Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
517 AM MST Thu Dec 4 2025
WYZ012-024-050330-
/O.CON.KRIW.WS.W.0012.251205T0000Z-251206T2100Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
517 AM MST Thu Dec 4 2025
...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 2 PM MST SATURDAY...
* WHAT...Heavy snow expected. Total snow accumulations of 12 to 20
inches across much of the area with the highest elevations seeing
2 to 3 feet. Gusty winds of 25 to 40 mph will be common. Higher
elevations of the Salt River and Wyoming Ranges could gust above
45 mph.
* WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming
Ranges.
* WHEN...From 5 PM this afternoon to 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult, especially over Teton,
Togwotee, and Salt River Passes. The hazardous conditions could
impact the Friday morning and evening commutes.
* ADDITIONAL DETAILS...A brief lull in snowfall rates may occur
during the day Friday with the heaviest snowfall likely to arrive
Friday night through Saturday morning. Gusty winds of 20 to 30 mph
look to accompany the heavy snowfall which may create reduced
visibility and drifting snow.
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 .
&&
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
517 AM MST Thu Dec 4 2025
WYZ014-025-050330-
/O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/
Wind River Mountains West-Upper Green River Basin Foothills-
Including the cities of Pinedale
517 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 2 PM MST SATURDAY...
* WHAT...Snow expected. Total snow accumulations 6 to 9 inches
toward Bondurant/Hoback Junction; amounts of 2 to 4 inches near
Pinedale. Accumulations of 8 to 16 inches in the mountains. Winds
gusting as high as 45 mph over South Pass Friday night.
* WHERE...Wind River Mountains West and Upper Green River Basin
Foothills.
* WHEN...From 5 PM this afternoon to 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult through Hoback Junction.
The hazardous conditions could impact the Thursday evening and
Friday morning commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
TL
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
517 AM MST Thu Dec 4 2025
WYZ013-023-050330-
/O.CON.KRIW.WW.Y.0034.251205T0000Z-251206T2100Z/
Jackson Hole-Star Valley-
Including the cities of Jackson, Thayne, Alpine, Star Valley
Ranch, and Afton
517 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON TO 2 PM MST SATURDAY...
* WHAT...Snow expected. Total snow accumulations between 7 and 12
inches, with locally higher amounts up to 18 inches in the
foothill areas.
* WHERE...Jackson Hole and Star Valley.
* WHEN...From 5 PM this afternoon to 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Thursday evening and Friday morning commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
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 .
&&
$$
Winter Storm Watch
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
513 AM MST Thu Dec 4 2025
UTZ108-050315-
/O.CON.KSLC.WS.A.0006.251205T0900Z-251207T1200Z/
Wasatch Back-
Including the following locations - Huntsville, Heber City, and
Park City
513 AM MST Thu Dec 4 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
LATE SATURDAY NIGHT...
* WHAT...Heavy snow possible. Total snow accumulations between 6 and
12 inches across the Ogden Valley and Park City, and between 2 and
6 inches for the lower elevation portions of the Wasatch Back.
* WHERE...Wasatch Back.
* WHEN...From late tonight through late Saturday night.
* IMPACTS...Travel could be difficult at times. The hazardous
conditions could impact the Friday morning and evening commutes.
* ADDITIONAL DETAILS...The lowest snow levels will occur Friday
morning around 4000 feet and gradually rise to 6000 feet by
Saturday afternoon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
513 AM MST Thu Dec 4 2025
UTZ110>112-050315-
/O.CON.KSLC.WS.A.0006.251205T0900Z-251207T1200Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-
Including the following locations - Mirror Lake Highway, Mantua,
Alta, Moon Lake, Logan Summit, and Brighton
513 AM MST Thu Dec 4 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH
LATE SATURDAY NIGHT...
* WHAT...Heavy snow possible. Total snow accumulations between 1 to
2 feet, locally up to 30 inches, for the Bear River Range, Ogden
area mountains, and upper Cottonwoods. Total snow accumulations of
8 to 18 inches for the western Uintas.
* WHERE...The Wasatch Mountains, and Western Uinta Mountains.
* WHEN...From late tonight through late Saturday night.
* IMPACTS...Travel could be difficult at times. Traction law
restrictions may be enacted.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
For more information from the National Weather Service visit
https://weather.gov/saltlakecity.
