A combination of an unusually cold air mass, calm wind and fresh snow cover brought very cold temperatures to much of western and central Wyoming. Temperatures as low as 19 below occurred in Yellowstone Park. Several stations had all time record lows for the month of April, including Riverton, Buffalo, Greybull and Worland, Wyoming. The record low temperature at Worland, Wyoming was especially noteworthy, since it broke a record that stood since 1947.

Extreme Cold/Wind Chill in YELLOWSTONE NATIONAL PARK, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very cold temperatures occurred in Yellowstone Park. The lowest temperature recorded was 19 below zero at Grant Village.

Extreme Cold/Wind Chill in NATRONA COUNTY LOWER ELEVATIONS, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Very cold temperatures occurred in Natrona County. The cold temperatures included minus 5 degrees at the Natrona County airport, the second lowest April temperature recorded since records starting being kept in 1938.

Extreme Cold/Wind Chill in CODY FOOTHILLS, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very cold temperatures occurred in the Cody Foothills. The lowest temperature recorded was 7 below zero near Meeteetse, Wyoming.

Extreme Cold/Wind Chill in YELLOWSTONE NATIONAL PARK, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very cold temperatures occurred in Hot Springs County. The lowest temperature recorded was 2 below zero to the northeast of Thermopolis, Wyoming.

Extreme Cold/Wind Chill in SOUTHEAST BIG HORN BASIN, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Very cold temperatures occurred in Washakie County, Wyoming. At the Worland, Wyoming airport, a low temperature of 2 degrees occurred. This is the all time low temperature for Worland,Wyoming, with records dating back to 1947.

Extreme Cold/Wind Chill in NORTHEAST JOHNSON COUNTY, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 13:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Very cold temperatures occurred in Northern Johnson County. At the Buffalo, Wyoming Airport, a low temperature of 2 degrees tied the all-time April record low temperature.

Extreme Cold/Wind Chill in SOUTHEAST JOHNSON COUNTY, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very cold temperatures occurred in southern Johnson County. The lowest temperature recorded was 5 below zero at Kaycee, Wyoming.

Extreme Cold/Wind Chill in UPPER WIND RIVER BASIN, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Very cold temperatures occurred in the Upper Wind River Basin. The cold temperatures included minus 5 degrees at DuBois, Wyoming and minus 9 degrees at Crowheart, Wyoming.

Extreme Cold/Wind Chill in WIND RIVER BASIN, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Very cold temperatures occurred in the Wind River Basin. The low temperature of 2 degrees at the Riverton, Wyoming airport was 2 degrees, the lowest record temperature for the month of April since records were kept since 1995.

Extreme Cold/Wind Chill in LANDER FOOTHILLS, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Very cold temperatures occurred in the Lander, Wyoming Foothills. At the the Lander, Wyoming Airport, the low of 2 degrees was the 4th lowest April low temperature ever.

Extreme Cold/Wind Chill in GREEN MOUNTAINS & RATTLESNAKE RANGE, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Very cold temperatures occurred in the Green Mountains. The cold temperatures included minus 2 degrees at Jeffrey City, Wyoming.

Extreme Cold/Wind Chill in UPPER GREEN RIVER BASIN FOOTHILLS, WYOMING
From 03-APR-20 00:00:00 to 03-APR-20 12:00:00 (MST-7)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Very cold temperatures occurred in the Upper Wind River Basin. The cold temperatures included minus 10 degrees at Daniel, Wyoming.