479
WWUS45 KMSO 280016
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
616 PM MDT SAT JUN 27 2026
IDZ009-280830-
/O.CON.KMSO.WS.W.0004.000000T0000Z-260629T1500Z/
WESTERN LEMHI COUNTY-
616 PM MDT SAT JUN 27 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY ABOVE
6500 FEET...
* WHAT...HEAVY WET SNOW EXPECTED ABOVE 6500 FEET. TOTAL SNOW
ACCUMULATIONS OF 4 TO 8 INCHES, WITH UP TO 12 INCHES ACROSS THE
HIGHEST PEAKS.
* WHERE...BACKCOUNTRY AND HIGHER ELEVATION AREAS, INCLUDING WILLIAMS
CREEK SUMMIT.
* WHEN...UNTIL 9 AM MDT MONDAY.
* IMPACTS...PLAN FOR WINTER-LIKE CONDITIONS IN THE BACKCOUNTRY AND
HIGHER ELEVATIONS. COLD TEMPERATURES, WIND, AND WET SNOW WILL
ELEVATE THE RISK OF HYPOTHERMIA. HEAVY WET SNOW MAY DOWN TREES,
BLOCKING ACCESS TO BACKCOUNTRY ROADWAYS.
* ADDITIONAL DETAILS...WEST WINDS 10 TO 20 MPH WITH GUSTS UP TO 30
MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD CONSIDER DELAYING TRAVEL ACROSS THE BACKCOUNTRY AND
HIGHER ELEVATIONS. IF TRAVEL IS ABSOLUTELY NECESSARY, CONSIDER TAKING
A WINTER STORM KIT ALONG WITH YOU, INCLUDING SUCH ITEMS AS TIRE
CHAINS, BOOSTER CABLES, FLASHLIGHT, SHOVEL, BLANKETS AND EXTRA
CLOTHING. ALSO TAKE WATER, A FIRST AID KIT, AND ANYTHING ELSE THAT
WOULD HELP YOU SURVIVE IN CASE YOU BECOME STRANDED.
IDZ010-280830-
/O.CON.KMSO.WS.W.0004.000000T0000Z-260629T1500Z/
EASTERN LEMHI COUNTY-
616 PM MDT SAT JUN 27 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY ABOVE
6500 FEET...
* WHAT...HEAVY WET SNOW POSSIBLE ABOVE 6500 FEET. TOTAL SNOW
ACCUMULATIONS OF 4 TO 8 INCHES, WITH UP TO 12 INCHES ACROSS THE
HIGHEST PEAKS.
* WHERE...BACKCOUNTRY AND HIGHER ELEVATION AREAS, HIGHWAY 28 TENDOY
TO LONE PINE, LEMHI PASS, AND BANNOCK PASS.
* WHEN...UNTIL 9 AM MDT MONDAY.
* IMPACTS...PLAN FOR WINTER-LIKE CONDITIONS IN THE BACKCOUNTRY AND
HIGHER ELEVATIONS. COLD TEMPERATURES , WIND, AND WET SNOW WILL
ELEVATE THE RISK OF HYPOTHERMIA. HEAVY WET SNOW MAY DOWN TREES,
BLOCKING ACCESS TO BACKCOUNTRY ROADWAYS.
* ADDITIONAL DETAILS...WEST WINDS 10 TO 20 MPH WITH GUSTS UP TO 30
MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD CONSIDER DELAYING TRAVEL ACROSS THE BACKCOUNTRY AND
HIGHER ELEVATIONS. IF TRAVEL IS ABSOLUTELY NECESSARY, CONSIDER TAKING
A WINTER STORM KIT ALONG WITH YOU, INCLUDING SUCH ITEMS AS TIRE
CHAINS, BOOSTER CABLES, FLASHLIGHT, SHOVEL, BLANKETS AND EXTRA
CLOTHING. ALSO TAKE WATER, A FIRST AID KIT, AND ANYTHING ELSE THAT
WOULD HELP YOU SURVIVE IN CASE YOU BECOME STRANDED.
