Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
253 AM MST Fri Dec 5 2025
IDZ058>066-052230-
/O.CON.KPIH.WS.W.0008.000000T0000Z-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 Thatcher, Grace, Victor, Driggs, Soda
Springs, Kilgore, Henry, Emigration Summit, Tetonia, Preston,
Downey, Georgetown, Malad, Lava Hot Springs, Bone, Swan Valley,
McCammon, Island Park, Ashton, St. Charles, Inkom, Wayan, and
Montpelier
253 AM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY...
* WHAT...Heavy snow expected at times. Total snow accumulations
through Friday night between 3 and 6 inches in the valleys and 10
to 18 inches in the mountains. A few locations above 8000 ft could
see higher amounts with snow rates approaching an inch per hour at
times. Very gusty winds developing late Friday into Friday night.
* 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 5 AM MST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Friday morning commute.
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.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1244 AM MST Fri Dec 5 2025
WYZ012-024-052300-
/O.CON.KRIW.WS.W.0012.000000T0000Z-251206T2100Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
1244 AM MST Fri Dec 5 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 2 PM MST SATURDAY...
* WHAT...Heavy snow expected. Additional snow accumulations of 10 to
20 inches with the highest elevations seeing 2 to 3 feet. Gusty
winds of 25 to 40 mph will be common. Higher elevations of the
Salt River and Wyoming Ranges could gust above 45 mph.
* WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming
Ranges.
* WHEN...Until 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult, especially over Teton,
Togwotee, and Salt River Passes. The hazardous conditions could
impact the Friday morning and evening commutes.
* ADDITIONAL DETAILS...Snow is expected to lighten in intensity
between 8AM and 2PM Friday, with accumulations generally between 1
and 5 inches. Moderate to heavy snowfall begins after 3PM Friday
and continues through the overnight hours, this is when a bulk of
the snow accumulations will occur. Gusty west winds of 25 to 40
mph, and possibly above 45 mph across higher elevations, occur
after sunset Friday and continue into Saturday morning. Heavy
snowfall and gusty winds could cause reduced visibility and
drifting snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
940 PM MST Thu Dec 4 2025
UTZ108-051945-
/O.CON.KSLC.WS.W.0007.251205T0600Z-251207T1200Z/
Wasatch Back-
Including the following locations - Heber City, Huntsville, and
Park City
940 PM MST Thu Dec 4 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow expected. Total snow accumulations between 6 to
16 inches above 5500 feet, 2 to 6 inches below 5500 feet.
* WHERE...Wasatch Back.
* WHEN...Until 5 AM MST Sunday.
* IMPACTS...Winter driving conditions can be expected on most
routes, especially those in the Park City area and during the
Friday morning and evening commutes.
* ADDITIONAL DETAILS...Two scenarios exist for this storm across the
Wasatch Back regarding precipitation type. If temperatures remain
near to below freezing through Friday evening below 5500 feet,
snow accumulations will be at the higher range. If temperatures
warm above freezing Friday morning, accumulations below 5500 feet
will shift toward the lower end of the range.
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.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
940 PM MST Thu Dec 4 2025
UTZ110-111-051945-
/O.CON.KSLC.WS.W.0007.000000T0000Z-251207T1200Z/
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Including the following locations - Alta, Logan Summit, Brighton,
and Mantua
940 PM MST Thu Dec 4 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow. Total snow accumulations between 1 and 3 feet,
with locally higher amounts possible in the Bear River Range and
upper Cottonwoods.
* WHERE...The Wasatch Mountains.
* WHEN...Until 5 AM MST Sunday.
* IMPACTS...Winter driving conditions can be expected on all
mountain routes. Traction restrictions are likely. Very low
visibility in blowing and drifting snow is likely near Logan
Summit.
* ADDITIONAL DETAILS...Snow will become heavy at times after 4 AM
Friday morning. The heaviest period of snow will be Friday evening
into Saturday morning, with rates exceeding 2 inches per hour at
times.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. For winter road conditions
from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
940 PM MST Thu Dec 4 2025
UTZ112-113-117-051945-
/O.CON.KSLC.WS.W.0007.251205T0600Z-251207T1200Z/
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-Central
Mountains-
Including the following locations - Indian Canyon, Scofield,
Mirror Lake Highway, Joes Valley, Cove Fort, Fish Lake, and Moon
Lake
940 PM MST Thu Dec 4 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SUNDAY...
* WHAT...Heavy snow expected. 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.
