A multi-day period of snowfall across much of southeast Wyoming areas receiving over 6 inches of snowfall while mountain area received multiple feet of snow accumulation. Additionally, blizzard conditions and heavy snowfall led to a large scale, multi-vehicle accident along Interstate 80 between Laramie and Rawlins resulting in multiple injuries and one fatality. Interstate 80 was closed for an extended period of time due to winter conditions and crashes.

Winter Storm in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 28-JAN-23 02:30:00 to 30-JAN-23 11:00:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer located 8 miles southwest of Wheatland reported 10.4 inches of snow accumulation over a multiday period. Received additional reports of impassable roads southwest of Wheatland due to snow drifts with strong winds.

Winter Weather in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 27-JAN-23 19:20:00 to 30-JAN-23 01:00:00 (MST-7)
Reported by: CoCoRaHS

Numerous CoCoRaHS observers near Douglas and Glenrock reported multiday snow accumulation totaling around 4 to 7 inches.

Winter Weather in GOSHEN COUNTY, WYOMING
From 28-JAN-23 07:40:00 to 30-JAN-23 04:20:00 (MST-7)
Reported by: CoCoRaHS

Numerous CoCoRaHS observers reported a multiday snow accumulation of 4 to 6 inches near Fort Laramie.

Winter Weather in CENTRAL LARAMIE COUNTY, WYOMING
From 28-JAN-23 13:40:00 to 28-JAN-23 14:10:00 (MST-7)
Reported by: Public

Snow Squall. Received report of visibility less than one-eight of a mile in falling and blowing snow 6 miles north of North Cheyenne near the intersection of Interstate 25 and US Highway 85.

Blizzard in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 26-JAN-23 14:14:00 to 27-JAN-23 22:48:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet station Arlington (KARL) along Interstate 80 reported below one-quarter mile visibility and winds gusting up to 50 mph for over 3 hours. Elk Mountain WYDOT mesonet station also reported blizzard conditions during this time. Interstate 80 between Laramie and Rawlins was closed for an extended period of time due to winter conditions.

Winter Storm in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 28-JAN-23 02:23:00 to 30-JAN-23 11:00:00 (MST-7)
Reported by: Department of Highways

Interstate 80 between Laramie and Rawlins was closed for an extended period of time due to winter conditions and a large scale multi-vehicle accident. A total of 44 cars and trucks were involved with the pileups at mile markers 261 and 266. CoCoRaHS observer near Elk Mountain reported a multiday snowfall total over 25 inches.

Heavy Snow in SIERRA MADRE RANGE, WYOMING
From 26-JAN-23 18:00:00 to 30-JAN-23 07:00:00 (MST-7)
Reported by: SNOTEL

Numerous SNOTELs estimated between 30 and 70 inches of snowfall over the multiday period. Whiskey Park SNOTEL (elevation 8950 feet) estimated 70 inches of snowfall over the 84 hour period with 3.5 inches of snow water equivalent and 20:1 snow to liquid ratios.

Heavy Snow in SNOWY RANGE, WYOMING
From 26-JAN-23 18:00:00 to 30-JAN-23 07:00:00 (MST-7)
Reported by: SNOTEL

Numerous SNOTELs estimated between 40 and 94 inches of snowfall over the multiday period. Med Bow SNOTEL (elevation 10510 feet) estimated 94 inches of snowfall over the 84 hour period with 4.7 inches of snow water equivalent and 20:1 snow to liquid ratios.

Heavy Snow in NORTH LARAMIE RANGE, WYOMING
From 26-JAN-23 23:00:00 to 30-JAN-23 11:00:00 (MST-7)
Reported by: SNOTEL

La Prele Creek SNOTEL (elevation 8375 feet) estimated 20.6 inches of snowfall over the multiday period with 1.1 inches of snow water equivalent.

Winter Storm in EAST PLATTE COUNTY, WYOMING
From 28-JAN-23 02:30:00 to 30-JAN-23 11:00:00 (MST-7)
Reported by: CoCoRaHS

CoCoRaHS observer in Wheatland reported over 6 inches of snow accumulation. Received additional reports of impassable roads in and around Wheatland due to snow drifts with strong winds.