Widespread snowfall occurred over much of southeast Wyoming on the 21st through the 23rd. Heaviest snowfall occurred over much of Carbon County in south-central Wyoming with blizzard conditions leading to an extended closure of Interstate 80 through the area. Numerous search and rescues were conducted for stranded motorists along the roadway.

Blizzard in CENTRAL CARBON COUNTY, WYOMING
From 22-FEB-23 04:40:00 to 22-FEB-23 17:00:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet stations along Interstate 80 at Walcott Junction (WY14) and Sinclair (WY15) reported one-quarter mile visibility in falling and blowing snow with 35 to 50 mph wind gusts during this period. Interstate 80 was closed near Rawlins for an extended period of time until late on the 24th. Local emergency management reported local power outages along with numerous search and rescue operations to collect stranded motorists. COOP observer 1 mile north of Rawlins reported a storm total snowfall of 18 inches.

Blizzard in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 21-FEB-23 22:36:00 to 22-FEB-23 17:00:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations along Interstate 80 reported one-quarter mile visibility in falling and blowing snow with 45 to 55 mph wind gusts during this period, including Halleck Ridge (WY18) and Elk Mountain (WY19). Interstate 80 was closed between Laramie and Rawlins for an extended period of time until late on the 24th. CoCoRaHS observers near Elk Mountain reported a storm total snow accumulation of 14 to 18 icnhes.

Blizzard in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 22-FEB-23 09:28:00 to 22-FEB-23 14:24:00 (MST-7)
Reported by: Department of Highways

WYDOT webcams from Muddy Gap showed whiteout conditions due to falling and blowing snow for most of the day. Nearby WYDOT mesonet station Pathfinder (KPAT) along highway WY-220 reported one-quarter mile visibility with winds gusting around 45 mph during this time.

Blizzard in SHIRLEY BASIN, WYOMING
From 22-FEB-23 09:00:00 to 22-FEB-23 15:00:00 (MST-7)
Reported by: Emergency Manager

Emergency manager reported ongoing search and rescues for utility workers attempting to restore power to the area and for families trapped in their homes near the town of Medicine Bow due to snow drifts up to 14 feet high.

Winter Storm in SOUTHWEST CARBON COUNTY, WYOMING
From 21-FEB-23 13:10:00 to 22-FEB-23 19:10:00 (MST-7)
Reported by: Department of Highways

WYDOT reported 6 inches of snowfall in Baggs with 1 to 2 foot drifts just outside of town. Received reports of 7-foot drifts north of Baggs along highway WY-789.

Heavy Snow in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 21-FEB-23 12:15:00 to 22-FEB-23 17:55:00 (MST-7)
Reported by: COOP Observer

COOP observer 4 miles north of Saratoga reported a storm total snow accumulation of 11 inches.

Heavy Snow in NORTH LARAMIE RANGE, WYOMING
From 21-FEB-23 16:00:00 to 22-FEB-23 17:00:00 (MST-7)
Reported by: SNOTEL

La Prele Creek SNOTEL site (elevation 8375 feet) estimated 18 inches of snow accumulation with 1 inch of snow water equivalent and 18:1 snow to liquid ratios.

Heavy Snow in SIERRA MADRE RANGE, WYOMING
From 20-FEB-23 12:00:00 to 22-FEB-23 17:00:00 (MST-7)
Reported by: SNOTEL

Numerous SNOTEL sites estimated between 20 and 48 inches of snow accumulation. Old Battle SNOTEL site (elevation 10000 feet) estimated 48 inches of snow accumulation with 3.2 inches of snow water equivalent and 15:1 snow to liquid ratios.

Heavy Snow in SNOWY RANGE, WYOMING
From 20-FEB-23 05:00:00 to 22-FEB-23 17:00:00 (MST-7)
Reported by: SNOTEL

Numerous SNOTEL sites estimated between 22 and 42 inches of snow accumulation. Med Bow SNOTEL site (elevation 10510 feet) estimated 42 inches of snow accumulation with 2.8 inches of snow water equivalent and 15:1 snow to liquid ratios.

Winter Storm in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 21-FEB-23 14:10:00 to 22-FEB-23 19:10:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer located 3 miles east of Douglas reported a 2-day snow total of 12.3 inches. Additional observers near Glenrock reported 6 to 9 inches of accumulation during this time. Interstate 25 was closed between Douglas and Casper for an extended period of time due to winter conditions.

Winter Storm in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 21-FEB-23 19:30:00 to 22-FEB-23 18:20:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer located 20 miles southwest of Wheatland reported a storm total snow accumulation of 8.2 inches.

