674
WWUS45 KPIH 060858
WSWPIH

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.

&&

$$

IDZ072-073-061800-
/O.EXT.KPIH.WW.Y.0019.000000T0000Z-251206T1800Z/
Sawtooth/Stanley Basin-Sun Valley Region-
Including the cities of Ketchum, Stanley, Sun Valley, and Galena
158 AM MST Sat Dec 6 2025

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 AM MST THIS
MORNING...

* 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 11 AM MST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact Saturday morning travel.

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