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Winter Storm Warning 0010
Issued by the Pocatello Forecast Office

Action Issued Starts Expiration
New 2025-12-20 14:36:24 2025-12-21 03:00:00 2025-12-22 12:00:00
Continued 2025-12-21 05:00:36 2025-12-22 12:00:00
Continued 2025-12-21 14:14:10 2025-12-22 12:00:00
Continued 2025-12-22 03:24:32 2025-12-22 12:00:00
Expired 2025-12-22 11:35:33 2025-12-22 12:00:00


Action: New
Issued At: 2025-12-20 14:36:24

977 
WWUS45 KPIH 202036
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
136 PM MST Sat Dec 20 2025

IDZ071>074-211100-
/O.NEW.KPIH.WS.W.0010.251221T0900Z-251222T1800Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Sun Valley, Stanley, Ketchum, Galena,
Clayton, and Copper Basin
136 PM MST Sat Dec 20 2025

...WINTER STORM WARNING IN EFFECT FROM 2 AM SUNDAY TO 11 AM MST 
MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations 3 to 6 inches 
  at valley floors and 8 to 18 inches above 7000 ft.

* WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, 
  Sawtooth/Stanley Basin, and Sun Valley Region.

* WHEN...From 2 AM Sunday to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the Monday 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.

&&

$$

IDZ060-064-066-211100-
/O.NEW.KPIH.WW.Y.0021.251221T0900Z-251222T1800Z/
Bear River Range-Big Hole Mountains-Centennial Mountains - Island
Park-
Including the cities of Island Park, Emigration Summit, Kilgore,
and Victor
136 PM MST Sat Dec 20 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM SUNDAY TO 11 AM MST 
MONDAY...

* WHAT...Snow expected. Total snow accumulations 6 to 12 inches 
  above 6500 feet.

* WHERE...Big Hole Mountains, Centennial Mountains - Island Park, 
  and Bear River Range.

* WHEN...From 2 AM Sunday to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning 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.

&&

$$

IDZ075-211100-
/O.NEW.KPIH.WW.Y.0021.251221T0900Z-251222T1800Z/
Wood River Foothills-
Including the cities of Bellevue, Picabo, and Hailey
136 PM MST Sat Dec 20 2025

...WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM SUNDAY TO 11 AM MST 
MONDAY...

* WHAT...Snow expected. Total snow accumulations 3 to 7 inches above 
  6500 feet.

* WHERE...Wood River Foothills.

* WHEN...From 2 AM Sunday to 11 AM MST Monday.

* IMPACTS...Travel could be very difficult. The hazardous conditions 
  could impact the Monday morning 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.

DMH


Action: Continued
Issued At: 2025-12-21 05:00:36

067 
WWUS45 KPIH 211100
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
400 AM MST Sun Dec 21 2025

IDZ071>074-212200-
/O.CON.KPIH.WS.W.0010.000000T0000Z-251222T1800Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Galena, Copper Basin, Ketchum, Sun
Valley, Stanley, and Clayton
400 AM MST Sun Dec 21 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST MONDAY...

* WHAT...Heavy snow. Total snow accumulations 2 to 6 inches at 
  valley floors and 8 to 18 inches above 7000 ft,

* WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, 
  Sawtooth/Stanley Basin, and Sun Valley Region.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Travel could be very difficult to impossible. The 
  hazardous conditions could impact the Monday 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.

&&

$$

IDZ060-064-066-212200-
/O.CON.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Bear River Range-Big Hole Mountains-Centennial Mountains - Island
Park-
Including the cities of Kilgore, Emigration Summit, Island Park,
and Victor
400 AM MST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
MONDAY...

* WHAT...Snow. Total snow accumulations 4 to 10 inches above 6500 
  feet.

* WHERE...Big Hole Mountains, Centennial Mountains - Island Park, 
  and Bear River Range.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning 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.

&&

$$

IDZ075-212200-
/O.CON.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Wood River Foothills-
Including the cities of Hailey, Picabo, and Bellevue
400 AM MST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
MONDAY...

* WHAT...Snow. Additional snow accumulations 2 to 6 inches.

* WHERE...Wood River Foothills.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning 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.

GK


Action: Continued
Issued At: 2025-12-21 14:14:10

886 
WWUS45 KPIH 212013
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
113 PM MST Sun Dec 21 2025

IDZ071>074-221100-
/O.CON.KPIH.WS.W.0010.000000T0000Z-251222T1800Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Clayton, Copper Basin, Galena, Sun
Valley, Stanley, and Ketchum
113 PM MST Sun Dec 21 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST MONDAY...

