTER, MONTANA
From 20-DEC-20 15:00:00 to 20-DEC-20 16:05:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted up to 69 mph across the area.

High Wind in BEARTOOTH FOOTHILLS, MONTANA
From 20-DEC-20 04:30:00 to 20-DEC-20 16:00:00 (MST-7)
Magnitude: 87.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Winds gusted 90 to 100 mph across the foothills.

High Wind in MELVILLE FOOTHILLS, MONTANA
From 20-DEC-20 12:45:00 to 20-DEC-20 14:00:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Winds gusted to 58 mph across the area.

High Wind in NORTHERN SWEET GRASS, MONTANA
From 19-DEC-20 01:55:00 to 20-DEC-20 18:10:00 (MST-7)
Magnitude: 69.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 79 mph across the area.

High Wind in JUDITH GAP, MONTANA
From 20-DEC-20 09:16:00 to 20-DEC-20 16:06:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 69 mph across the area.

High Wind in NORTHERN STILLWATER, MONTANA
From 19-DEC-20 11:00:00 to 19-DEC-20 12:00:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Winds gusted to 58 mph in Molt and 64 mph northeast of Reed Point.

High Wind in MUSSELSHELL, MONTANA
From 20-DEC-20 09:30:00 to 20-DEC-20 09:30:00 (MST-7)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Winds gusted to 63 mph northeast of Roundup.

High Wind in SOUTHWESTERN YELLOWSTONE, MONTANA
From 20-DEC-20 12:21:00 to 20-DEC-20 12:21:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

Winds gusted to 60 mph at the Soda Springs RAWS.

High Wind in NORTHERN ROSEBUD, MONTANA
From 20-DEC-20 13:34:00 to 20-DEC-20 13:34:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 60 mph across the area.

High Wind in CARTER, MONTANA
From 20-DEC-20 15:05:00 to 20-DEC-20 15:05:00 (MST-7)
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 69 mph across the area.

High Wind in SOUTHERN BIG HORN, MONTANA
From 20-DEC-20 11:20:00 to 20-DEC-20 11:20:00 (MST-7)
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Winds gusted to 63 mph across Aberdeen Hill.