Hazard Report Provided By forecast.weather.gov

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
555 AM MST Fri Dec 19 2025

IDZ071>074-192200-
/O.CON.KPIH.WS.W.0009.000000T0000Z-251220T1200Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Copper Basin, Ketchum, Stanley, Sun
Valley, Galena, and Clayton
555 AM MST Fri Dec 19 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY...

* WHAT...Heavy snow. Additional snow accumulations between 6 and 12
  inches. Winds gusting as high as 55 mph.

* WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness,
  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 morning and evening commutes. Strong winds
  could cause tree damage.

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>074-201000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
BACKCOUNTRY AVALANCHE WARNING
Forest Service Sawtooth Avalanche Center Ketchum ID
Relayed by National Weather Service Pocatello ID
634 AM MST Fri Dec 19 2025

...The Forest Service Sawtooth Avalanche Center in Ketchum has
ISSUED an AVALANCHE WARNING which is in effect until 3 AM MST
Saturday...

* WHAT...Avalanche warning. The avalanche danger is HIGH. Heavy
  snowfall and wind driven snow are overloading a weak snowpack.

* WHERE...The Sawtooths, White Clouds, Smokys, Boulders, and
  Pioneers, including the mountains near Stanley, Smiley Creek,
  Galena Summit, and Trail Creek Summit.

* WHEN...7 AM MST Friday until 3 AM MST Saturday.

* IMPACTS...Natural and human triggered avalanches large enough to
  bury people, snap trees, or destroy structures are very likely
  to occur. Avalanches may strike roadways, trails, and buildings
  in valley bottoms.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Very dangerous avalanche conditions exist. Travel in avalanche
terrain is not recommended. Stay off and out from below steep
slopes, slopes steeper than about 30 degrees. Avalanches may be
triggered remotely, from flat terrain above, below, and to the
sides of steep slopes.

Consult www.sawtoothavalanche.com or www.avalanche.org for more
detailed information.

Similar avalanche danger may exist at locations outside the
coverage area of this or any avalanche center.

$$

Hazard Report Provided By forecast.weather.gov