A cold front moved across western and central Wyoming. Strong mid level winds mixed to the surface and brought strong wind to portions of the area. The highest wind gust was 79 mph reported along Highway 28 in the Wind River Mountains. Wind gusts past 60 mph were also reported in Park, Johnson, Big Horn, Natrona and Washakie counties in central and western Wyoming. Many roads were impacted as roads were closed to high profile vehicles for a time. On the back side of the storm, and area of snow developed near Casper, Wyoming and brought local amounts over six inches, especially closer to Casper Mountain in Natrona county, Wyoming.

High Wind in SOUTHEAST BIG HORN BASIN, WYOMING
From 22-DEC-20 17:47:00 to 22-DEC-20 19:38:00 (MST-7)
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A maximum wind gust of 67 mph was reported at the Worland, Wyoming airport.

High Wind in CODY FOOTHILLS, WYOMING
From 22-DEC-20 18:54:00 to 22-DEC-20 22:30:00 (MST-7)
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A maximum wind gust of 70 mph was reported along Highway 120 near Meeteetse, Wyoming.

High Wind in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 22-DEC-20 01:46:00 to 22-DEC-20 21:32:00 (MST-7)
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Maximum wind gusts of 60 mph were recorded at Wyoming Boulevard south of Casper, Wyoming, as well as Hiland, Wyoming along Highway 20-26.

High Wind in WIND RIVER MOUNTAINS EAST, WYOMING
From 22-DEC-20 02:26:00 to 22-DEC-20 03:34:00 (MST-7)
Magnitude: 69.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A maximum wind gust of 79 mph was reported along Highway 28 in the Wind River Mountains near Red Canyon.

High Wind in NORTHEAST JOHNSON COUNTY, WYOMING
From 22-DEC-20 14:15:00 to 23-DEC-20 02:18:00 (MST-7)
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A prolonged period of high wind occurred in northern Johnson County, Wyoming. There were numerous wind gusts past 60 mph at the Johnson County, Wyoming airport including a maximum gust of 72 mph. A wind gust of 79 mph occurred along Interstate 90.

High Wind in ROCK SPRINGS & GREEN RIVER, WYOMING
From 22-DEC-20 15:08:00 to 22-DEC-20 15:14:00 (MST-7)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A wind gust of 58 mph was reported along Interstate 80 in Green River, Wyoming.

High Wind in EAST SWEETWATER COUNTY, WYOMING
From 22-DEC-20 15:44:00 to 22-DEC-20 17:44:00 (MST-7)
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A maximum gust of 64 mph was recorded at the Rock Springs, Wyoming airport. In the higher elevations, a gust of 70 mph was reported at the Snow Springs RAWS site.

High Wind in NORTH BIG HORN BASIN, WYOMING
From 22-DEC-20 16:55:00 to 22-DEC-20 19:01:00 (MST-7)
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Wind gusts of 62 and 61 mph were reported at the Powell and Greybull, Wyoming airports, respectively.

Winter Weather in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 22-DEC-20 17:40:00 to 23-DEC-20 05:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts around the city of Casper, Wyoming ranged from six to nine inches. Amounts dropped sharply further west with little or no snow west of Powder River in Natrona County, Wyoming. The snow brought slick and snow covered roads that caused travel problems.