847
WWUS45 KMSO 171943
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1243 PM MST WED DEC 17 2025
MTZ002-180600-
/O.CON.KMSO.WS.W.0013.000000T0000Z-251218T0600Z/
WEST GLACIER REGION-
1243 PM MST WED DEC 17 2025
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 PM MST THIS
EVENING...
* WHAT...HEAVY SNOW. THERE IS A LIKELIHOOD OF ONGOING MAJOR WINTER
WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS UP TO TWO INCHES.
WINDS GUSTING AS HIGH AS 55 MPH.
* WHERE...MARIAS PASS, BAD ROCK CANYON, HIGHWAY 83 BIGFORK TO SWAN
LAKE, POLEBRIDGE, GLACIER NATIONAL PARK, AND ESSEX.
* WHEN...UNTIL 11 PM MST THIS EVENING.
* IMPACTS...WINTER TRAVELING CONDITIONS. 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 EVENING COMMUTE, 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-MTZ006-181945-
/O.UPG.KMSO.WS.A.0012.251218T1200Z-251220T1200Z/
/O.NEW.KMSO.WW.Y.0049.251219T0000Z-251220T1800Z/
SOUTHERN CLEARWATER MOUNTAINS-BITTERROOT/SAPPHIRE MOUNTAINS-
1243 PM MST WED DEC 17 2025 /1143 AM PST WED DEC 17 2025/
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM MST /4 PM PST/
THURSDAY TO 11 AM MST /10 AM PST/ SATURDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR WINTER
WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 8 AND 15 INCHES
HIGHER ELEVATIONS AND 5 TO 9 INCHES AT LOLO AND LOST TRAIL PASSES.
WINDS GUSTING AS HIGH AS 40 MPH.
* WHERE...DIXIE, HIGHWAY 12 LOWELL TO LOLO PASS, HIGHWAY 93 SULA TO
LOST TRAIL PASS, LOLO PASS, AND ELK CITY.
* WHEN...FROM 5 PM MST /4 PM PST/ THURSDAY TO 11 AM MST /10 AM PST/
SATURDAY.
* IMPACTS...WINTER TRAVELING CONDITIONS. FOR MINOR WINTER WEATHER
IMPACTS, EXPECT A FEW INCONVENIENCES TO NORMAL ACTIVITIES. USE
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
THURSDAY MORNING AND EVENING COMMUTES, ESPECIALLY OVER HIGHER
PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
MTZ004-181945-
/O.NEW.KMSO.WW.Y.0049.251219T0000Z-251220T1800Z/
LOWER CLARK FORK REGION-
1243 PM MST WED DEC 17 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THURSDAY TO 11 AM MST
SATURDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR WINTER
WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS 4 TO 7 INCHES AT LOOKOUT
PASS. WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...I-90 LOOKOUT PASS TO HAUGAN.
* WHEN...FROM 5 PM THURSDAY TO 11 AM MST SATURDAY.
* IMPACTS...WINTER TRAVELING CONDITIONS. FOR MINOR WINTER WEATHER
IMPACTS, EXPECT A FEW INCONVENIENCES TO NORMAL ACTIVITIES. USE
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
THURSDAY EVENING AND FRIDAY MORNING COMMUTES, ESPECIALLY OVER
HIGHER PASSES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SLOW DOWN AND USE CAUTION WHILE TRAVELING. THE LATEST ROAD
CONDITIONS FOR THE STATE YOU ARE CALLING FROM CAN BE OBTAINED BY
CALLING 5 1 1.
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