Arctic air mass settled into southeast Wyoming late in the month after much of the region received accumulating snowfall. Wind chills on the morning of the 30th and 31st dropped below 20 degrees below zero with a few sites along and west of the Laramie Range dropping below 30 degrees below zero.

Extreme Cold/Wind Chill in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 30-JAN-23 04:00:00 to 30-JAN-23 08:00:00 (MST-7)
Reported by: ASOS

Douglas Airport ASOS station (KDGW) reported wind chills as low as 43 degrees below zero with a minimum temperature of 29 degrees below zero.

Extreme Cold/Wind Chill in NIOBRARA COUNTY, WYOMING
From 30-JAN-23 04:00:00 to 30-JAN-23 08:00:00 (MST-7)
Reported by: Mesonet

Union Pacific Railroad mesonet station LUSK1 (UP114) reported wind chills as low as 30 degrees below zero.

Extreme Cold/Wind Chill in LARAMIE VALLEY, WYOMING
From 29-JAN-23 21:00:00 to 30-JAN-23 03:00:00 (MST-7)
Reported by: ASOS

Laramie Airport ASOS station (KLAR) reported wind chills as low as 30 degrees below zero.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE, WYOMING
From 29-JAN-23 21:00:00 to 30-JAN-23 05:00:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations reported wind chills as low as 39 degrees below zero, including near Buford and Vedauwoo.

Extreme Cold/Wind Chill in SOUTH LARAMIE RANGE FOOTHILLS, WYOMING
From 29-JAN-23 21:00:00 to 30-JAN-23 08:00:00 (MST-7)
Reported by: Department of Highways

Numerous WYDOT mesonet stations reported wind chills as low as 32 degrees below zero.

Extreme Cold/Wind Chill in CONVERSE COUNTY LOWER ELEVATIONS, WYOMING
From 31-JAN-23 00:00:00 to 31-JAN-23 08:00:00 (MST-7)
Reported by: ASOS

Douglas Airport ASOS station (KDGW) reported wind chills as low as 32 degrees below zero with a minimum temperature of 27 degrees below zero.

Extreme Cold/Wind Chill in LARAMIE VALLEY, WYOMING
From 30-JAN-23 23:00:00 to 31-JAN-23 08:00:00 (MST-7)
Reported by: ASOS

Laramie Airport ASOS station (KLAR) reported wind chills as low as 38 degrees below zero with a minimum temperature of 26 degrees below zero.

Extreme Cold/Wind Chill in CENTRAL CARBON COUNTY, WYOMING
From 31-JAN-23 00:00:00 to 31-JAN-23 08:00:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet stations at Sinclair (WY14) and Walcott Junction (WY15) along Interstate 80 reported wind chills as low as 42 degrees below zero.

Extreme Cold/Wind Chill in SOUTHWEST CARBON COUNTY, WYOMING
From 30-JAN-23 23:30:00 to 31-JAN-23 08:00:00 (MST-7)
Reported by: AWOS

Dixon Airport AWOS station (KDWX) reported wind chills as low as 40 degrees below zero.

Extreme Cold/Wind Chill in UPPER NORTH PLATTE RIVER BASIN, WYOMING
From 30-JAN-23 23:30:00 to 31-JAN-23 08:00:00 (MST-7)
Reported by: AWOS

Saratoga Airport AWOS station (KSAA) reported wind chills as low as 42 degrees below zero.

Extreme Cold/Wind Chill in NORTH SNOWY RANGE FOOTHILLS, WYOMING
From 31-JAN-23 00:00:00 to 31-JAN-23 06:00:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet stations near Halleck Ridge along Interstate 80 reported wind chills as low as 35 degrees below zero.

Extreme Cold/Wind Chill in FERRIS/SEMINOE/SHIRLEY MOUNTAINS, WYOMING
From 30-JAN-23 23:30:00 to 31-JAN-23 07:00:00 (MST-7)
Reported by: Department of Highways

Nearby WYDOT mesonet stations along Wyoming Highway 220 reported wind chills as low as 35 degrees below zero.

Extreme Cold/Wind Chill in SHIRLEY BASIN, WYOMING
From 30-JAN-23 23:30:00 to 31-JAN-23 09:00:00 (MST-7)
Reported by: Department of Highways

WYDOT mesonet station Shirley Basin (WY44) along Wyoming Highway 487 reported wind chills as low as 52 degrees below zero.