A potent storm developed over Colorado and moved northeastward, spreading heavy snow across much of central Wyoming. The highest snowfall occurred at Midwest in northeastern Natrona County where 24 inches of snow was measured. Amounts greater than 10 inches were also reported in Johnson, Fremont, and Sweetwater Counties. A tight pressure gradient developed as well, with the strongest wind occurring in northern Johnson County. Wind gusts past 50 mph occurred for several days, resulting in the closure of Interstate 25 for a few days. Many major roads were shut down at the height of the storm.

Winter Storm in SOUTHWEST BIG HORN BASIN, WYOMING
From 12-DEC-22 12:00:00 to 13-DEC-22 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snow amounts between Thermopolis and Luzerne generally ranged from 6 to 8 inches.

Winter Storm in OWL CREEK & BRIDGER MOUNTAINS, WYOMING
From 12-DEC-22 12:00:00 to 13-DEC-22 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A combination of snow and strong wind caused the closure of the Highway 120 through the Wind River Canyon for several hours.

Winter Storm in SOUTHEAST JOHNSON COUNTY, WYOMING
From 12-DEC-22 17:00:00 to 14-DEC-22 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A combination of strong wind and blowing snow resulted in the closure of Interstate 25 for several hours.

Winter Storm in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 12-DEC-22 18:00:00 to 14-DEC-22 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts in Natrona County ranged from 5 inches at Powder River to 10 inches at Casper to 24 inches in Midwest. The snow was accompanied by strong wind to bring the closure of Interstate 25 and US 20 26 for several hours.

Winter Storm in CASPER MOUNTAIN, WYOMING
From 12-DEC-22 18:00:00 to 14-DEC-22 03:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Casper Mountain SNOTEL measured 12 inches of new snow.

Winter Storm in EAST SWEETWATER COUNTY, WYOMING
From 12-DEC-22 19:00:00 to 13-DEC-22 19:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 13 inches of snow at Wamsutter. Interstate 80 was closed for many hours by a combination of strong wind an blowing snow.

Winter Storm in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 12-DEC-22 18:00:00 to 14-DEC-22 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A combination of snow and gusty wind caused the closure of US 287 for over 48 hours.

Winter Storm in WIND RIVER MOUNTAINS EAST, WYOMING
From 12-DEC-22 18:00:00 to 14-DEC-22 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A combination of heavy snow and strong wind brought low visibility to South Pass, resulting in the closure of Highway 28.

Winter Storm in WIND RIVER BASIN, WYOMING
From 12-DEC-22 15:00:00 to 13-DEC-22 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Most of the area received over 6 inches of snow, including 8 to 11 inches around the city of Riverton.

Winter Storm in LANDER FOOTHILLS, WYOMING
From 12-DEC-22 13:00:00 to 13-DEC-22 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts around the Lander foothills generally ranged from 6 to 9 inches.

Blizzard in NORTHEAST JOHNSON COUNTY, WYOMING
From 12-DEC-22 17:00:00 to 14-DEC-22 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

There were widespread reports of over 6 inches of snow in northern Johnson County, with 12 inches measures in Buffalo. The snow combined with frequent wind gusts past 40 mph to bring blizzard conditions at times, resulting in the closure of Interstates 25 and 90. The wind continued well after the snow ended, subsiding on December 14th.