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WWUS45 KMSO 201817

WSWMSO



URGENT - WINTER WEATHER MESSAGE

National Weather Service Missoula MT

1217 PM MDT Fri Jun 20 2025



MTZ002-221800-

/O.EXT.KMSO.WS.W.0008.250621T0800Z-250622T1800Z/

West Glacier Region-

1217 PM MDT Fri Jun 20 2025



...WINTER STORM WARNING NOW IN EFFECT FROM 2 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. Wind 

  gusts up to 40 mph in exposed areas.



* WHERE...Marias Pass and Glacier National Park higher elevations 

  including Going-to-the-Sun Road and Logan Pass.



* WHEN...From 2 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. Increased risk of hypothermia.



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.



&&



$$



IDZ006-009-010-MTZ006-007-043-221800-

/O.NEW.KMSO.WW.Y.0035.250621T0800Z-250622T1800Z/

Southern Clearwater Mountains-Western Lemhi County-Eastern Lemhi

County-Bitterroot/Sapphire Mountains-Butte/Blackfoot Region-

Potomac/Seeley Lake Region-

1217 PM MDT Fri Jun 20 2025 /1117 AM PDT Fri Jun 20 2025/



...WINTER WEATHER ADVISORY IN EFFECT FROM 2 AM MDT /1 AM PDT/ 

SATURDAY TO NOON MDT /11 AM PDT/ SUNDAY ABOVE 6,000 FEET...



* WHAT...Snow expected Above 6,000 feet. Likelihood of minor impacts 

  from snow is greater than 60 percent. Total snow accumulations up 

  to 4 inches. Wind gusts around 30 mph in exposed areas.



* WHERE...In IDAHO, Eastern Lemhi County, Southern Clearwater 

  Mountains, and Western Lemhi County. In MONTANA, 

  Bitterroot/Sapphire Mountains, Butte/Blackfoot Region, and 

  Potomac/Seeley Lake Region.



* WHEN...From 2 AM MDT /1 AM PDT/ Saturday to noon MDT /11 AM PDT/ 

  Sunday.



* IMPACTS...For MODERATE impacts from snow, expect disruptions to 

  normal activities. Hazardous traveling conditions. Use extra 

  caution while driving. Closures and disruptions to infrastructure 

  may occur. For MINOR impacts from snow, expect a few 

  inconveniences to normal activities. Use caution while driving. 

  Increased risk of hypothermia.



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.



&&



$$