592
WWUS45 KMSO 101847
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
1247 PM MDT FRI OCT 10 2025
MTZ002-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WS.W.0010.251012T0000Z-251013T1800Z/
WEST GLACIER REGION-
1247 PM MDT FRI OCT 10 2025
...WINTER STORM WARNING IN EFFECT FROM 6 PM SATURDAY TO NOON MDT
MONDAY...
* WHAT...HEAVY SNOW EXPECTED. THERE IS A LIKELIHOOD OF MAJOR WINTER
WEATHER IMPACTS TO ISOLATED EXTREME WINTER STORM IMPACTS. TOTAL
SNOW ACCUMULATIONS UP TO 3 INCHES IN THE VALLEYS WITH 5 TO 12
INCHES IN THE HIGHER TERRAIN AND MOUNTAIN PASSES. THE HIGHEST
PEAKS COULD RECEIVE UP TO 20 INCHES.
* WHERE...MARIAS PASS, GLACIER NATIONAL PARK HIGHER ELEVATIONS
INCLUDING GOING-TO-THE-SUN ROAD AND LOGAN PASS, BAD ROCK CANYON,
ESSEX, POLEBRIDGE, AND HIGHWAY 83 BIGFORK TO SWAN LAKE.
* WHEN...FROM 6 PM SATURDAY TO NOON MDT MONDAY.
* 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 MONDAY
MORNING COMMUTE, ESPECIALLY OVER HIGHER PASSES.
* ADDITIONAL DETAILS...HEAVIEST SNOW IS EXPECTED LATE SATURDAY NIGHT
INTO SUNDAY MORNING. A FLASH FREEZE OF WET ROADWAYS IS POSSIBLE
SATURDAY NIGHT AND AGAIN SUNDAY NIGHT.
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.
IDZ005-006-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1800Z/
NORTHERN CLEARWATER MOUNTAINS-SOUTHERN CLEARWATER MOUNTAINS-
1147 AM PDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM SATURDAY TO 11 AM PDT
MONDAY ABOVE 5500 FEET...
* WHAT...SNOW EXPECTED ABOVE 5500 FEET. THERE IS A LIKELIHOOD OF
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. TOTAL SNOW
ACCUMULATIONS UP TO 7 INCHES.
* WHERE...DIXIE.
* WHEN...FROM 5 PM SATURDAY TO 11 AM PDT MONDAY.
* 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.
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.
IDZ009-010-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1200Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1200Z/
WESTERN LEMHI COUNTY-EASTERN LEMHI COUNTY-
1247 PM MDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SATURDAY TO 6 AM MDT
MONDAY ABOVE 5500 FEET...
* WHAT...SNOW EXPECTED ABOVE 5500 FEET. THERE IS A LIKELIHOOD OF
MINOR TO MODERATE WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS
1 TO 6 INCHES.
* WHERE...HIGHWAY 28 TENDOY TO LONE PINE, HIGHWAY 93 LOST TRAIL PASS
TO GIBBONSVILLE, BANNOCK PASS, WILLIAMS CREEK SUMMIT, AND LEMHI
PASS.
* WHEN...FROM 6 PM SATURDAY TO 6 AM MDT MONDAY.
* 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.
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.
MTZ004-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1800Z/
LOWER CLARK FORK REGION-
1247 PM MDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SATURDAY TO NOON MDT
MONDAY ABOVE 4500 FEET...
* WHAT...SNOW EXPECTED ABOVE 4500 FEET. THERE IS A LIKELIHOOD OF
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. TOTAL SNOW
ACCUMULATIONS UP TO 6 INCHES.
* WHERE...LOWER CLARK FORK REGION.
* WHEN...FROM 6 PM SATURDAY TO NOON MDT MONDAY.
* 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.
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.
MTZ006-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1800Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
1247 PM MDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SATURDAY TO NOON MDT
MONDAY ABOVE 5500 FEET...
* WHAT...SNOW EXPECTED ABOVE 5500 FEET. THERE IS A LIKELIHOOD OF
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. TOTAL SNOW
ACCUMULATIONS BETWEEN 1 AND 6 INCHES.
* WHERE...HIGHWAY 93 SULA TO LOST TRAIL PASS.
* WHEN...FROM 6 PM SATURDAY TO NOON MDT MONDAY.
* 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.
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.
MTZ007-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1800Z/
BUTTE/BLACKFOOT REGION-
1247 PM MDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SATURDAY TO NOON MDT
MONDAY ABOVE 5000 FEET...
* WHAT...SNOW EXPECTED ABOVE 5000 FEET. THERE IS A LIKELIHOOD OF
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. TOTAL SNOW
ACCUMULATIONS UP TO 3 INCHES IN THE HIGHER VALLEYS WITH 3 TO 8
INCHES IN THE MOUNTAINS.
* WHERE...HOMESTAKE PASS, BUTTE, MACDONALD PASS, AND GEORGETOWN LAKE.
* WHEN...FROM 6 PM SATURDAY TO NOON MDT MONDAY.
* 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.
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.
MTZ043-111900-
/O.UPG.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
/O.NEW.KMSO.WW.Y.0037.251012T0000Z-251013T1800Z/
POTOMAC/SEELEY LAKE REGION-
1247 PM MDT FRI OCT 10 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 6 PM SATURDAY TO NOON MDT
MONDAY ABOVE 4000 FEET...
* WHAT...SNOW EXPECTED ABOVE 4000 FEET. THERE IS A LIKELIHOOD OF
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. TOTAL SNOW
ACCUMULATIONS UP TO TWO INCHES IN THE VALLEYS WITH 5 TO 12 INCHES
IN THE HIGHER TERRAIN. THE HIGHEST PEAKS COULD RECEIVE UP TO 20
INCHES..
* WHERE...HIGHWAY 83 SEELEY LAKE TO CONDON.
* WHEN...FROM 6 PM SATURDAY TO NOON MDT MONDAY.
* 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.
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.
MTZ001-111900-
/O.CON.KMSO.WS.A.0008.251012T0000Z-251013T1800Z/
KOOTENAI/CABINET REGION-
1247 PM MDT FRI OCT 10 2025
...WINTER STORM WATCH REMAINS IN EFFECT FROM SATURDAY EVENING
THROUGH MONDAY MORNING...
* WHAT...HEAVY SNOW POSSIBLE. THERE IS A CHANCE OF MODERATE TO MAJOR
WINTER WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS UP TO 3 INCHES IN
THE VALLEYS AND UP TO 15 INCHES IN THE HIGHER TERRAIN POSSIBLE.
* WHERE...HIGHWAY 56 BULL LAKE ROAD, HIGHWAY 2 KALISPELL TO LIBBY,
HIGHWAY 93 EUREKA TO WHITEFISH, AND HIGHWAY 37 EUREKA TO LIBBY.
* WHEN...FROM SATURDAY EVENING THROUGH MONDAY MORNING.
* 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 MONDAY
MORNING COMMUTE, ESPECIALLY OVER HIGHER PASSES.
* ADDITIONAL DETAILS...THE HEAVIEST SNOW APPEARS TO OCCUR SUNDAY
NIGHT INTO MONDAY MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MONITOR THE LATEST FORECASTS FOR UPDATES ON THIS SITUATION.
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