An arctic boundary with an upper level disturbance moved across the region that contributed to enhanced frontogenetic forcing and moisture advection to produce heavy snow and gusty winds followed by cold arctic air and wind chills below minus 30.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE, WYOMING
From 03-MAR-19 05:00:00 to 03-MAR-19 08:00:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor at Pumpkin Vine off of US Highway 287 measured a minimum wind chill of minus 37.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 03-MAR-19 04:00:00 to 03-MAR-19 07:00:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor at Whitaker along Interstate 25 or sixteen miles east of Horse Creek measured a minimum wind chill of minus 34.

Heavy Snow in SIERRA MADRE RANGE, WYOMING
From 01-MAR-19 03:00:00 to 02-MAR-19 22:00:00 (MST-7)
Reported by: SNOTEL

Blackhall Mountain sensor had a storm total snowfall of 25.5 inches.

Heavy Snow in SNOWY RANGE, WYOMING
From 01-MAR-19 03:00:00 to 02-MAR-19 22:00:00 (MST-7)
Reported by: SNOTEL

Brooklyn Lake sensor at elevation of 10,240 feet measured a storm total of 19.5 inches of snow.

Heavy Snow in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 00:00:00 (MST-7)
Reported by: CoCoRaHS

Observer in Elk Mountain measured a storm total of 6.3 inches of snowfall.

Heavy Snow in LARAMIE VALLEY, WYOMING
From 01-MAR-19 22:00:00 to 02-MAR-19 23:00:00 (MST-7)
Reported by: CoCoRaHS

Observer located two miles east-southeast of Laramie measured a storm total of 8.2 inches of snow.

Heavy Snow in SOUTH LARAMIE RANGE, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 01:00:00 (MST-7)
Reported by: COOP Observer

Observer located three miles southeast of Buford measured a storm total snowfall amount of 11.2 inches.

Heavy Snow in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 01:00:00 (MST-7)
Reported by: Trained Spotter

Observer located one mile south-southeast of Federal measured a storm total of 9.0 inches of snowfall.

Heavy Snow in CENTRAL LARAMIE COUNTY, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 01:00:00 (MST-7)
Reported by: NWS Employee

Total snowfall of 6.5 inches measured at observer's home located six miles north of Cheyenne.

Winter Storm in EAST LARAMIE COUNTY, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 01:00:00 (MST-7)
Reported by: CoCoRaHS

Observer located four miles northwest of Carpenter measured a storm total snowfall of 5.5 inches with other observers in the area reporting drifting snow and periods of low visibility during the storm.

Winter Storm in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 01-MAR-19 22:00:00 to 03-MAR-19 01:00:00 (MST-7)
Reported by: Public

Observer located two miles west of Wheatland reported heavy snow measuring after settling at 5.1 with periods of blowing and drifting snow creating low visibilities under half a mile.

Winter Storm in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 01-MAR-19 22:00:00 to 02-MAR-19 12:00:00 (MST-7)
Reported by: COOP Observer

Observer measured snowfall after settling of 5.0 inches. Nearby sensors also had periods of strong winds producing areas of blowing and drifting snow with under one mile visibility.

Extreme Cold/Wind Chill in CENTRAL LARAMIE COUNTY, WYOMING
From 03-MAR-19 06:30:00 to 03-MAR-19 07:30:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Roads sensor near Burns measured a minimum wind chill of minus 31.

Extreme Cold/Wind Chill in EAST LARAMIE COUNTY, WYOMING
From 03-MAR-19 06:00:00 to 03-MAR-19 08:00:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor near Albin measured a minimum wind chill of minus 32.

Extreme Cold/Wind Chill in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 03-MAR-19 00:15:00 to 03-MAR-19 02:00:00 (MST-7)
Reported by: Other Federal Agency

Seminoe Reservoir measured a minimum wind chill of minus 32.

Extreme Cold/Wind Chill in LARAMIE VALLEY, WYOMING
From 02-MAR-19 21:00:00 to 03-MAR-19 08:00:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor at Quealy Dome or fourteen miles northeast of Centennial measured a minimum wind chill of minus 36.

Extreme Cold/Wind Chill in NIOBRARA COUNTY, WYOMING
From 03-MAR-19 07:00:00 to 03-MAR-19 09:00:00 (MST-7)
Reported by: Unknown

Union Pacific Railroad sensor located seven miles west-northwest of Van Tassell measured a minimum wind chill of minus 32.

Extreme Cold/Wind Chill in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 03-MAR-19 04:25:00 to 03-MAR-19 07:25:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor at Strouss Hill or fifteen miles north-northeast of Centennial and the sensor at Cooper Cove or seven miles east-southeast of Arlington both measured minimum wind chills of minus 31.