MTZ006-280830-
/O.CON.KMSO.WS.W.0004.000000T0000Z-260629T1500Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
616 PM MDT SAT JUN 27 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY ABOVE
6500 FEET...
* WHAT...HEAVY WET SNOW EXPECTED ABOVE 6500 FEET. TOTAL SNOW
ACCUMULATIONS OF 4 TO 8 INCHES, WITH UP TO 12 INCHES ACROSS THE
HIGHEST PEAKS.
* WHERE...SKALKAHO PASS, NEZ PERCE PASS, BACKCOUNTRY AND HIGHER
ELEVATION AREAS.
* WHEN...UNTIL 9 AM MDT MONDAY.
* IMPACTS...PLAN FOR WINTER-LIKE CONDITIONS IN THE BACKCOUNTRY AND
HIGHER ELEVATIONS. COLD TEMPERATURES, WIND, AND WET SNOW WILL
ELEVATE THE RISK OF HYPOTHERMIA. HEAVY WET SNOW MAY DOWN TREES,
BLOCKING ACCESS TO BACKCOUNTRY ROADWAYS.
* ADDITIONAL DETAILS...WEST WINDS 10 TO 20 MPH WITH GUSTS UP TO 30
MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD CONSIDER DELAYING TRAVEL ACROSS THE BACKCOUNTRY AND
HIGHER ELEVATIONS. IF TRAVEL IS ABSOLUTELY NECESSARY, CONSIDER TAKING
A WINTER STORM KIT ALONG WITH YOU, INCLUDING SUCH ITEMS AS TIRE
CHAINS, BOOSTER CABLES, FLASHLIGHT, SHOVEL, BLANKETS AND EXTRA
CLOTHING. ALSO TAKE WATER, A FIRST AID KIT, AND ANYTHING ELSE THAT
WOULD HELP YOU SURVIVE IN CASE YOU BECOME STRANDED.
MTZ007-280830-
/O.CON.KMSO.WS.W.0004.000000T0000Z-260629T1500Z/
BUTTE/BLACKFOOT REGION-
616 PM MDT SAT JUN 27 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 AM MDT MONDAY ABOVE
6500 FEET...
* WHAT...HEAVY WET SNOW EXPECTED ABOVE 6500 FEET. TOTAL SNOW
ACCUMULATIONS OF 4 TO 8 INCHES, WITH 8 TO 16 INCHES ACROSS THE
ANACONDA PINTLER MOUNTAINS. SNOW LEVELS MAY BRIEFLY LOWER AND COULD
PRODUCE MINOR SLUSHY ACCUMULATION AT HOMESTAKE AND MACDONALD PASS.
* WHERE...GEORGETOWN LAKE, BACKCOUNTRY AND HIGHER ELEVATION AREAS.
* WHEN...UNTIL 9 AM MDT MONDAY.
* IMPACTS...PLAN FOR WINTER-LIKE CONDITIONS IN THE BACKCOUNTRY AND
HIGHER ELEVATIONS. COLD TEMPERATURES, WIND, AND WET SNOW WILL
ELEVATE THE RISK OF HYPOTHERMIA. HEAVY WET SNOW MAY DOWN TREES,
BLOCKING ACCESS TO BACKCOUNTRY ROADWAYS.
* ADDITIONAL DETAILS...WEST WINDS 10 TO 20 MPH WITH GUSTS UP TO 30
MPH.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD CONSIDER DELAYING TRAVEL ACROSS THE BACKCOUNTRY AND
HIGHER ELEVATIONS. IF TRAVEL IS ABSOLUTELY NECESSARY, CONSIDER TAKING
A WINTER STORM KIT ALONG WITH YOU, INCLUDING SUCH ITEMS AS TIRE
CHAINS, BOOSTER CABLES, FLASHLIGHT, SHOVEL, BLANKETS AND EXTRA
CLOTHING. ALSO TAKE WATER, A FIRST AID KIT, AND ANYTHING ELSE THAT
WOULD HELP YOU SURVIVE IN CASE YOU BECOME STRANDED.
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