For information on potential travel impacts visit
http://udottraffic.utah.gov
MT
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
1259 PM MST Wed Dec 3 2025
IDZ058>066-042000-
/O.CON.KPIH.WS.A.0006.251205T0000Z-251206T1200Z/
Marsh and Arbon Highlands-Franklin/Eastern Oneida Region-Bear
River Range-Bear Lake Valley-Blackfoot Mountains-Caribou Range-
Big Hole Mountains-Teton Valley-Centennial Mountains - Island
Park-
Including the cities of Kilgore, Malad, Preston, Bone,
Montpelier, Henry, Victor, Grace, Inkom, Driggs, Thatcher, Lava
Hot Springs, Georgetown, Swan Valley, Island Park, Ashton,
Emigration Summit, Downey, St. Charles, McCammon, Wayan, Tetonia,
and Soda Springs
1259 PM MST Wed Dec 3 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH LATE FRIDAY NIGHT...
* WHAT...Heavy snow possible. Total snow accumulations between 8 and
14 inches in the mountains and 4 to 8 inches in the valleys
possible. Winds could gust as high as 35 mph.
* WHERE...Big Hole Mountains, Centennial Mountains - Island Park,
Teton Valley, Bear Lake Valley, Bear River Range, Blackfoot
Mountains, Caribou Range, Franklin/Eastern Oneida Region, and
Marsh and Arbon Highlands.
* WHEN...From Thursday afternoon through late Friday night.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Friday morning and evening
commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the latest forecasts for updates on this situation.
&&
$$
Visit weather.gov/pocatello for more information.
GK
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
456 AM MST Thu Dec 4 2025
WYZ001>020-022>030-051600-
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-
456 AM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
2 PM MST SATURDAY...
...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON
TO 2 PM MST SATURDAY...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Periods of moderate to heavy snow begins late this afternoon and
evening and continues through the overnight hours across the Western
Mountains, Jackson and Star Valleys, and the northern portions of the
western Bighorns. Gusty winds combined with heavy snow could cause
reduced visibilities and hazardous travel.
Wind gusts of 20 to 35 mph are expected across the Wind Corridor,
the Absarokas, including the Cody area, and the upper Wind River
Basin through the afternoon. Isolated gusts of 50 mph are possible in
wind prone locations.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday through Saturday...Periods of snow throughout the day Friday,
with moderate to heavy snow beginning Friday evening and continuing
through Saturday morning across the Western Mountains and the
portions of the western Bighorns. Gusty 25 to 40 mph winds combined
with moderate to heavy snow could cause reduced visibilities and
hazardous travel.
Wind gusts of 30 to 40 mph late Friday night across southern
Wyoming, the Absarokas, northern Johnson County, and the Wind River
Basin through the afternoon. Isolated gusts over 55 mph are also
possible.
Sunday through Wednesday...Multiple chances for snow across the
western mountains and widespread breezy to gusty winds.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
Hazardous Weather Outlook
National Weather Service Grand Junction CO
249 AM MST Thu Dec 4 2025
COZ001>014-017>023-UTZ022>025-027>029-051200-
Lower Yampa River Basin-Central Yampa River Basin-
Roan and Tavaputs Plateaus-Elkhead and Park Mountains-
Upper Yampa River Basin-Grand Valley-Debeque to Silt Corridor-
Central Colorado River Basin-Grand and Battlement Mesas-
Gore and Elk Mountains/Central Mountain Valleys-
Central Gunnison and Uncompahgre River Basin-
West Elk and Sawatch Mountains-Flat Tops-Upper Gunnison River Valley-
Uncompahgre Plateau and Dallas Divide-Northwest San Juan Mountains-
Southwest San Juan Mountains-Paradox Valley/Lower Dolores River-
Four Corners/Upper Dolores River-Animas River Basin-
San Juan River Basin-Southeast Utah-Eastern Uinta Mountains-
Eastern Uinta Basin-Tavaputs Plateau-Arches/Grand Flat-
La Sal and Abajo Mountains-Canyonlands/Natural Bridges-
249 AM MST Thu Dec 4 2025
This Hazardous Weather Outlook is for northwest Colorado, southwest
Colorado, west central Colorado, east central Utah, northeast Utah
and southeast Utah.
.DAY ONE...Today and tonight.
Snow tapers off in most areas today before the next round arrives to
the northern Colorado mountains late this evening. Significant
amounts are mainly expected across the Park and Gore Ranges with
travel impacts along Highway 40 from Milner to Rabbit Ears Pass.
Light snow over Vail Pass could also lead to minor travel impacts at
times.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
The first round of snow will continue to impact the northern Colorado
mountains through Friday afternoon. A more robust round of snow and
wind will then impact the northern and more of the central mountains
of Colorado and adjacent valleys Friday night through early Sunday.
Significant accumulations are possible and travel impacts including
road closures should be planned for with this second storm. The
northern Colorado mountains are likely to see additional snow events
through much of the upcoming week as well.
.SPOTTER INFORMATION STATEMENT...
Spotter activation is not expected today or tonight, however
spotters are encouraged to report snowfall amounts to the
National Weather Service in Grand Junction.
$$
