Slow-moving low pressure combined with ample moisture from an atmospheric river brought heavy snow and strong wind to much of western and central Wyoming. The combination brought local blizzard conditions to portions of Johnson, Natrona, Sweetwater and Fremont Counties that led to multi-day closures of major roads. The heaviest snow fell in the western mountains where reports of over 20 inches of snow were common. The highest amounts fell in northwestern Wyoming where 40 inches fell in southwestern Yellowstone Park and over 30 inches at the Jackson Hole Ski Resort. Reports of over a foot of snow were commonplace in the western Valleys. East of the Continental Divide, over 18 inches of snow was reported in the Absaroka Mountains and Bighorns. In the populated lower elevations, the heaviest snow fell in the northeasterly upslope locations, with up to 14 inches around Casper and close to 20 inches in the foothills to the south of Lander. Across Sweetwater County, winds gusting to around 70 mph brought blizzard conditions that closed Interstate 80 for an extended period, with several people having to be rescued from stranded vehicles.

Winter Storm in JACKSON HOLE, WYOMING
From 19-FEB-23 21:00:00 to 22-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell throughout the Jackson Valley, with amounts generally from 6 to 12 inches. The highest amount fell southwest of Wilson where 17 inches of new snow fell.

Winter Storm in STAR VALLEY, WYOMING
From 20-FEB-23 09:00:00 to 22-FEB-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in portions of the Star Valley. Amounts ranged from 9 inches in Afton to 17 inches near Thayne.

Winter Storm in BIGHORN MOUNTAINS WEST, WYOMING
From 21-FEB-23 09:00:00 to 22-FEB-23 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell in the western Bighorn Mountains. The highest amounts was near Powder River Pass where 20 inches of new snow was reported.

Winter Storm in BIGHORN MOUNTAINS SOUTHEAST, WYOMING
From 21-FEB-23 11:00:00 to 22-FEB-23 14:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell in the eastern Bighorn Mountains. The highest amount was 17 inches at the Cloud Peak SNOTEL site.

Winter Storm in UPPER GREEN RIVER BASIN, WYOMING
From 21-FEB-23 18:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer reported 6 inches of new snow 20 miles northeast of Opal.

Winter Storm in OWL CREEK & BRIDGER MOUNTAINS, WYOMING
From 21-FEB-23 12:00:00 to 22-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy snow and gusty wind resulted in the closure of US Highway 20 through Wind River Canyon for several hours.

Winter Storm in WIND RIVER MOUNTAINS EAST, WYOMING
From 21-FEB-23 09:00:00 to 22-FEB-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell in the east slopes of the Wind River Mountains. The highest amount was 16 inches at the Deer Park SNOTEL site.

Winter Storm in ABSAROKA MOUNTAINS, WYOMING
From 21-FEB-23 02:00:00 to 22-FEB-23 06:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Heavy snow fell through most of the Absarokas. New snowfall amounts generally ranged from 1 to 2 feet.

Winter Storm in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 21-FEB-23 15:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell throughout Natrona County, with amounts ranging from 67 to 14 inches, with the highest amounts near Casper Mountain. The combination of heavy snow and gusty wind made travel nearly impossible for a time, resulting in the closure of Interstate 25 and Highway 20 26.

Blizzard in ROCK SPRINGS & GREEN RIVER, WYOMING
From 22-FEB-23 00:00:00 to 23-FEB-23 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy snow fell throughout the area, with a maximum of 9 inches in Green River. The snow combined with very strong winds, gusting to around 70 mph at times. The two combined to produce blizzard conditions for an extended period that brought closure of most roads for an extended period of time, including Interstate 80.

Winter Storm in NORTHEAST JOHNSON COUNTY, WYOMING
From 21-FEB-23 10:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CocoRaHS observer reported 7 inches of snow near Buffalo. A combination of strong wind and heavy snow made travel nearly impossible for a time and resulted in the closure of Interstates 25 and 90 for a time.

Winter Storm in SOUTHEAST JOHNSON COUNTY, WYOMING
From 21-FEB-23 10:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A CocoRaHS observer reported 12 inches of snow near Sussex. A combination of strong wind and heavy snow made travel nearly impossible for a time and resulted in the closure of Interstate 25.

