WWA Summary for All Issued by LKN

Winter Storm Warning

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.

&&

$$

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
351 PM MST Thu Dec 4 2025

IDZ058>066-051130-
/O.CON.KPIH.WS.W.0008.251205T0000Z-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 Wayan, Georgetown, Driggs, Grace, Downey,
Tetonia, Preston, Kilgore, Emigration Summit, Soda Springs,
Victor, Island Park, Thatcher, Montpelier, Swan Valley, Lava Hot
Springs, St. Charles, Inkom, Ashton, Bone, Malad, McCammon, and
Henry
351 PM MST Thu Dec 4 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.

&&

$$

Winter Weather Advisory

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

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
141 PM MST Thu Dec 4 2025

IDZ011-013-051000-
/O.NEW.KBOI.WW.Y.0011.251205T0000Z-251206T0600Z/
West Central Mountains-Boise Mountains-
Including the cities of Big Creek, Ola, Cuprum, Anderson Dam,
Prairie, McCall, Pine, Bear, Cascade, and Warm Lake
141 PM MST Thu Dec 4 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11
PM MST FRIDAY...

* WHAT...Snow expected. Total snow accumulation 1-5 inches below
  5000 feet, 4-8 above 5000 feet, with up to 8-12 inches in high
  elevation passes and summits. Snow levels rise Friday, mountain
  towns could see a switch from snow to rain. Gusts increase to
  20-30 mph Friday night.

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

* WHEN...From 5 PM this afternoon to 11 PM MST Friday.

* IMPACTS...Roads, and especially bridges and overpasses, will
  likely become slick and hazardous. Travel could be very difficult
  to impossible. 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.

&&

$$

JM