397
WWUS45 KMSO 131938
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
138 PM MDT FRI MAR 13 2026
MTZ007-150600-
/O.CAN.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
/O.NEW.KMSO.WW.Y.0015.260313T1938Z-260315T0600Z/
BUTTE/BLACKFOOT REGION-
138 PM MDT FRI MAR 13 2026
...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT MDT SATURDAY
NIGHT...
..WINTER STORM WARNING IS CANCELLED
* WHAT...SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING
MODERATE TO ISOLATED MAJOR WINTER WEATHER IMPACTS. ADDITIONAL SNOW
ACCUMULATIONS OF 1 TO 4 INCHES ALONG I 90, 4 TO 8 ELSEWHERE. WINDS
GUSTING AS HIGH AS 55 MPH.
* WHERE...MACDONALD PASS, HIGHWAY 12 GARRISON TO ELLISTON,
GEORGETOWN LAKE, BUTTE, AND HOMESTAKE PASS.
* WHEN...UNTIL MIDNIGHT MDT SATURDAY 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. STRONG WINDS COULD CAUSE TREE DAMAGE.
* ADDITIONAL DETAILS...THE BLACKFOOT REGION, GEORGETOWN LAKE, AND
MACDONALD PASS ARE THE MAIN SPOTS FOR SNOW THROUGH SATURDAY
MORNING.
INTENSE SNOW SQUALLS ARE EXPECTED SATURDAY AFTERNOON THROUGH EVENING
CAUSING PERIODS OF VERY HEAVY SNOW, GUSTY WINDS, AND ICY CONDITIONS.
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.
IDZ005-141800-
/O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
NORTHERN CLEARWATER MOUNTAINS-
1238 PM PDT FRI MAR 13 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT SATURDAY
* WHAT...HEAVY SNOW EXPECTED. THERE IS A LIKELIHOOD OF MAJOR TO
EXTREME WINTER STORM IMPACTS. TOTAL SNOW ACCUMULATIONS 2 TO 8
INCHES IN THE LOWER ELEVATIONS AND 20 TO 50 INCHES IN THE HIGHER
TERRAIN. WINDS GUSTING AS HIGH AS 30 MPH.
* WHERE...HIGHWAY 11 PIERCE TO HEADQUARTERS, PIERCE, AND ELK RIVER.
* WHEN...UNTIL 11 AM PDT SATURDAY.
* IMPACTS... 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 FRIDAY EVENING COMMUTE,
ESPECIALLY OVER HIGHER PASSES.
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.
IDZ006-141800-
/O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
SOUTHERN CLEARWATER MOUNTAINS-
1238 PM PDT FRI MAR 13 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM PDT SATURDAY
ABOVE 5000 FEET...
* WHAT...HEAVY SNOW ABOVE 5000 FEET. THERE IS A LIKELIHOOD OF MAJOR
WINTER STORM IMPACTS. ADDITIONAL SNOW ACCUMULATIONS TRACE TO 2
INCHES IN THE LOWER ELEVATIONS, 6 TO 12 INCHES ABOVE 5000 FEET,
WITH OVER 2 FEET OF SNOW IN THE HIGH TERRAIN. WINDS GUSTING UP TO
40 MPH.
* WHERE...DIXIE AND LOLO PASS.
* WHEN...UNTIL 11 AM PDT SATURDAY.
* 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 FRIDAY
EVENING COMMUTES, ESPECIALLY OVER HIGHER PASSES.
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.
MTZ002-141800-
/O.CON.KMSO.WS.W.0003.000000T0000Z-260314T1800Z/
WEST GLACIER REGION-
138 PM MDT FRI MAR 13 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY
* WHAT...HEAVY SNOW. THERE IS A CHANCE OF DEVELOPING OR ONGOING
MAJOR WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS
BETWEEN 2 AND 8 INCHES.
* WHERE...ESSEX, POLEBRIDGE, MARIAS PASS, HIGHWAY 83 BIGFORK TO SWAN
LAKE, GLACIER NATIONAL PARK, AND BAD ROCK CANYON.
* WHEN...UNTIL NOON MDT SATURDAY.
* 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 FRIDAY
EVENING AND SATURDAY MORNING COMMUTE, ESPECIALLY OVER HIGHER
PASSES.
* ADDITIONAL DETAILS...INTENSE SNOW SQUALLS ARE EXPECTED SATURDAY
MORNING THROUGH AFTERNOON CAUSING PERIODS OF VERY HEAVY SNOW,
GUSTY WINDS, AND ICY CONDITIONS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
PERSONS SHOULD CONSIDER DELAYING ALL TRAVEL. IF TRAVEL IS ABSOLUTELY
NECESSARY, DRIVE WITH EXTREME CAUTION. CONSIDER TAKING A WINTER
STORM KIT ALONG WITH YOU, INCLUDING SUCH ITEMS AS TIRE CHAINS,
BOOSTER CABLES, FLASHLIGHT, SHOVEL, BLANKETS AND EXTRA CLOTHING.
