WWA Summary for Winter Weather Advisory Issued by PIH

Winter Weather Advisory

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
143 PM MST Fri Dec 5 2025

IDZ072-073-061200-
/O.CON.KPIH.WW.Y.0019.000000T0000Z-251206T1200Z/
Sawtooth/Stanley Basin-Sun Valley Region-
Including the cities of Galena, Stanley, Sun Valley, and Ketchum
143 PM MST Fri Dec 5 2025

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

* WHAT...Snow expected. Additional snow accumulations between 2 and
  6 inches with higher snow totals expected at and above pass level
  with 6 to 10 inches of snow for Galena Summit. Gusty winds are
  possible, with areas of blowing and drifting snow.

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

* WHEN...Until 5 AM MST Saturday.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Friday evening commute. Gusty winds could bring
  down tree branches.

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.

DMH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
1031 PM MST Fri Dec 5 2025

IDZ011-013-060645-
/O.EXP.KBOI.WW.Y.0011.000000T0000Z-251206T0600Z/
West Central Mountains-Boise Mountains-
Including the cities of Bear, McCall, Prairie, Big Creek, Pine,
Cuprum, Cascade, Ola, Anderson Dam, and Warm Lake
1031 PM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 PM MST THIS EVENING...

A few snow showers remain this evening but will produce little to no
additional snowfall so the advisory will be allowed to expire.

$$

JDS

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

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
402 PM MST Fri Dec 5 2025

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

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

* WHAT...Snow. There is a likelihood of developing or ongoing
  moderate to isolated major winter weather impacts. Additional snow
  accumulations of 2 to 6 inches. Winds gusting as high as 40 mph.

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

* 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. For MAJOR winter weather impacts, expect considerable
  disruptions to normal activities. Dangerous or impossible
  traveling conditions. Avoid travel in the impacted areas if
  possible. Widespread closures and disruptions to infrastructure
  may occur. The hazardous conditions could impact the Friday
  evening commute, especially over higher passes.

* ADDITIONAL DETAILS...Rapidly changing conditions are expected
  through the evening with periods of heavy snow.

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
1253 PM MST Fri Dec 5 2025

WYZ001-002-061300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Yellowstone National Park-Absaroka Mountains-
Including the cities of Lake, Old Faithful, and Mammoth
1253 PM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST
SATURDAY...

* WHAT...Snow expected. Additional snow accumulations of 2 to 6
  inches; accumulations of 10 to 15 inches at the South and
  Northeast entrances and near Pahaska; locally higher amounts of
  one to two feet 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 any travel through the area.

* ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday
  evening 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 .

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1253 PM MST Fri Dec 5 2025

WYZ013-023-061300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Jackson Hole-Star Valley-
Including the cities of Thayne, Star Valley Ranch, Alpine, Afton,
and Jackson
1253 PM MST Fri Dec 5 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST
SATURDAY...

* WHAT...Snow expected. Additional snow accumulations of 2 to 6
  inches, with locally higher amounts of 6 to 12 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 difficult. The hazardous conditions
  could impact the Friday evening commute.

* ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday
  evening 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
1253 PM MST Fri Dec 5 2025

WYZ014-025-061300-
/O.CON.KRIW.WW.Y.0034.000000T0000Z-251206T2100Z/
Wind River Mountains West-Upper Green River Basin Foothills-
Including the cities of Pinedale
1253 PM 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 toward Bondurant/Hoback Junction; amounts of 2 to 6 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 evening commutes.

* ADDITIONAL DETAILS...Moderate to heavy snowfall begins Friday
  evening 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/ .

Dziewaltowski