Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
158 AM MST Sat Dec 6 2025
IDZ058>066-061800-
/O.EXT.KPIH.WS.W.0008.000000T0000Z-251206T1800Z/
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 Grace, Ashton, Lava Hot Springs, Tetonia,
Montpelier, McCammon, Thatcher, St. Charles, Malad, Kilgore,
Bone, Swan Valley, Inkom, Preston, Downey, Soda Springs, Island
Park, Wayan, Georgetown, Henry, Driggs, Victor, and Emigration
Summit
158 AM MST Sat Dec 6 2025
...WINTER STORM WARNING NOW IN EFFECT UNTIL 11 AM MST THIS MORNING...
* WHAT...Heavy snow generally above valley floors. Additional snow
accumulations of 6 to 10 inches above 6500 ft elevation. The Bear
River and Caribou Ranges could see additional accumulations of 12
to 18 inches. Very gusty winds overnight may cause areas of
blowing and drifting snowfall.
* 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...Until 11 AM MST this morning.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact Saturday morning travel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1251 AM MST Sat Dec 6 2025
WYZ012-024-062100-
/O.CON.KRIW.WS.W.0012.000000T0000Z-251206T2100Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
1251 AM MST Sat Dec 6 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON...
* WHAT...Heavy snow. Additional snow accumulations of 5 to 12
inches, with higher elevations seeing an additional 15 to 20
inches. Gusty winds of 30 to 45 mph will be common. Gusts of 60
mph are possible across the highest elevations.
* WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming
Ranges.
* WHEN...Until 2 PM MST this afternoon.
* IMPACTS...Travel could be very difficult, especially over Teton,
Togwotee, and Salt River Passes. The hazardous conditions could
impact travel through midday Saturday.
* ADDITIONAL DETAILS...Periods of moderate to heavy snow are
possible through Noon Saturday. Snow and gusty winds could cause
reduced visibilities and drifting snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
941 PM MST Fri Dec 5 2025
UTZ108-061945-
/O.CON.KSLC.WS.W.0007.000000T0000Z-251207T1200Z/
Wasatch Back-
Including the following locations - Park City, Heber City, and
Huntsville
941 PM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow. Total snow accumulations between 6 to 12 inches
above 5500 feet and 2 to 6 inches below 5500 feet.
* WHERE...Wasatch Back.
* WHEN...Until 5 AM MST Sunday.
* IMPACTS...Winter driving conditions are expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. For winter road conditions
from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
941 PM MST Fri Dec 5 2025
UTZ110-111-061945-
/O.CON.KSLC.WS.W.0007.000000T0000Z-251207T1200Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the following locations - Logan Summit, Mantua,
Brighton, and Alta
941 PM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow. Total snow accumulations between 12 and 30
inches.
* WHERE...The Wasatch Mountains.
* WHEN...Until 5 AM MST Sunday.
* IMPACTS...Winter driving conditions can be expected on all
mountain routes. Traction restrictions are likely. Very low
visibility in blowing and drifting snow is likely near Logan
Summit.
* ADDITIONAL DETAILS...The heaviest period of snow will be Friday
evening into early Saturday morning, with rates exceeding 2 inches
per hour at times.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. For winter road conditions
from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
941 PM MST Fri Dec 5 2025
UTZ112-113-117-061945-
/O.CON.KSLC.WS.W.0007.000000T0000Z-251207T1200Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-Central
Mountains-
Including the following locations - Mirror Lake Highway,
Scofield, Cove Fort, Joes Valley, Fish Lake, Moon Lake, and
Indian Canyon
941 PM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow. Total snow accumulations of 1 to 2 feet, except
4 to 8 inches south of Manti.
* WHERE...Central Mountains, Wasatch Plateau/Book Cliffs, and
Western Uinta Mountains.
* WHEN...Until 5 AM MST Sunday.
* IMPACTS...Winter driving conditions can be expected on all
mountain routes with significant impacts to conditions on Soldier
Summit.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. For winter road conditions
from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1251 AM MST Sat Dec 6 2025
WYZ014-025-062100-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Wind River Mountains West-Upper Green River Basin Foothills-
Including the cities of Pinedale
1251 AM MST Sat Dec 6 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON...
* WHAT...Snow expected. Additional snow accumulations of 1 to 4
inches from Bondurant/Hoback Junction to Pinedale and 8 to 15
inches in the mountains. Gusty winds of 20 to 35 mph possible
across the Upper Green River Basin and west Wind River Mountains,
and up to 50 mph across the highest elevations. Wind gusts around
45 mph over South Pass.
* WHERE...Wind River Mountains West and Upper Green River Basin
Foothills.
* WHEN...Until 2 PM MST this afternoon.