* ADDITIONAL DETAILS...Mountain snow will begin this tonight and
become heavy at times after 6 AM Friday morning. The heaviest
period of snow will be Friday evening into Saturday morning, with
rates exceeding 1 to 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.
&&
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1244 AM MST Fri Dec 5 2025
WYZ014-025-052300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Wind River Mountains West-Upper Green River Basin Foothills-
Including the cities of Pinedale
1244 AM MST Fri Dec 5 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST
SATURDAY...
* WHAT...Snow expected. Additional snow accumulations of 6 to 8
inches toward Bondurant/Hoback Junction; amounts of 2 to 4 inches
near Pinedale. Additional snow accumulations of 10 to 20 inches in
the mountains. Gusty winds of 20 to 35 mph across the Upper Green
River Basin and west Wind River Mountains, and up to 45 mph across
the highest elevations. Wind gusts as high as 45 mph over South
Pass Friday night.
* WHERE...Wind River Mountains West and Upper Green River Basin
Foothills.
* WHEN...Until 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Friday morning and evening commutes.
* ADDITIONAL DETAILS...Snow is expected to lighten in intensity
between 8AM and 2PM Friday, with accumulations generally between a
Trace and 3 inches. Moderate to heavy snowfall begins after 3PM
Friday and continues through the overnight hours, this is when a
bulk of the additional snow accumulations will occur. Gusty west
winds of 20 to 35 mph are expected after sunset Friday and
continue into Saturday morning. Heavy snowfall and gusty winds
could cause reduced visibility and drifting snow.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Gerhardt
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1244 AM MST Fri Dec 5 2025
WYZ013-023-052300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Jackson Hole-Star Valley-
Including the cities of Jackson, Afton, Thayne, Star Valley
Ranch, and Alpine
1244 AM MST Fri Dec 5 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST
SATURDAY...
* WHAT...Snow expected. Additional snow accumulations of 4 to 8
inches, with locally higher amounts of 9 to 14 inches in the
foothill areas. Gusty winds of 20 to 25 mph.
* WHERE...Jackson Hole and Star Valley.
* WHEN...Until 2 PM MST Saturday.
* IMPACTS...Travel could be very difficult. The hazardous conditions
could impact the Friday morning and evening commutes.
* ADDITIONAL DETAILS...Snow is expected to lighten in intensity
between 8AM and 2PM Friday, with accumulations generally between 1
and 3 inches. Moderate to heavy snowfall begins after 3PM Friday
and continues through the overnight hours, this is when a bulk of
the additional snow accumulations will occur. Gusty west winds of
20 to 25 mph are expected after sunset Friday and continue into
Saturday morning. Heavy snowfall and gusty winds could cause
reduced visibility and drifting snow.
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 .
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
940 PM MST Thu Dec 4 2025
UTZ103-107-051800-
/O.CON.KSLC.WW.Y.0026.251205T0600Z-251205T1800Z/
Eastern Box Elder County-Cache Valley/Utah Portion-
Including the following locations - Brigham City, Smithfield,
Snowville, and Logan
940 PM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...
* WHAT...Snow expected. Total snow accumulations up to two inches
valley floors, 2 to 6 inches benches.
* WHERE...Cache Valley/Utah Portion and Eastern Box Elder County.
* WHEN...Until 11 AM MST Friday.
* IMPACTS...Winter driving conditions are expected and will impact
the Friday morning commute.
* ADDITIONAL DETAILS...Two scenarios exist for this storm across the
Cache Valley and eastern Box Elder County regarding precipitation
type. If temperatures remain near to below freezing through Friday
evening, snow accumulations will be at the higher range. If
temperatures warm above freezing Friday morning, accumulations
will shift toward the lower end of the range.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For winter road
conditions from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
940 PM MST Thu Dec 4 2025
UTZ109-WYZ021-051945-
/O.CON.KSLC.WW.Y.0027.251206T0000Z-251207T0000Z/
Bear Lake and Bear River Valley-Southwest Wyoming-
Including the following locations - Randolph, Evanston, Woodruff,
Lyman, and Garden City
940 PM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM FRIDAY TO 5
PM MST SATURDAY...
* WHAT...Snow expected. 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...From 5 PM Friday to 5 PM MST Saturday.
* IMPACTS...Winter driving conditions are expected. Blowing and
drifting snow will reduce visibility, including 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.
$$