Winter Storm in YELLOWSTONE NATIONAL PARK, WYOMING
From 22-FEB-23 00:00:00 to 22-FEB-23 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy snow fell throughout the area, with a maximum of 9 inches in Green River. The snow combined with very strong winds, gusting to around 70 mph at times.

Winter Storm in WIND RIVER BASIN, WYOMING
From 21-FEB-23 15:00:00 to 22-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts around the Wind River Basin ranged from 7 inches at Shoshoni to 11 inches in Riverton.

Winter Storm in LANDER FOOTHILLS, WYOMING
From 21-FEB-23 16:00:00 to 22-FEB-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

New snowfall amounts around Lander generally ranged from 8 to 12 inches; with up to 20 inches in Sinks Canyon State Park.

Winter Storm in CASPER MOUNTAIN, WYOMING
From 21-FEB-23 14:00:00 to 22-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

The Casper Mountain SNOTEL site reported 12 inches of new snow.

Winter Storm in YELLOWSTONE NATIONAL PARK, WYOMING
From 19-FEB-23 21:00:00 to 21-FEB-23 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Very heavy snow fell in Yellowstone Park. There were widespread reports of over a foot of snow, with many locations seeing over two feet. The heaviest snow fell in the southwestern portion of the park, where 40 inches of new snow fell to the west of the South Entrance.

Winter Storm in CODY FOOTHILLS, WYOMING
From 21-FEB-23 09:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in much of the northern portions of the Cody Foothills. Amounts around Cody generally ranged from 4 to 8 inches; but 19 inches was measured at Pahaska.

Blizzard in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 22-FEB-23 01:00:00 to 22-FEB-23 07:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A combination of heavy snow and winds gusting over 40 mph brought blizzard conditions that led to closure of many roads, including US 287.

Winter Storm in WIND RIVER MOUNTAINS WEST, WYOMING
From 21-FEB-23 11:00:00 to 22-FEB-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

In the Wind River Range to the east of Big Sandy, 12 inches of new snow fell.

Winter Storm in NORTH BIG HORN BASIN, WYOMING
From 21-FEB-23 18:00:00 to 22-FEB-23 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CocoRaHS observer reported 6 inches of snow near Shell.

Winter Storm in TETON & GROS VENTRE MOUNTAINS, WYOMING
From 19-FEB-23 21:00:00 to 21-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Heavy snow fell throughout the Tetons, with widespread reports of over a foot of new snow. The highest amounts fell at the Jackson Hole Ski Resort, with 31 inches of new snow on the summit.

Winter Storm in SALT RIVER & WYOMING RANGES, WYOMING
From 20-FEB-23 03:00:00 to 21-FEB-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Over a foot of new snow was widespread across the Salt and Wyoming Range, with a maximum of 26 inches of new snow 16 miles east-northeast of Turnerville.

Blizzard in EAST SWEETWATER COUNTY, WYOMING
From 22-FEB-23 00:00:00 to 22-FEB-23 16:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Heavy snow fell throughout the area, with a maximum of 9 inches in Wamsutter. The snow combined with very strong winds, gusting to around 70 mph at times. The two combined to produce blizzard conditions for an extended period that brought closure of most roads for an extended period of time, including Interstate 80. Several people had to be rescued from stranded vehicles at the height of the storm.

Winter Storm in SOUTHWEST BIG HORN BASIN, WYOMING
From 21-FEB-23 12:00:00 to 22-FEB-23 17:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

A COOP observer measured 9 inches of snow in Luzerne.

Winter Storm in SOUTHEAST BIG HORN BASIN, WYOMING
From 21-FEB-23 13:00:00 to 22-FEB-23 23:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter measured 6 inches of snow to the north of Ten Sleep.

Winter Storm in UPPER GREEN RIVER BASIN FOOTHILLS, WYOMING
From 21-FEB-23 12:00:00 to 22-FEB-23 21:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CocoRaHS observer reported 6 inches of new snow near Bondurant.