025
WWUS45 KMSO 210859
WSWMSO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
259 AM MDT Fri Mar 21 2025

MTZ004-220900-
/O.UPG.KMSO.WW.Y.0024.250322T0000Z-250322T1800Z/
/O.NEW.KMSO.WS.W.0006.250322T0000Z-250322T1800Z/
Lower Clark Fork Region-
259 AM MDT Fri Mar 21 2025

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON MDT
SATURDAY ABOVE 4000 FEET...

* WHAT...Heavy snow expected above 4000 feet. Likelihood of major
  impacts from snow is up to 80 percent. Total snow accumulations
  between 8 and 12 inches. Winds gusting as high as 40 mph.

* WHERE...I-90 Lookout Pass to Haugan.

* WHEN...From 6 PM this evening to noon MDT Saturday.

* IMPACTS...Winter traveling conditions. For MAJOR impacts from
  snow, 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.

* ADDITIONAL DETAILS...A burst of intense snowfall rates and strong
  winds will accompany a cold frontal passage Friday evening.

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.

&&

$$

IDZ005-006-010-MTZ002-006-220900-
/O.CON.KMSO.WW.Y.0024.250322T0000Z-250322T1800Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-
Eastern Lemhi County-West Glacier Region-Bitterroot/Sapphire
Mountains-
259 AM MDT Fri Mar 21 2025 /159 AM PDT Fri Mar 21 2025/

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 6 PM MDT /5 PM
PDT/ THIS EVENING TO NOON MDT /11 AM PDT/ SATURDAY...

* WHAT...Snow expected. Likelihood of moderate impacts from snow is
  greater than 80 percent. Total snow accumulations between 6 and 12
  inches above 4000 feet. Winds gusting as high as 35 mph. Below
  4000 feet, a trace to 1 inch of snow will be possible, especially
  on un-paved surfaces.

* WHERE...In IDAHO, Eastern Lemhi County, Northern Clearwater
  Mountains, and Southern Clearwater Mountains. In MONTANA, West
  Glacier Region and Bitterroot/Sapphire Mountains.

* WHEN...From 6 PM MDT /5 PM PDT/ this evening to noon MDT /11 AM
  PDT/ Saturday.

* 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.

* ADDITIONAL DETAILS...A burst of intense snowfall rates and strong
  winds will accompany a cold frontal passage across Marias Passes
  as early as Friday evening before reaching Lost Trail early
  Saturday morning.

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.

&&

$$

MTZ007-220900-
/O.CON.KMSO.WW.Y.0024.250322T0600Z-250322T1800Z/
Butte/Blackfoot Region-
259 AM MDT Fri Mar 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO NOON MDT SATURDAY...

* WHAT...Snow expected. Likelihood of minor to moderate impacts from
  around 1 to 3 inches of snow is 80 percent. Winds gusting as high
  as 50 mph.

* WHERE...Butte, Homestake Pass, MacDonald Pass, Highway 12 Garrison
  to Elliston, and Georgetown Lake.

* WHEN...From midnight tonight to noon MDT Saturday.

* IMPACTS...For MINOR impacts from snow, expect a few inconveniences
  to normal activities. Use caution while driving. Winter traveling
  conditions. Gusty winds could bring down tree branches.

* ADDITIONAL DETAILS...A burst of intense snowfall rates and strong
  winds will accompany a cold frontal passage early Saturday morning.

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.

&&

$$

MTZ043-220900-
/O.CON.KMSO.WW.Y.0024.250322T0600Z-250322T1800Z/
Potomac/Seeley Lake Region-
259 AM MDT Fri Mar 21 2025

...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT
TO NOON MDT SATURDAY...

* WHAT...Snow expected. Likelihood of minor to moderate impacts from
  around 1 to 3 inches of snow is 90 percent, and 3 to 6 inches of
  snow is 40 percent. Winds gusting as high as 40 mph.

* WHERE...I-90 East Missoula to Bearmouth, Highway 83 Seeley Lake to
  Condon, and Highway 200 Bonner to Greenough.

* WHEN...From midnight tonight to noon MDT Saturday.

* 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.

* ADDITIONAL DETAILS...A burst of intense snowfall rates and strong
  winds will accompany a cold frontal passage early Saturday morning.

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.

&&

$$