677
WWUS45 KMSO 011845
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1145 AM MST MON DEC 1 2025
IDZ008-021845-
/O.EXB.KMSO.WW.Y.0045.251202T0300Z-251202T1900Z/
LOWER HELLS CANYON/SALMON RIVER REGION-
1045 AM PST MON DEC 1 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 11 AM
PST TUESDAY ABOVE 2500 FEET...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES,
PRIMARILY OVER WHITE BIRD GRADE.
* WHERE...WHITE BIRD GRADE.
* WHEN...FROM 7 PM THIS EVENING TO 11 AM PST TUESDAY.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
TUESDAY MORNING COMMUTE, 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.
IDZ007-021700-
/O.EXB.KMSO.WW.Y.0045.251202T0600Z-251202T1700Z/
OROFINO/GRANGEVILLE REGION-
1045 AM PST MON DEC 1 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 9 AM
PST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS OF 1 TO 3 INCHES,
EXCEPT UP TO 5 INCHES ON HIGHER BENCHES SUCH AS GREER GRADE.
* WHERE...CAMAS PRAIRIE, GREER GRADE, OROFINO AND GRANGEVILLE AND
VICINITY.
* WHEN...FROM 10 PM THIS EVENING TO 9 AM PST TUESDAY.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
TUESDAY MORNING COMMUTE, 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.
IDZ005-021845-
/O.EXA.KMSO.WW.Y.0045.251202T0300Z-251203T0000Z/
NORTHERN CLEARWATER MOUNTAINS-
1045 AM PST MON DEC 1 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 4 PM
PST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 5
INCHES.
* WHERE...ELK RIVER, HIGHWAY 11 PIERCE TO HEADQUARTERS, AND PIERCE.
* WHEN...FROM 7 PM THIS EVENING TO 4 PM PST TUESDAY.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
TUESDAY MORNING COMMUTE, 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.
MTZ007-021845-
/O.EXA.KMSO.WW.Y.0045.251202T0300Z-251203T0000Z/
BUTTE/BLACKFOOT REGION-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 5 PM
MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS OF 1 TO 2 INCHES
FOR VALLEYS INCLUDING BUTTE. 3 TO 5 INCHES FOR HOMESTAKE PASS,
MACDONALD PASS AND IN THE VICINITY OF GEORGETOWN LAKE.
* WHERE...HIGHWAY 12 GARRISON TO ELLISTON, GEORGETOWN LAKE, BUTTE,
HOMESTAKE PASS, AND MACDONALD PASS.
* WHEN...FROM 8 PM THIS EVENING TO 5 PM MST TUESDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
WINTER TRAVELING CONDITIONS. THE HAZARDOUS CONDITIONS COULD IMPACT
THE TUESDAY 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.
MTZ001-021845-
/O.CON.KMSO.WW.Y.0045.251201T2000Z-251202T1900Z/
KOOTENAI/CABINET REGION-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MST
TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 5
INCHES. DAYTIME MELTING COMBINED WITH SUB-FREEZING TEMPERATURES
EXPECTED AFTER DARK WILL CREATE A POTENTIAL FOR BLACK ICE.
CONDITIONS WILL BECOME SLICKER TONIGHT.
* WHERE...HIGHWAY 56 BULL LAKE ROAD, HIGHWAY 37 EUREKA TO LIBBY,
HIGHWAY 93 EUREKA TO WHITEFISH, AND HIGHWAY 2 KALISPELL TO LIBBY.
* WHEN...UNTIL NOON MST TUESDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. FOR MODERATE WINTER WEATHER
IMPACTS, EXPECT DISRUPTIONS TO NORMAL ACTIVITIES. USE CAUTION
WHILE DRIVING. WINTER TRAVELING CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE MONDAY EVENING AND TUESDAY MORNING
COMMUTES.
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.
MTZ002-043-021845-
/O.CON.KMSO.WW.Y.0045.251201T2100Z-251203T0000Z/
WEST GLACIER REGION-POTOMAC/SEELEY LAKE REGION-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO 5 PM MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 3 AND 7
INCHES, EXCEPT UP TO 10 INCHES IN THE SEELEY-SWAN VALLEY. DAYTIME
MELTING COMBINED WITH SUB-FREEZING TEMPERATURES EXPECTED AFTER
DARK WILL CREATE A POTENTIAL FOR BLACK ICE.
* WHERE...BAD ROCK CANYON, POLEBRIDGE, I-90 EAST MISSOULA TO
BEARMOUTH, HIGHWAY 83 BIGFORK TO SWAN LAKE, MARIAS PASS, HIGHWAY
83 SEELEY LAKE TO CONDON, HIGHWAY 200 BONNER TO GREENOUGH, GLACIER
NATIONAL PARK, AND ESSEX.
* WHEN...FROM 2 PM THIS AFTERNOON TO 5 PM MST TUESDAY.
* 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. THE HAZARDOUS CONDITIONS COULD IMPACT THE MONDAY
EVENING AND TUESDAY MORNING COMMUTES, ESPECIALLY OVER HIGHER
PASSES.
* ADDITIONAL DETAILS...BETWEEN 10 AND 16 INCHES OF TOTAL SNOW
ACCUMULATION IS POSSIBLE IN THE MISSION AND SWAN RANGES, WHILE THE
WHITEFISH AND LEWIS RANGES COULD RECEIVE 5 TO 10 INCHES.
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.
BE PREPARED FOR SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE
DRIVING. IF YOU ARE GOING OUTSIDE, WATCH YOUR FIRST FEW STEPS TAKEN
ON STAIRS, SIDEWALKS, AND DRIVEWAYS. THESE SURFACES COULD BE ICY AND
SLIPPERY, INCREASING YOUR RISK OF A FALL AND INJURY.