ALSO TAKE WATER, A FIRST AID KIT, AND ANYTHING ELSE THAT WOULD HELP
YOU SURVIVE IN CASE YOU BECOME STRANDED.
MTZ004-141800-
/O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
LOWER CLARK FORK REGION-
138 PM MDT FRI MAR 13 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY
* WHAT...HEAVY SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING
MAJOR WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS OF 6
TO 10 INCHES, EXCEPT 1 TO 3 INCHES IN THE LOWER ELEVATIONS.
* WHERE...EVARO HILL, HIGHWAY 200 TROUT CREEK TO HERON, I-90 LOOKOUT
PASS TO HAUGAN, AND HIGHWAY 200 THOMPSON FALLS TO PLAINS.
* WHEN...UNTIL NOON MDT SATURDAY.
* 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 FRIDAY
EVENING COMMUTE, ESPECIALLY OVER HIGHER PASSES.
* ADDITIONAL DETAILS...INTENSE SNOW SQUALLS ARE EXPECTED SATURDAY
AFTERNOON THROUGH EVENING CAUSING PERIODS OF VERY HEAVY SNOW,
GUSTY WINDS, AND ICY CONDITIONS.
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.
MTZ006-141800-
/O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
BITTERROOT/SAPPHIRE MOUNTAINS-
138 PM MDT FRI MAR 13 2026
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY
ABOVE 5000 FEET...
* WHAT...HEAVY SNOW ABOVE 5000 FEET. THERE IS THE LIKELIHOOD OF
ONGOING MAJOR WINTER WEATHER IMPACTS. ADDITIONAL SNOW
ACCUMULATIONS BETWEEN 2 AND 5 INCHES IN THE LOWER ELEVATIONS, 6 TO
12 INCHES OVER LOST TRAIL AND LOLO PASSES, WITH 2 FEET IN THE HIGH
TERRAIN. WINDS GUSTING AS HIGH AS 40 MPH.
* WHERE...LOLO PASS AND HIGHWAY 93 SULA TO LOST TRAIL PASS.
* WHEN...UNTIL NOON MDT SATURDAY.
* 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 FRIDAY
EVENING COMMUTE, ESPECIALLY OVER HIGHER PASSES. GUSTY WINDS COULD
BRING DOWN TREE BRANCHES.
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.
MTZ043-141800-
/O.CON.KMSO.WS.W.0002.000000T0000Z-260314T1800Z/
POTOMAC/SEELEY LAKE REGION-
138 PM MDT FRI MAR 13 2026
..WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT SATURDAY
* WHAT...HEAVY SNOW. THERE IS A LIKELIHOOD OF DEVELOPING OR ONGOING
MAJOR WINTER WEATHER IMPACTS. ADDITIONAL SNOW ACCUMULATIONS OF 2
TO 5 INCHES IN THE VALLEYS AND 12 TO 24 INCHES IN THE MOUNTAINS.
WINDS GUSTING AS HIGH AS 35 MPH.
* WHERE...I-90 EAST MISSOULA TO BEARMOUTH, HIGHWAY 200 BONNER TO
GREENOUGH, AND HIGHWAY 83 SEELEY LAKE TO CONDON.
* WHEN...UNTIL NOON MDT SATURDAY.
* 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 FRIDAY
EVENING COMMUTE, ESPECIALLY OVER HIGHER PASSES.
* ADDITIONAL DETAILS...INTENSE SNOW SQUALL ARE EXPECTED SATURDAY
AFTERNOON THROUGH EVENING CAUSING PERIODS OF VERY HEAVY SNOW,
GUSTY WINDS, AND ICY CONDITIONS.
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.
MTZ003-150000-
/O.NEW.KMSO.WW.Y.0015.260314T0300Z-260315T0000Z/
FLATHEAD/MISSION VALLEYS-
138 PM MDT FRI MAR 13 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 6 PM
MDT SATURDAY...
* WHAT...SNOW EXPECTED. THERE IS A LIKELIHOOD OF MODERATE WINTER
WEATHER IMPACTS. TOTAL SNOW ACCUMULATIONS BETWEEN 2 AND 6 INCHES.
WINDS GUSTING AS HIGH AS 40 MPH.
* WHERE...FLATHEAD VALLEY, MISSION VALLEY, FLATHEAD LAKE, AND POLSON.
* WHEN...FROM 9 PM THIS EVENING TO 6 PM MDT SATURDAY.
* 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.
* ADDITIONAL DETAILS...OVERNIGHT ACCUMULATIONS RANGE FROM 1 TO 3
INCHES.
INTENSE SNOW SQUALL ARE EXPECTED SATURDAY MORNING THROUGH AFTERNOON
CAUSING PERIODS OF VERY HEAVY SNOW, GUSTY WINDS, AND ICY CONDITIONS.
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.
JK
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