496
WWUS45 KMSO 200925
WSWMSO
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
325 AM MDT FRI JUN 20 2025
MTZ002-211800-
/O.UPG.KMSO.WS.A.0006.250621T1800Z-250622T1800Z/
/O.NEW.KMSO.WS.W.0008.250621T1500Z-250622T1800Z/
WEST GLACIER REGION-
325 AM MDT FRI JUN 20 2025
...WINTER STORM WARNING IN EFFECT FROM 9 AM SATURDAY TO NOON MDT
SUNDAY ABOVE 5000 FEET...
* WHAT...HEAVY WET SNOW EXPECTED ABOVE 5000 FEET. LIKELIHOOD OF
EXTREME IMPACTS FROM 5 TO 12 INCHES OF SNOW IS GREATER THAN 90
PERCENT ABOVE 6000 FEET, AND UP TO A 30 PERCENT CHANCE OF ISOLATED
IMPACTS FROM AROUND 2 FEET OF SNOW IN THE HIGHEST TERRAIN.
* WHERE...MARIAS PASS, GLACIER NATIONAL PARK HIGHER ELEVATIONS
INCLUDING GOING-TO-THE-SUN ROAD AND LOGAN PASS.
* WHEN...FROM 9 AM SATURDAY TO NOON MDT SUNDAY.
* IMPACTS...FOR MAJOR IMPACTS FROM SNOW, EXPECT CONSIDERABLE
DISRUPTIONS TO NORMAL ACTIVITIES. DANGEROUS OR IMPOSSIBLE
CONDITIONS. AVOID TRAVEL IN THE IMPACTED AREAS IF POSSIBLE.
WIDESPREAD CLOSURES AND DISRUPTIONS TO INFRASTRUCTURE MAY OCCUR.
FOR EXTREME IMPACTS FROM SNOW, EXPECT SUBSTANTIAL DISRUPTIONS TO
NORMAL ACTIVITIES. EXTREMELY DANGEROUS OR IMPOSSIBLE 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.
* ADDITIONAL DETAILS...LIGHT SNOW ACCUMULATIONS ARE EXPECTED DOWN TO
5000 FEET, MAINLY IMPACTING VISIBILITY AND NON-PAVED SURFACES.
SNOW LOADING ON TREES MAY PRODUCE TREE FALLS AND CREATE POWER
OUTAGES.
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.
JK
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