606
WWUS45 KMSO 160957
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
257 AM MST TUE DEC 16 2025
MTZ002-180600-
/O.UPG.KMSO.WS.A.0011.251217T0300Z-251218T0600Z/
/O.NEW.KMSO.WS.W.0013.251217T0300Z-251218T0600Z/
WEST GLACIER REGION-
257 AM MST TUE DEC 16 2025
...WINTER STORM WARNING IN EFFECT FROM 8 PM THIS EVENING TO 11 PM
MST WEDNESDAY...
* WHAT...DAMAGING WINDS AND HEAVY SNOW EXPECTED. THERE IS A
LIKELIHOOD OF MAJOR WINTER WEATHER IMPACTS TO ISOLATED EXTREME
WINTER STORM IMPACTS. TOTAL SNOW ACCUMULATIONS OF 2 TO 5 IN INCHES
IN THE VALLEYS AND 8 TO 12 INCHES AT PASS LEVEL. DAMAGING WINDS
GUSTING AS HIGH AS 60 MPH IN THE LOWER ELEVATIONS, 70 MPH IN
HIGHER TERRAIN.
* WHERE...MARIAS PASS, HIGHWAY 83 BIGFORK TO SWAN LAKE, BAD ROCK
CANYON, GLACIER NATIONAL PARK, ESSEX, AND POLEBRIDGE.
* WHEN...FROM 8 PM THIS EVENING TO 11 PM MST WEDNESDAY.
* IMPACTS...FOR MAJOR WINTER WEATHER IMPACTS, EXPECT CONSIDERABLE
DISRUPTIONS TO NORMAL ACTIVITIES. DANGEROUS OR IMPOSSIBLE
TRAVELING CONDITIONS. AVOID TRAVEL IN THE IMPACTED AREAS IF
POSSIBLE. WIDESPREAD CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE
MAY OCCUR. FOR EXTREME WINTER STORM IMPACTS, EXPECT SUBSTANTIAL
DISRUPTIONS TO NORMAL ACTIVITIES. EXTREMELY DANGEROUS OR
IMPOSSIBLE TRAVELING CONDITIONS. TRAVEL IN THE IMPACTED AREAS IS
NOT ADVISED. EXTENSIVE AND WIDESPREAD CLOSURES AND DISRUPTIONS TO
INFRASTRUCTURE MAY OCCUR. LIFE SAVING ACTIONS MAY BE NEEDED. THE
HAZARDOUS CONDITIONS COULD IMPACT THE WEDNESDAY MORNING AND
EVENING COMMUTES, ESPECIALLY OVER HIGHER PASSES. VERY STRONG WINDS
COULD CAUSE EXTENSIVE TREE DAMAGE AND POWER OUTAGES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU MUST TRAVEL, KEEP AN EXTRA FLASHLIGHT, FOOD, AND WATER IN
YOUR VEHICLE IN CASE OF AN EMERGENCY. THE LATEST ROAD CONDITIONS FOR
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.
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