388
WWUS45 KPIH 211841
WSWPIH

URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
1241 PM MDT Tue Apr 21 2026

IDZ069-071>074-221200-
/O.CON.KPIH.WW.Y.0010.260422T0600Z-260423T1200Z/
Lost River Range-Frank Church Wilderness-Sawtooth/Stanley Basin-
Sun Valley Region-Big Lost Highlands/Copper Basin-
Including the cities of Stanley, Clayton, Copper Basin, Sun
Valley, Ketchum, Galena, and Borah Peak
1241 PM MDT Tue Apr 21 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO 6 AM MDT THURSDAY ABOVE 6500 FEET ELEVATION...

* WHAT...Snow expected ABOVE 6500 FEET ELEVATION. Total snow
  accumulations at those levels 5 to 9 inches. Winds gusting as high
  as 40 mph.

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

* WHEN...From midnight tonight to 6 AM MDT Thursday.

* IMPACTS...Plan on slippery road conditions. The hazardous
  conditions could impact the Wednesday morning and evening commutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.

&&

$$

IDZ060-063-064-066-221200-
/O.CON.KPIH.WW.Y.0010.260422T1800Z-260424T0600Z/
Bear River Range-Caribou Range-Big Hole Mountains-Centennial
Mountains - Island Park-
Including the cities of Wayan, Kilgore, Victor, Swan Valley,
Emigration Summit, and Island Park
1241 PM MDT Tue Apr 21 2026

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM NOON WEDNESDAY TO
MIDNIGHT MDT THURSDAY NIGHT ABOVE 6500 FEET ELEVATION...

* WHAT...Snow expected ABOVE 6500 FEET ELEVATION. Total snow
  accumulations at those levels between 5 and 10 inches. Winds
  gusting as high as 40 mph.

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

* WHEN...From noon Wednesday to midnight MDT Thursday Night.

* IMPACTS...Travel could be very difficult. The hazardous conditions
  could impact the Wednesday evening and Thursday morning commutes.

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