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Home Return to list Winter Weather Advisory 0020 Issued by the Pocatello Forecast Office
Action: New Issued At: 2025-12-17 20:37:30 452 WWUS45 KPIH 180237 WSWPIH URGENT - WINTER WEATHER MESSAGE National Weather Service Pocatello ID 737 PM MST Wed Dec 17 2025 IDZ071>074-182200- /O.CON.KPIH.WS.W.0009.251218T1200Z-251220T1200Z/ Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region- Big Lost Highlands/Copper Basin- Including the cities of Sun Valley, Stanley, Clayton, Galena, Copper Basin, and Ketchum 737 PM MST Wed Dec 17 2025 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 AM THURSDAY TO 5 AM MST SATURDAY... * WHAT...Light to moderate valley snow and heavy mountain snow. Several inches of accumulation below 7,000 feet, including 5 to 8 inches in Stanley and Ketchum. One to two feet accumulation above 7,000 feet, including two feet on Galena Summit. Wind gusts as high as around 45 mph. * WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, Sawtooth/Stanley Basin, and Sun Valley Region. * WHEN...From 5 AM Thursday to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Thursday morning and evening commutes. Gusty winds could bring down tree branches. 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. && $$ IDZ060-063-064-066-182200- /O.NEW.KPIH.WW.Y.0020.251218T1800Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Wayan, Victor, Emigration Summit, Kilgore, Swan Valley, and Island Park 737 PM MST Wed Dec 17 2025 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 AM THURSDAY TO 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 5 and 9 inches below 7000 feet with around 10 to 14 inches above 7000 feet. Winds gusting as high as around 40 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...From 11 AM Thursday to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions. && $$ Visit weather.gov/pocatello for more information. Wyatt Action: Continued Issued At: 2025-12-18 14:11:51 617 WWUS45 KPIH 182011 WSWPIH URGENT - WINTER WEATHER MESSAGE National Weather Service Pocatello ID 111 PM MST Thu Dec 18 2025 IDZ071>074-191200- /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 Ketchum, Clayton, Copper Basin, Stanley, Galena, and Sun Valley 111 PM MST Thu Dec 18 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Light to moderate valley snow and heavy mountain snow. Several inches of accumulation below 7,000 feet, including 5 to 8 inches in Stanley and Ketchum. One to two feet accumulation above 7,000 feet, including two feet on Galena Summit. Wind gusts as high as around 45 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 to impossible. The hazardous conditions could impact the Thursday evening and Friday morning commutes. Gusty winds could bring down tree branches. 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. && $$ IDZ060-063-064-066-191200- /O.CON.KPIH.WW.Y.0020.000000T0000Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Island Park, Victor, Swan Valley, Wayan, Emigration Summit, and Kilgore 111 PM MST Thu Dec 18 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 5 and 9 inches below 7000 feet with around 10 to 14 inches above 7000 feet. Winds gusting as high as around 40 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Thursday evening and Friday morning commutes. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions. && $$ Visit weather.gov/pocatello for more information. McKaughan Action: Continued Issued At: 2025-12-19 06:55:40 071 WWUS45 KPIH 191255 WSWPIH 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. && $$ IDZ060-063-064-066-192200- /O.CON.KPIH.WW.Y.0020.000000T0000Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Kilgore, Island Park, Swan Valley, Emigration Summit, Wayan, and Victor 555 AM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow. Additional snow accumulations up to 7 inches. Winds gusting as high as 55 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday morning and evening commutes. Strong winds could cause tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions. && $$ Visit weather.gov/pocatello for more information. GK Action: Continued Issued At: 2025-12-19 14:13:23 571 WWUS45 KPIH 192013 WSWPIH URGENT - WINTER WEATHER MESSAGE National Weather Service Pocatello ID 113 PM MST Fri Dec 19 2025 IDZ071>074-201200- /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 Stanley, Sun Valley, Copper Basin, Galena, Ketchum, and Clayton 113 PM MST Fri Dec 19 2025 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Heavy snow. Additional snow accumulations up to 6 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...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute. 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. && $$ IDZ060-063-064-066-201200- /O.CON.KPIH.WW.Y.0020.000000T0000Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Island Park, Emigration Summit, Kilgore, Wayan, Swan Valley, and Victor 113 PM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow. Additional snow accumulations 3 to 8 inches, generally above 6500 ft. Winds gusting as high as 50 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Friday evening commute. Gusty winds could bring down tree branches. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions. && $$ Visit weather.gov/pocatello for more information. DMH Action: Continued Issued At: 2025-12-19 20:42:03 624 WWUS45 KPIH 200241 WSWPIH URGENT - WINTER WEATHER MESSAGE National Weather Service Pocatello ID 741 PM MST Fri Dec 19 2025 IDZ071>074-200345- /O.CAN.KPIH.WS.W.0009.000000T0000Z-251220T1200Z/ Frank Church Wilderness-Sawtooth/Stanley Basin-Sun Valley Region- Big Lost Highlands/Copper Basin- Including the cities of Ketchum, Clayton, Galena, Copper Basin, Sun Valley, and Stanley 741 PM MST Fri Dec 19 2025 ...WINTER STORM WARNING IS CANCELLED... Precipitation is predominantly south of the warned area with very little additional accumulation expected. $$ IDZ060-063-064-066-201200- /O.CON.KPIH.WW.Y.0020.000000T0000Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Island Park, Victor, Kilgore, Wayan, Emigration Summit, and Swan Valley 741 PM MST Fri Dec 19 2025 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... * WHAT...Snow. Additional snow accumulations up to 3 inches. Winds gusting as high as 45 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Bear River Range, and Caribou Range. * WHEN...Until 5 AM MST Saturday. * IMPACTS...Plan on slippery road conditions. Gusty winds could bring down tree branches. Blowing snow could result in reduced visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. Call 5 1 1 or visit 511.idaho.gov for the latest road conditions. && $$ Visit weather.gov/pocatello for more information. Cropp Action: Cancelled Issued At: 2025-12-20 02:24:11 319 WWUS45 KPIH 200823 WSWPIH URGENT - WINTER WEATHER MESSAGE National Weather Service Pocatello ID 123 AM MST Sat Dec 20 2025 IDZ060-063-064-066-200930- /O.CAN.KPIH.WW.Y.0020.000000T0000Z-251220T1200Z/ Bear River Range-Caribou Range-Big Hole Mountains-Centennial Mountains - Island Park- Including the cities of Island Park, Wayan, Victor, Kilgore, Swan Valley, and Emigration Summit 123 AM MST Sat Dec 20 2025 ...WINTER WEATHER ADVISORY IS CANCELLED... Significant snowfall is not expected the remainder of the morning. $$ Visit weather.gov/pocatello for more information. GK | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||