Hazard Report Provided By forecast.weather.gov

Hazardous Weather Outlook
National Weather Service Riverton WY
329 AM MST Fri Dec 19 2025

WYZ001>020-022>030-201430-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
329 AM MST Fri Dec 19 2025

...WINTER STORM WARNING REMAINS IN EFFECT FOR THE MOUNTAINS OF
WESTERN WY FROM 11 AM THIS MORNING TO 5 AM MST SATURDAY...

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR WESTERN VALLEYS OF
WESTERN WY FROM 11 AM THIS MORNING TO 5 AM MST SATURDAY...

...HIGH WIND WARNING REMAINS IN EFFECT FOR PORTIONS OF SOUTHERN,
CENTRAL, NORTHERN WY UNTIL 5 PM MST THIS AFTERNOON...

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and tonight.

Periods of moderate to heavy snowfall continues across the higher
elevation mountains of western WY. Precipitation will be periodic for
western valleys with temperatures expected to warm through the day
Friday. A transition to a mix or rain/snow or wet snow is possible
which may hinder any further accumulation. Winds increase during the
morning with widespread gusty winds expected through the day. High
winds look likely across portions of southern, central, and northern
WY. Eastern slopes of the Wind River, Absaroka, and Bighorn Ranges
including locations such as Lander, Cody, and Buffalo may see a gusts
of 70 mph or more. A cold front passage during the late evening and
early morning on Saturday may produce some chances for showers east
of the Divide. Temperatures may be cold enough for snow with at most a
light coating to inch or two possible.

.DAYS TWO THROUGH SEVEN...Saturday through Christmas Day.

Sunday through Tuesday...Another round of heavy snowfall is possible
across the higher elevations of western WY. Temperatures currently
look too warm for accumulating snow fall across western valleys.
Locations east of the Divide may see little to no precipitation in
association with this system.

Christmas Eve and Christmas Day...Early indications for the
potential of another round of snow mainly across western WY.
Temperatures may be cold enough to support snow fall over lower
elevations but at this time confidence remains low.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
513 PM MST Fri Dec 19 2025

WYZ002-012-201200-
/O.CON.KRIW.WS.W.0015.000000T0000Z-251220T1200Z/
Absaroka Mountains-Teton and Gros Ventre Mountains-
513 PM MST Fri Dec 19 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY...

* WHAT...Additional snow accumulations of 2 to 6 inches across the
  Absarokas and 4 to 8 inches across the Tetons and Gros Ventres.
  Winds gusting as high as 70 mph.

* WHERE...Absaroka Mountains and Teton and Gros Ventre Mountains.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  will impact travel across Teton and Togwotee Passes. Blowing and
  drifting of snow is expected.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.

For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .

For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .

&&

$$

Hazard Report Provided By forecast.weather.gov