Winter Storm in EAST PLATTE COUNTY, WYOMING
From 21-FEB-23 18:50:00 to 22-FEB-23 18:20:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer located 1 mile north of Wheatland reported a storm total snow accumulation of 10.5 inches. Interstate 25 between Wheatland and Douglas was closed for an extended period of time due to winter conditions.

Winter Storm in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 21-FEB-23 18:00:00 to 22-FEB-23 19:00:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer located 22 miles east-northeast of Laramie near Horse Creek reported a storm total snow accumulation of 10 inches.

Winter Storm in SOUTH LARAMIE RANGE, WYOMING
From 21-FEB-23 18:00:00 to 22-FEB-23 19:00:00 (MST-7)
Reported by: Department of Highways

Interstate 80 was closed between Cheyenne and Laramie for an extended period of time due to winter conditions.

Winter Storm in NIOBRARA COUNTY, WYOMING
From 21-FEB-23 15:00:00 to 22-FEB-23 21:00:00 (MST-7)
Reported by: CoCoRaHS

Estimated 5 to 8 inches of snow accumulation near Lusk based on nearby COOP and CoCoRaHS observers.

Winter Weather in CENTRAL LARAMIE COUNTY, WYOMING
From 21-FEB-23 20:10:00 to 22-FEB-23 19:50:00 (MST-7)
Reported by: Official NWS Observations

Measured 5.5 inches of storm total accumulation including a 2-hour period of heavy snowfall and limited visibility late in the afternoon on the 22nd.

Extreme Cold/Wind Chill in CENTRAL LARAMIE COUNTY, WYOMING
From 22-FEB-23 22:00:00 to 23-FEB-23 04:30:00 (MST-7)
Reported by: ASOS

Cheyenne Airport ASOS station (KCYS) reported wind chills as low as 37 degrees below zero with a minimum temperature of 19 degrees below zero.

Extreme Cold/Wind Chill in LARAMIE VALLEY, WYOMING
From 22-FEB-23 21:00:00 to 23-FEB-23 03:40:00 (MST-7)
Reported by: ASOS

Laramie Airport ASOS station (KLAR) reported wind chills as low as 42 degrees below zero with a minimum temperature of 23 degrees below zero.

Extreme Cold/Wind Chill in GOSHEN COUNTY, WYOMING
From 23-FEB-23 02:35:00 to 23-FEB-23 07:45:00 (MST-7)
Reported by: ASOS

Torrington Airport ASOS station (KTOR) reported wind chills as low as 38 degrees below zero with a minimum temperature of 23 degrees below zero.

Extreme Cold/Wind Chill in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 22-FEB-23 22:45:00 to 23-FEB-23 08:45:00 (MST-7)
Reported by: ASOS

Douglas Airport ASOS station (KDGW) reported wind chills as low as 45 degrees below zero with a minimum temperature of 30 degrees below zero.

Extreme Cold/Wind Chill in EAST PLATTE COUNTY, WYOMING
From 22-FEB-23 23:30:00 to 23-FEB-23 02:50:00 (MST-7)
Reported by: AWOS

Wheatland Airport AWOS station at Phifer Airfield (KEAN) reported wind chills as low as 34 degrees below zero with a minimum temperature of 24 degrees below zero.

Extreme Cold/Wind Chill in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 22-FEB-23 21:00:00 to 23-FEB-23 07:35:00 (MST-7)
Reported by: AWOS

Saratoga Airport AWOS station (KSAA) reported wind chills as low as 42 degrees below zero with a minimum temperature of 22 degrees below zero.

Extreme Cold/Wind Chill in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 22-FEB-23 19:00:00 to 23-FEB-23 02:00:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations along Interstate 80 between Laramie and Rawlins reported wind chills as low as 43 degrees below zero.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE, WYOMING
From 22-FEB-23 21:00:00 to 23-FEB-23 01:00:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations along Interstate 80 between Laramie and Cheyenne reported wind chills as low as 44 degrees below zero.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 22-FEB-23 19:00:00 to 23-FEB-23 05:25:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations along Interstate 80 between Laramie and Cheyenne reported wind chills as low as 41 degrees below zero.

Extreme Cold/Wind Chill in EAST LARAMIE COUNTY, WYOMING
From 22-FEB-23 19:00:00 to 23-FEB-23 05:40:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet station Gun Barrel (KGUN) along Highway US-85 reported wind chills as low as 40 degrees below zero.