A well deepening Colorado Low underwent bombogenesis producing widespread heavy snow and blizzard conditions across all of southeastern Wyoming. Conditions initially began as rain on the morning of the 13th with thunderstorms across the far southeastern portion before transitioning over to snow later in the morning. By noon of the 13th, almost all of southeastern Wyoming was under blizzard conditions with Interstates 80 and 25 closed to traffic and communities issuing no travel advised to keep folks off the road. Snow foot drifts of over 10 feet tall were reported with heavy snowfall of over a foot measured. Initial estimates placed livestock losses at 4,100 cattle, 200 sheep and 40 horses statewide from snow and flooding.

Blizzard in GOSHEN COUNTY, WYOMING
From 13-MAR-19 14:05:00 to 13-MAR-19 19:05:00 (MST-7)
Reported by: ASOS

Conditions measured at the Torrington Airport with wind gusts up to 48 mph including a peak wind measurement of of 52 mph at 6:53 PM MDT on the 13th. Widespread snow totals of 6.5 inches up to 15 inches across the area.

Blizzard in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 13-MAR-19 11:00:00 to 13-MAR-19 18:00:00 (MST-7)
Reported by: Department of Highways

Several Wyoming Department of Transportation sensors along Interstate 80 measured periods of blizzard conditions with several sensors recording wind gusts even up to 48 mph.

Blizzard in SOUTHWEST CARBON COUNTY, WYOMING
From 13-MAR-19 02:43:00 to 13-MAR-19 21:43:00 (MST-7)
Reported by: Mesonet

Several periods of high wind criteria gusts above 58 mph coupled with ongoing snow heavy snow brought blizzard conditions. Snow totals were over 15 inches.

Blizzard in SIERRA MADRE RANGE, WYOMING
From 13-MAR-19 11:20:00 to 13-MAR-19 15:20:00 (MST-7)
Reported by: RAWS

Sandstone sensor measured blizzard criteria winds while several SNOTEL sites in the mountains measured over 20 inches of snow.

Blizzard in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 13-MAR-19 09:55:00 to 13-MAR-19 20:55:00 (MST-7)
Reported by: Department of Highways

Conditions reported at the Skyline Wyoming Department of Transportation sensor with highest wind gusts at 40 mph.

Blizzard in SNOWY RANGE, WYOMING
From 13-MAR-19 10:52:00 to 13-MAR-19 20:52:00 (MST-7)
Reported by: Mesonet

Blizzard wind conditions measured at the Sawmill Park sensor while the highest estimated snowfall total by area SNOTEL site up to 45 inches.

Blizzard in LARAMIE VALLEY, WYOMING
From 13-MAR-19 12:19:00 to 13-MAR-19 20:10:00 (MST-7)
Reported by: ASOS

Conditions measured at the Laramie Airport with highest winds gusting to 46 mph and snowfall totals over a foot.

Blizzard in SOUTH LARAMIE RANGE, WYOMING
From 13-MAR-19 08:35:00 to 14-MAR-19 10:40:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensors along Interstate 80 measured prolonged period of blizzard conditions with Crow Creek Snotel measuring an estimated total of 18 inches.

Blizzard in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 13-MAR-19 09:50:00 to 13-MAR-19 22:20:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensors along Interstate 80 observed blizzard conditions.

Blizzard in EAST LARAMIE COUNTY, WYOMING
From 13-MAR-19 10:35:00 to 13-MAR-19 15:35:00 (MST-7)
Reported by: AWOS

Conditions measured by the Pine Bluffs Municipal Airport.

Blizzard in CENTRAL LARAMIE COUNTY, WYOMING
From 13-MAR-19 08:40:00 to 13-MAR-19 17:00:00 (MST-7)
Reported by: ASOS

Site at the Cheyenne Airport measured the reported blizzard conditions. Several stranded vehicles were reported along with stuck vehicles in the City of Cheyenne.  Two Cheyenne Police cruisers were damaged when passing vehicles lost control and hit the vehicles. The officers were not injured. Police had reported over 50 stranded or abandoned vehicles and at least sixteen vehicle accidents. NWS employees reported several 6 foot and larger drifts at their homes and at the office.

Blizzard in CENTRAL CARBON COUNTY, WYOMING
From 13-MAR-19 09:00:00 to 13-MAR-19 15:53:00 (MST-7)
Reported by: Law Enforcement

Wyoming Highway Patrol along with the ASOS at Rawlins reported blizzard conditions during the event. A fatal crash occurred at milepost 219 on Interstate 80 around 9:37 AM. A Semi with two trailers crashed into a previous crash of two tractor trailers. The one driver involved with the first collision was outside of his vehicle when the second collision occurred. The driver then became trapped between his trailer and tractor portion of the other vehicle. He succumbed to his injuries at the scene. No other injuries were reported but the driver of the third semi was likely driving too fast for the winter road conditions, which were slick with ice and blowing snow.

Blizzard in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 13-MAR-19 10:35:00 to 13-MAR-19 18:35:00 (MST-7)
Reported by: ASOS

Blizzard conditions measured at the Douglas, Converse County Airport. Nearby CoCoRaHs observer measured 12.0 inches of snow in addition.

Blizzard in NIOBRARA COUNTY, WYOMING
From 13-MAR-19 16:00:00 to 14-MAR-19 07:30:00 (MST-7)
Reported by: Department of Highways

Worker observed the conditions in Lusk with reports of 18 to 20 inches of snow while the Randall Union Pacific Railraod measured wind gusts up to 55 mph.

Blizzard in NORTH LARAMIE RANGE, WYOMING
From 13-MAR-19 04:44:00 to 14-MAR-19 08:44:00 (MST-7)
Reported by: Other Federal Agency

Dodge Creek and Esterbrook sites recorded blizzard criteria winds in addition to SNOTEL sites measuring over 30 inches of snow.

Blizzard in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 13-MAR-19 17:50:00 to 14-MAR-19 05:50:00 (MST-7)
Reported by: Trained Spotter

Total snowfall estimate of 7 inches give the blowing snow at Muddy Gap. United States Highway 287 was closed through the overnight into the afternoon on the fourteenth. Nearby sites had winds gusting to 40 mph during the period.

Blizzard in SHIRLEY BASIN, WYOMING
From 13-MAR-19 11:50:00 to 14-MAR-19 02:35:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transporation sensor at Shirley Rim measured blizzard conditions.

Blizzard in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 13-MAR-19 09:35:00 to 13-MAR-19 18:30:00 (MST-7)
Reported by: Department of Highways

Wyoming Department of Transportation sensor at Bourdeaux measured the blizzard conditions while Interstate 25 was closed during event due to winter conditions and blowing snow piling up faster than plows could remove.

Blizzard in EAST PLATTE COUNTY, WYOMING
From 13-MAR-19 14:00:00 to 13-MAR-19 19:00:00 (MST-7)
Reported by: Trained Spotter

Observer in Hartville experienced blizzard conditions with visibility down to a couple hundred feet at times. With heavy drifting and blowing snow best estimated on snowfall accumulations were around 10 inches.