A deep upper-level trough brought widespread snow to southeast Wyoming from the morning of February 21st through the early morning hours on February 22nd. Snowfall amounts were fairly light across the majority of the region, with a localized area of significantly higher totals observed across central Carbon County where heavy banding brought a period of snowfall rates in excess of 2 inches per hour. 12 to 24 inches of snow fell in areas near the Sierra Madre Mountain Range, with 6 to 12 inches in the adjacent Valleys and Foothills including Saratoga and Elk Mountain. At the same time, an intense arctic cold front brought near-record low temperatures to the region. While wind chills eased some during the daytime hours, extreme night time wind chills as low as -35 to -45 degrees F were common for much of the period from February 21st through February 23rd.

Extreme Cold/Wind Chill in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 09:00:00 (MST-7)
Reported by: Department of Highways

Wind chills ranging from -30 to -40 degrees F were common over the North Snowy Range Foothills along the I-80 corridor between Laramie and Rawlins during the early morning hours on both 2/22 and 2/23. A minimum wind chill of -41 degrees F was observed 3 NW of Arlington at 5:52 AM MST on 2/22.

Winter Weather in NIOBRARA COUNTY, WYOMING
From 21-FEB-22 16:00:00 to 22-FEB-22 07:00:00 (MST-7)
Reported by: Mesonet

The NOHRSC Interpolated Snowfall Analysis and nearby observations along the Niobrara County line suggest that pockets of 3-6 inches of snow fell across western and southeastern portions of the county.

Extreme Cold/Wind Chill in NIOBRARA COUNTY, WYOMING
From 22-FEB-22 03:00:00 to 22-FEB-22 07:00:00 (MST-7)
Reported by: Mesonet

A minimum wind chill of -33 degrees F was observed at a UPR site located 7 WNW of Van Tassel at 3:51 AM MST on 2/22.

Winter Weather in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 21-FEB-22 08:00:00 to 22-FEB-22 12:00:00 (MST-7)
Reported by: CoCoRaHS

Snowfall amounts of 2-4 inches were observed across the lower elevations of Converse County per multiple CoCoRaHS observations.

Extreme Cold/Wind Chill in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 23-FEB-22 00:00:00 to 23-FEB-22 15:00:00 (MST-7)
Reported by: Mesonet

A minimum wind chill of -32 degrees F was observed at a Mesonet station located at 5 SSW of Douglas at 5:28 AM MST on 2/23.

Winter Weather in GOSHEN COUNTY, WYOMING
From 21-FEB-22 14:00:00 to 22-FEB-22 06:00:00 (MST-7)
Reported by: COOP Observer

Widespread snow amounts of 2-4 inches were observed across Goshen County. Localized amounts around 6-8 inches were observed in the far northeast corner of the county south of Van Tassel.

Extreme Cold/Wind Chill in GOSHEN COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 22-FEB-22 07:00:00 (MST-7)
Reported by: Mesonet

Wind chills as low as -30 degrees F were recorded at multiple sensors across Goshen County.

Winter Weather in EAST PLATTE COUNTY, WYOMING
From 21-FEB-22 14:00:00 to 22-FEB-22 06:00:00 (MST-7)
Reported by: CoCoRaHS

Total snowfall accumulations of 3 to 5 inches were observed across the lower elevations of Platte County. A CoCoRaHS observer reported 5 inches of snow 1 N of Wheatland.

Extreme Cold/Wind Chill in EAST PLATTE COUNTY, WYOMING
From 22-FEB-22 05:00:00 to 23-FEB-22 10:59:00 (MST-7)
Reported by: Department of Highways

Extreme wind chills occurred across eastern Platte County during the early morning hours on 2/22 and 2/23. The lowest wind chill observed was -34 degrees F at 5:36 AM MST on 2/22, occurring immediately along the Platte/Laramie County line.

Extreme Cold/Wind Chill in EAST LARAMIE COUNTY, WYOMING
From 22-FEB-22 08:00:00 to 23-FEB-22 11:00:00 (MST-7)
Reported by: Mesonet

Extreme wind chills occurred across eastern Laramie County during the early morning hours on 2/22 and 2/23. A minimum wind chill of -32 degrees F was observed 6 S of Albin at 8:48 AM MST on 2/22.

Extreme Cold/Wind Chill in CENTRAL LARAMIE COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 11:00:00 (MST-7)
Reported by: Mesonet

Extreme wind chills occurred across central Laramie County including the city of Cheyenne during the early morning hours on 2/22 and 2/23. A minimum wind chill of -34 degrees F was observed along the Laramie/Platte County line at 5:36 AM MST.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 22-FEB-22 03:15:00 to 23-FEB-22 14:00:00 (MST-7)
Reported by: Mesonet

Multiple sensors across the South Laramie Range Foothills recorded extreme wind chills early in the morning on 2/22, and again during the morning and early afternoon hours on 2/23. A minimum wind chill of -39 degrees F was observed 6 SW of Cheyenne at the WYDOT sensor at Wyo Hill (KWYH).

Extreme Cold/Wind Chill in NORTH LARAMIE RANGE, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: RAWS

The Dodge Creek and Esterbrook RAWS sensors in the North Laramie Range both recorded extreme wind chills during the early morning hours on both 2/22 and 2/23. A minimum wind chill of -35 degrees F was observed at Dodge Creek (DODW4) at 7:44 AM MST on 2/23.

