A potent area of low pressure passed to the south of Wyoming and brought very heavy snow to portions of Wyoming. The heaviest snow fell in a band through Lincoln, Sweetwater, Fremont and Natrona Counties. The most notable snow was in Casper in Natrona County. Two snowfall records were broken. A storm total snowfall of 37.4 inches over 3 calendar days, April 3rd through April 5th, fell at the Casper airport. In addition, an all-time 1-calendar-day snowfall record was set on April 3rd with a 26.7 inches of snow. Both these numbers broke the old records which occurred during the December 23-24, 1982 snowstorm. Other notable snowfall amounts included 20 inches at Afton in Lincoln County, 60 inches of new snow on Casper Mountain and 19 inches in Green River in Sweetwater County. In Fremont County, 48 inches of new snow fell at Atlantic City in the Wind River Mountains. In the lower elevations, 7 to 11 inches of new snow fell around Riverton with up to 18 inches near Lander. The snow was accompanied by gusty wind in the favored locations which brought blizzard conditions at times. As a result of the heavy snow, most major roads in the central and southern portions of the state, including Interstates 25 and 80, where closed for multiple days during the storm. Many schools were closed or went to virtual learning during the height of the storm.

Winter Storm in WIND RIVER MOUNTAINS EAST, WYOMING
From 03-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Very heavy snow fell along the eastern slopes of the Wind River Range. The heaviest snow fell at Atlantic City where 4 feet of new snow fell over 48 hour period. Many SNOTEL locations reported more than 3 feet of new snow.

Winter Storm in LANDER FOOTHILLS, WYOMING
From 03-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

New snowfall amounts around the Lander Foothills generally ranged from 8 to 18 inches, with the highest amounts in the foothills closer to the Wind River Mountains.

Winter Storm in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 03-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A record setting snowstorm occurred in Casper. Both daily and storm record snowfall records were broken at Casper. All areas of Casper received at least 2 feet of snow with a maximum of almost 40 inches on the south side of Casper. Amounts dropped further west and north with 14 inches near Powder River and 7 inches at Midwest. The heavy snow combined with gusty wind resulted in nearly impossible travel conditions for several days. A storm total snowfall of 37.4 inches over 3 calendar days fell at the Casper Airport, April 3rd through April 5th. In addition, an all-time 1-calendar-day snowfall record was set on April 3rd with a 26.7 inches of snow.

Winter Storm in WIND RIVER BASIN, WYOMING
From 03-APR-23 03:00:00 to 04-APR-23 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

New snowfall amounts around the Wind River Basin ranged from 7 inches at Hudson to 10.5 inches at the National Weather Service office to the northwest of Riverton.

Blizzard in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 04-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A combination of heavy snow and strong, gusty wind brought blizzard conditions to the Green and Rattlesnake Ranges. As a result, numerous roads were closed for several days, making transportation nearly impossible.

Blizzard in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 03-APR-23 15:00:00 to 04-APR-23 15:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Heavy snow combined with frequent wind gusts over 40 mph to bring blizzard conditions to portions of Natrona County, bringing road closures and nearly impossible travel conditions.

Winter Storm in CASPER MOUNTAIN, WYOMING
From 03-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

Very heavy snow fell on Casper Mountain, with a maximum amount of 5 feet.

Winter Storm in SOUTHWEST BIG HORN BASIN, WYOMING
From 03-APR-23 12:00:00 to 04-APR-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Locally heavy snow fell to the west of Thermopolis, with 7 inches of snow near Hamilton Dome. Amounts dropped sharply from Thermopolis and eastward.

Winter Storm in NORTHEAST JOHNSON COUNTY, WYOMING
From 03-APR-23 16:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Snowfall amounts in northern Johnson County ranged from 6 to 9 inches.

Winter Storm in SOUTHEAST JOHNSON COUNTY, WYOMING
From 03-APR-23 16:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

A CocoRaHS observer reported 7.5 inches of snow to the northeast of Mayoworth.

Winter Storm in SOUTH LINCOLN COUNTY, WYOMING
From 02-APR-23 00:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy snow fell in southern Lincoln County, including 22.8 inches of new snow near the Fossil Butte National Monument site.

Winter Storm in STAR VALLEY, WYOMING
From 02-APR-23 12:00:00 to 05-APR-23 00:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Many locations in the Star Valley reported over a foot of new snow, including 22 inches of new snow in Afton.

Winter Storm in BIGHORN MOUNTAINS WEST, WYOMING
From 03-APR-23 18:00:00 to 04-APR-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: SNOTEL

To the southeast of Big Trails, 15 inches of new snow fell.

Winter Storm in UPPER GREEN RIVER BASIN, WYOMING
From 03-APR-23 00:00:00 to 04-APR-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

An observer reported 7 inches of new snow near Farson.

Winter Storm in ROCK SPRINGS & GREEN RIVER, WYOMING
From 02-APR-23 20:00:00 to 04-APR-23 20:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Very heavy snow fell through much of Rock Springs and Green River, with amounts ranging from 12 to 20 inches.

Blizzard in EAST SWEETWATER COUNTY, WYOMING
From 03-APR-23 18:00:00 to 04-APR-23 18:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Heavy snowfall amounts up to 20 inches combined with winds gusts up to 60 mph to bring an extended period of blizzard conditions. Interstate 80 was shut down for several days with many people having to be rescued from stranded vehicles. Travel was nearly impossible through the period.