MTZ003-021845-
/O.CON.KMSO.WW.Y.0045.251201T2100Z-251202T1900Z/
FLATHEAD/MISSION VALLEYS-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO NOON MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 5
INCHES, EXCEPT 5 TO 8 INCHES BIGFORK TO MANY LAKES REGION. DAYTIME
MELTING COMBINED WITH SUB-FREEZING TEMPERATURES EXPECTED AFTER
DARK WILL CREATE A POTENTIAL FOR BLACK ICE.
* WHERE...MISSION VALLEY, FLATHEAD VALLEY, POLSON, AND FLATHEAD LAKE.
* WHEN...FROM 2 PM THIS AFTERNOON TO NOON MST TUESDAY.
* 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. THE HAZARDOUS CONDITIONS COULD IMPACT THE MONDAY
EVENING AND TUESDAY 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.
BE PREPARED FOR SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE
DRIVING. IF YOU ARE GOING OUTSIDE, WATCH YOUR FIRST FEW STEPS TAKEN
ON STAIRS, SIDEWALKS, AND DRIVEWAYS. THESE SURFACES COULD BE ICY AND
SLIPPERY, INCREASING YOUR RISK OF A FALL AND INJURY.
MTZ004-021845-
/O.CON.KMSO.WW.Y.0045.251201T2100Z-251202T1900Z/
LOWER CLARK FORK REGION-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 2 PM THIS
AFTERNOON TO NOON MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 5
INCHES. DAYTIME MELTING COMBINED WITH SUB-FREEZING TEMPERATURES
EXPECTED AFTER DARK WILL CREATE A POTENTIAL FOR BLACK ICE.
* WHERE...I-90 LOOKOUT PASS TO HAUGAN, HIGHWAY 200 TROUT CREEK TO
HERON, EVARO HILL, AND HIGHWAY 200 THOMPSON FALLS TO PLAINS.
* WHEN...FROM 2 PM THIS AFTERNOON TO NOON MST TUESDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. FOR MODERATE WINTER WEATHER
IMPACTS, EXPECT DISRUPTIONS TO NORMAL ACTIVITIES. USE CAUTION
WHILE DRIVING. WINTER TRAVELING CONDITIONS. THE HAZARDOUS
CONDITIONS COULD IMPACT THE MONDAY EVENING AND TUESDAY 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.
BE PREPARED FOR SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE
DRIVING. IF YOU ARE GOING OUTSIDE, WATCH YOUR FIRST FEW STEPS TAKEN
ON STAIRS, SIDEWALKS, AND DRIVEWAYS. THESE SURFACES COULD BE ICY AND
SLIPPERY, INCREASING YOUR RISK OF A FALL AND INJURY.
IDZ006-021845-
/O.CON.KMSO.WW.Y.0045.251202T0300Z-251203T0000Z/
SOUTHERN CLEARWATER MOUNTAINS-
1045 AM PST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 4 PM PST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS UP TO 7 INCHES
FOR LOLO PASS. 1 TO 2 INCHES FOR THE LOWER ELEVATIONS ALONG
HIGHWAY 12.
* WHERE...HIGHWAY 12 LOWELL TO LOLO PASS, DIXIE, AND ELK CITY.
* WHEN...FROM 7 PM THIS EVENING TO 4 PM PST TUESDAY.
* IMPACTS...FOR MODERATE WINTER WEATHER IMPACTS, EXPECT DISRUPTIONS
TO NORMAL ACTIVITIES. HAZARDOUS TRAVELING CONDITIONS. USE EXTRA
CAUTION WHILE DRIVING. THE HAZARDOUS CONDITIONS COULD IMPACT THE
TUESDAY MORNING COMMUTE, 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.
MTZ005-021845-
/O.CON.KMSO.WW.Y.0045.251202T0300Z-251202T2100Z/
MISSOULA/BITTERROOT VALLEYS-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 2 PM MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A CHANCE OF MINOR WINTER WEATHER
IMPACTS. TOTAL SNOW ACCUMULATIONS 1 TO 4 INCHES. DAYTIME MELTING
COMBINED WITH SUB-FREEZING TEMPERATURES EXPECTED AFTER DARK WILL
CREATE A POTENTIAL FOR BLACK ICE. THE TUESDAY MORNING COMMUTE
COULD BE IMPACTED WITH SLICK SNOW COVERED ROADS.
* WHERE...BITTERROOT VALLEY AND MISSOULA.
* WHEN...FROM 8 PM THIS EVENING TO 2 PM MST TUESDAY.
* IMPACTS...FOR MINOR WINTER WEATHER IMPACTS, EXPECT A FEW
INCONVENIENCES TO NORMAL ACTIVITIES. USE CAUTION WHILE DRIVING.
WINTER TRAVELING CONDITIONS. THE HAZARDOUS CONDITIONS COULD IMPACT
THE TUESDAY MORNING COMMUTE, 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.
MTZ006-021845-
/O.CON.KMSO.WW.Y.0045.251202T0300Z-251203T0000Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
1145 AM MST MON DEC 1 2025
...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING
TO 5 PM MST TUESDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MINOR TO MODERATE
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS 4 TO 7 INCHES.
* WHERE...HIGHWAY 93 SULA TO LOST TRAIL PASS AND LOLO PASS.
* WHEN...FROM 8 PM THIS EVENING TO 5 PM MST TUESDAY.
* 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. THE HAZARDOUS CONDITIONS COULD IMPACT THE TUESDAY
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.
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