Winter Weather in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 21-FEB-22 14:00:00 to 21-FEB-22 19:00:00 (MST-7)
Reported by: Mesonet

A period of light to moderate snow fell across the Central Laramie Range. The interpolated 24-hour snowfall map from NOHRSC ending at 5:00 AM MST on 2/22 suggests peak snowfall totals of 4-6 inches within a narrow band near Bordeaux.

Extreme Cold/Wind Chill in CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 12:00:00 (MST-7)
Reported by: Department of Highways

Multiple sensors recorded extreme wind chills as low as -30 degrees F across the Central Laramie Range during the morning hours on both 2/22 and 2/23. A minimum wind chill of -30 degrees was recorded at the WYDOT sensor at Bordeaux (KBRX) at 6:02 AM MST on 2/23.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE, WYOMING
From 22-FEB-22 03:15:00 to 23-FEB-22 18:00:00 (MST-7)
Reported by: Mesonet

Numerous sensors recorded wind chills of -35 to -45 degrees F across the South Laramie Range during the morning hours on 2/22, and again through much of the morning and afternoon on 2/23. A minimum wind chill around -46 degrees F was recorded at the WYDOT sensor at Vedauwoo (KVDW) around 6:00 AM MST on 6/23.

Extreme Cold/Wind Chill in LARAMIE VALLEY, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 12:00:00 (MST-7)
Reported by: ASOS

Wind chills to -30 degrees F or colder became widespread across the Laramie Valley during the morning hours on both 2/22 and 2/23. A minimum wind chill of -38 degrees F was observed at the Laramie Airport ASOS (KLAR) at 5:20 AM MST on 2/23.

Winter Weather in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 21-FEB-22 07:00:00 to 22-FEB-22 05:00:00 (MST-7)
Reported by: Mesonet

The National Snowfall Analysis from NOHRSC indicated 4-6 inches of snow fell across Northern Carbon County near the Ferris/Seminoe/Shirley Mountains.

Extreme Cold/Wind Chill in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 23-FEB-22 00:00:00 to 23-FEB-22 11:00:00 (MST-7)
Reported by: Mesonet

A minimum wind chill of -35 degrees F was observed 30 NNE of Rawlins at 1:30 AM MST on 2/23.

Extreme Cold/Wind Chill in SHIRLEY BASIN, WYOMING
From 23-FEB-22 00:00:00 to 23-FEB-22 11:00:00 (MST-7)
Reported by: Mesonet

A UPR sensor located 2 ESE of Medicine Bow recorded a minimum wind chill of -33 degrees F at 4:16 AM MST on 2/23.

Heavy Snow in CENTRAL CARBON COUNTY, WYOMING
From 21-FEB-22 05:00:00 to 22-FEB-22 05:00:00 (MST-7)
Reported by: SNOTEL

Heavy snow fell across portions of central Carbon County, with an estimated total of 24 inches in the northern foothills of the Sierra Madre mountain range per the Sage Creek Basin SNOTEL at 7850 feet.

Extreme Cold/Wind Chill in CENTRAL CARBON COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 11:00:00 (MST-7)
Reported by: Mesonet

Wind chills fell to -30 degrees or lower across portions of Carbon County during the early morning hours on 2/22, and again overnight into 2/23. A minimum wind chill of -37 degrees F was recorded at a Mesonet station 9 W of Rawlins at 10:39 PM MST on 2/22.

Extreme Cold/Wind Chill in SOUTHWEST CARBON COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 22-FEB-22 05:00:00 (MST-7)
Reported by: RAWS

A minimum wind chill of -33 degrees F was recorded at the Cow Creek RAWS station at 3:43 AM MST on 2/22.

Heavy Snow in SIERRA MADRE RANGE, WYOMING
From 21-FEB-22 10:00:00 to 22-FEB-22 10:00:00 (MST-7)
Reported by: SNOTEL

Various SNOTEL observations reported estimated snowfall totals of 6 to 12 inches, with isolated amounts between 12 to 24 inches. The highest totals in the Sierra Madres were observed at Old Battle (OLDW4) at an elevation of 10000 feet, and Sage Creek Basin (SGBW4) at an elevation of 7850 feet. SWE values were generally over 0.6 inch with an estimated snow-liquid-ratio of 15 to 1.

Extreme Cold/Wind Chill in SOUTHWEST CARBON COUNTY, WYOMING
From 22-FEB-22 04:00:00 to 22-FEB-22 05:00:00 (MST-7)
Reported by: Mesonet

Wind chills fell below -30 degrees F along the adjacent slopes of the Sierra Madre range.

Heavy Snow in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 21-FEB-22 12:00:00 to 22-FEB-22 08:00:00 (MST-7)
Reported by: COOP Observer

An official NWS Coop Observer (SFHW4) located 3 N of Saratoga reported a total snowfall of 8.0 inches.

Extreme Cold/Wind Chill in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 22-FEB-22 03:52:00 to 22-FEB-22 09:00:00 (MST-7)
Reported by: Department of Highways

A minimum wind chill of -35 degrees F was observed at the WYDOT sensor at Skyline (KSKL) at 3:52 AM MST on 2/22.

Extreme Cold/Wind Chill in SNOWY RANGE, WYOMING
From 22-FEB-22 04:00:00 to 23-FEB-22 09:00:00 (MST-7)
Reported by: Mesonet

Multiple observations immediately in the vicinity of the foothills of the Snowy Range indicated periods of wind chills to -30 degrees F or less.

Heavy Snow in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 21-FEB-22 12:00:00 to 22-FEB-22 08:00:00 (MST-7)
Reported by: CoCoRaHS

A storm total snowfall of around 6 inches was recorded near Elk Mountain by an area CoCoRaHS observer.