* WHAT...Heavy snow. Total snow accumulations 2 to 6 inches at 
  valley floors and 8 to 18 inches above 7000 ft,

* WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, 
  Sawtooth/Stanley Basin, and Sun Valley Region.

* WHEN...Until 11 AM MST Monday.

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

&&

$$

IDZ060-064-066-221100-
/O.CON.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Bear River Range-Big Hole Mountains-Centennial Mountains - Island
Park-
Including the cities of Kilgore, Emigration Summit, Victor, and
Island Park
113 PM MST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
MONDAY...

* WHAT...Snow. Total snow accumulations 4 to 10 inches above 6500 
  feet.

* WHERE...Big Hole Mountains, Centennial Mountains - Island Park, 
  and Bear River Range.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning 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.

&&

$$

IDZ075-221100-
/O.CON.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Wood River Foothills-
Including the cities of Hailey, Bellevue, and Picabo
113 PM MST Sun Dec 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST 
MONDAY...

* WHAT...Snow. Total snow accumulations 2 to 6 inches.

* WHERE...Wood River Foothills.

* WHEN...Until 11 AM MST Monday.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning 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.

DMH


Action: Continued
Issued At: 2025-12-22 03:24:32

977 
WWUS45 KPIH 220924
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
224 AM MST Mon Dec 22 2025

IDZ075-221030-
/O.CAN.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Wood River Foothills-
Including the cities of Hailey, Bellevue, and Picabo
224 AM MST Mon Dec 22 2025

...WINTER WEATHER ADVISORY IS CANCELLED FOR THE WOOD RIVER 
FOOTHILLS...

Snow has changed to rain, with one half inch or less of additional 
accumulation expected today for area highways and lower elevation 
population areas.

$$

IDZ071>074-221800-
/O.CON.KPIH.WS.W.0010.000000T0000Z-251222T1800Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Clayton, Stanley, Ketchum, Copper Basin,
Galena, and Sun Valley
224 AM MST Mon Dec 22 2025

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS 
MORNING...

* WHAT...Moderate snow. Additional snow accumulations of 1 to 5 
  inches. Winds gusting as high as 35 MPH.

* WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, 
  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 the 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.

&&

$$

IDZ060-064-066-221800-
/O.CON.KPIH.WW.Y.0021.000000T0000Z-251222T1800Z/
Bear River Range-Big Hole Mountains-Centennial Mountains - Island
Park-
Including the cities of Island Park, Kilgore, Victor, and
Emigration Summit
224 AM MST Mon Dec 22 2025

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

* WHAT...A mix of rain and snow. Additional snow accumulations up to 
  2 inches. Winds gusting as high as 35 MPH.

* WHERE...Big Hole Mountains, Centennial Mountains - Island Park, 
  and Bear River Range.

* WHEN...Until 11 AM MST this morning.

* IMPACTS...Plan on slippery road conditions. The hazardous 
  conditions could impact the Monday morning 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.

KSmith


Action: Expired
Issued At: 2025-12-22 11:35:33

242 
WWUS45 KPIH 221735
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
1035 AM MST Mon Dec 22 2025

IDZ071>074-221845-
/O.EXP.KPIH.WS.W.0010.000000T0000Z-251222T1800Z/
Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region-
Big Lost Highlands/Copper Basin-
Including the cities of Stanley, Sun Valley, Clayton, Copper
Basin, Galena, and Ketchum
1035 AM MST Mon Dec 22 2025

...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING...

Moderate to heavy accumulation of snow have ended. Light snow will 
accumulate overnight and Tuesday morning at elevations above 6000 
feet.

$$

IDZ060-064-066-230600-
/O.EXT.KPIH.WW.Y.0021.000000T0000Z-251223T0600Z/
Bear River Range-Big Hole Mountains-Centennial Mountains - Island
Park-
Including the cities of Victor, Kilgore, Island Park, and
Emigration Summit
1035 AM MST Mon Dec 22 2025

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

* WHAT...Snow. Additional snow accumulations up to 4 inches, Mainly 
  in the passes in areas north of Palisades Reservoir, in the Big 
  Hole and Island Park region. Winds gusting as high as 35 mph.

* WHERE...Big Hole Mountains, Centennial Mountains - Island Park, 
  and Bear River Range.

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

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



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