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Winter Weather Advisory

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
253 AM MST Fri Dec 5 2025

IDZ072-073-052230-
/O.CON.KPIH.WW.Y.0019.000000T0000Z-251206T1200Z/
Sawtooth/Stanley Basin-Sun Valley Region-
Including the cities of Sun Valley, Ketchum, Galena, and Stanley
253 AM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 6
  inches with higher snow totals expected at and above pass level
  with 7 to 10 inches of snow for Galena Summit. Very gusty winds
  developing late Friday into Friday night.

* WHERE...Sawtooth/Stanley Basin and Sun Valley Region.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the Friday commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.

&&

$$

Visit weather.gov/pocatello for more information.

Messick
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
253 AM MST Fri Dec 5 2025

IDZ053-052230-
/O.CON.KPIH.WW.Y.0019.000000T0000Z-251206T1200Z/
Upper Snake River Plain-
Including the cities of St. Anthony, Idaho Falls, and Rexburg
253 AM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST
SATURDAY...

* WHAT...Snow expected. Total snow accumulations between 2 and 6
  inches with totals closer to the higher end of that range from
  Rexburg northward. Very gusty winds developing late Friday into
  Friday night.

* WHERE...Upper Snake River Plain.

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Friday commute.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.

&&

$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
1108 AM MST Fri Dec 5 2025

MTZ007-060600-
/O.CON.KMSO.WW.Y.0046.000000T0000Z-251206T0600Z/
Butte/Blackfoot Region-
1108 AM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow expected. There is a likelihood of moderate winter
  weather impacts. Total snow accumulations up to 6 inches.

* WHERE...Highway 12 Garrison to Elliston, Georgetown Lake, Butte,
  MacDonald Pass, and Homestake Pass.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...For MODERATE winter weather impacts, expect disruptions
  to normal activities. Hazardous traveling conditions. Use extra
  caution while driving. Closures and disruptions to infrastructure
  may occur. The hazardous conditions could impact the Friday
  evening commute, especially over higher passes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

&&

$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
1059 AM MST Fri Dec 5 2025

UTZ109-WYZ021-060900-
/O.CON.KSLC.WW.Y.0027.251206T0000Z-251207T0000Z/
Bear Lake and Bear River Valley-Southwest Wyoming-
Including the following locations - Garden City, Woodruff, Lyman,
Evanston, and Randolph
1059 AM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
AFTERNOON 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 this afternoon 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

Webber
URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
421 AM MST Fri Dec 5 2025

IDZ011-013-052200-
/O.CON.KBOI.WW.Y.0011.000000T0000Z-251206T0600Z/
West Central Mountains-Boise Mountains-
Including the cities of Big Creek, McCall, Prairie, Pine, Bear,
Cuprum, Warm Lake, Cascade, Ola, and Anderson Dam
421 AM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...

* WHAT...Snow. Additional snow accumulations of up to 3 inches in
  mountain valleys before mixing with or changing to rain this
  afternoon. An additional 4 to 8 inches in the mountains above 6000
  feet. Wind gusts of 30 to 40 mph develop later this evening over
  higher mountains.

* WHERE...Boise Mountains and West Central Mountains.

* WHEN...Until 11 PM MST this evening.

* IMPACTS...Travel could be difficult, especially over higher
  elevation passes. Locally heavy snowfall will limit visibilities.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

&&

$$
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 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

WYZ001-002-052300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Old Faithful, Mammoth, and Lake
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; accumulations of 10 to 15 inches at the South and
  Northeast entrances and near Pahaska; locally higher amounts of 20
  to 25 inches in the higher elevations in the Pitchstone Plateau
  and the western slopes of the Absarokas. Gusty winds of 20 to 35
  mph across Yellowstone National Park and 30 to 50 mph across the
  Absaroka Mountains.

* WHERE...Absaroka Mountains and Yellowstone National Park.

* 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 4 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 winds 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 .

&&

$$
U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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