* IMPACTS...Travel could be difficult through Noon Saturday,
especially near Bondurant/Hoback Junction.
* ADDITIONAL DETAILS...Periods of moderate to heavy snow are
possible through Saturday morning. Snow and gusty winds could
cause reduced visibilities.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Gerhardt
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1251 AM MST Sat Dec 6 2025
WYZ013-023-062100-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Jackson Hole-Star Valley-
Including the cities of Jackson, Afton, Alpine, Thayne, and Star
Valley Ranch
1251 AM MST Sat Dec 6 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON...
* WHAT...Snow expected. Additional snow accumulations of 1 to 4
inches possible, with locally high amounts up to 6 inches in the
foothill areas. Gusty winds of 20 to 25 mph.
* WHERE...Jackson Hole and Star Valley.
* WHEN...Until 2 PM MST this afternoon.
* IMPACTS...Plan on slippery road conditions and reduced
visibilities.
* ADDITIONAL DETAILS...Periods of moderate to heavy snow are
possible through Saturday morning. Snow and gusty winds could
cause reduced visibilities.
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 .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
941 PM MST Fri Dec 5 2025
UTZ109-WYZ021-061945-
/O.CON.KSLC.WW.Y.0027.000000T0000Z-251207T0000Z/
Bear Lake and Bear River Valley-Southwest Wyoming-
Including the following locations - Garden City, Evanston,
Randolph, Lyman, and Woodruff
941 PM MST Fri Dec 5 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST
SATURDAY...
* WHAT...Snow. Total snow accumulations of 2 to 5 inches. Winds
gusting as high as 55 mph mainly Uinta County, Wyoming.
* WHERE...In Utah, Bear Lake and Bear River Valley. In Wyoming,
Southwest Wyoming.
* WHEN...Until 5 PM MST Saturday.
* IMPACTS...Winter driving conditions are expected. Blowing and
drifting snow will reduce visibility, including along I-80 in
Uinta County, WY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. In Utah, for winter road
conditions from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
In Wyoming, for winter road conditions from the Wyoming Department
of Transportation, visit http://www.wyoroad.info or dial 511.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
For more information from the National Weather Service visit
https://weather.gov/saltlakecity.
For information on potential travel impacts visit
http://udottraffic.utah.gov
LC
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Grand Junction CO
337 AM MST Fri Dec 5 2025
COZ001>014-017>023-UTZ022>025-027>029-061045-
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-
337 AM MST Fri Dec 5 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 today.
A more robust round of snow and wind will then impact the northern
and more of the central mountains of Colorado and adjacent valleys
beginning tonight
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Moderate to heavy snow showers continue through the northern and
central Colorado mountains and adjacent valleys Saturday through
early Sunday. Plan for significant snow accumulations with travel
impacts including road closures likely with this winter storm. The
northern Colorado mountains are likely to see additional periods of
light to moderate snow showers through the upcoming work week.
.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.
$$
Hazardous Weather Outlook...CORRECTED
National Weather Service Riverton WY
254 AM MST Fri Dec 5 2025
WYZ001>020-022>030-061400-
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-
254 AM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT FOR THE TETON AND GROS
VENTRE MOUNTAINS AND THE SALT RIVER AND WYOMING RANGES UNTIL 2 PM
MST SATURDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR YELLOWSTONE NATIONAL
PARK AND THE ABSAROKA MOUNTAINS UNTIL 2 PM MST SATURDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR THE BIGHORN MOUNTAINS
WEST UNTIL 2 PM MST SATURDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR THE UPPER GREEN RIVER
BASIN FOOTHILLS AND WIND RIVER MOUNTAINS WEST UNTIL 2 PM MST SATURDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FOR JACKSON HOLE AND
STAR VALLEY UNTIL 2 PM MST SATURDAY...
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and tonight.
Moderate to heavy snow this afternoon through the overnight hours
across the Western Mountains, Jackson and Star Valleys, the Upper
Green River Basin, and the northern portions of the western Bighorns.
Gusty winds combined with heavy snow could cause reduced
visibilities and hazardous travel.
Widespread breezy to gusty winds across much of the area this
afternoon, with gusts up to 30 mph across the Wind Corridor, the
Absarokas, and eastern Wind River Mountains.
Wind gusts of 40 to 50 mph are expected after sunset across the
western mountains, the Wind Corridor, and the Wind River Basin.
.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
Saturday...Light snow across western Wyoming and the western
Bighorns. Gusty across the area. Wind gusts of 40 to 50 mph across
the western mountains, northern Johnson County, the Wind River Basin,
and southern Wyoming. Gusts of 60 mph are possible in wind prone
locations, especially Sweetwater County.
Sunday through Thursday...Multiple chances for snow across western
Wyoming and widespread breezy to gusty winds.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
