865
WWUS45 KMSO 161847
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1147 AM MST TUE DEC 16 2025
MTZ002-171900-
/O.CON.KMSO.WS.W.0013.251217T0300Z-251218T0600Z/
WEST GLACIER REGION-
1147 AM MST TUE DEC 16 2025
...WINTER STORM WARNING REMAINS 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...ESSEX, MARIAS PASS, BAD ROCK CANYON, POLEBRIDGE, GLACIER
NATIONAL PARK, AND HIGHWAY 83 BIGFORK TO SWAN LAKE.
* 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. THE HAZARDOUS CONDITIONS COULD IMPACT THE WEDNESDAY
MORNING AND EVENING COMMUTES, ESPECIALLY OVER HIGHER PASSES.
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. THE LATEST ROAD CONDITIONS FOR
THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY CALLING 5 1 1.
IDZ006-MTZ006-171900-
/O.NEW.KMSO.WS.A.0012.251218T1200Z-251220T1200Z/
SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS-
1147 AM MST TUE DEC 16 2025 /1047 AM PST TUE DEC 16 2025/
...WINTER STORM WATCH IN EFFECT FROM LATE WEDNESDAY NIGHT THROUGH
LATE FRIDAY NIGHT...
* WHAT...HEAVY SNOW POSSIBLE. THERE IS A CHANCE OF MODERATE TO MAJOR
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 1 TO 5
INCHES IN THE VALLEYS AND UP TO 24 INCHES IN THE MOUNTAINS
POSSIBLE. WINDS COULD GUST AS HIGH AS 45 MPH.
* WHERE...HIGHWAY 93 SULA TO LOST TRAIL PASS, DIXIE, ELK CITY,
HIGHWAY 12 LOWELL TO LOLO PASS, AND LOLO PASS.
* WHEN...FROM LATE WEDNESDAY NIGHT THROUGH LATE FRIDAY NIGHT.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE
MAY OCCUR. 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. THE HAZARDOUS CONDITIONS COULD IMPACT THE THURSDAY
MORNING AND EVENING COMMUTES, ESPECIALLY OVER HIGHER PASSES. GUSTY
WINDS COULD BRING DOWN TREE BRANCHES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
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