National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

WEST GLACIER (WGRM8)

Lat: 48.51061°NLon: 113.99677°WElev: 3165.0ft.

NA

35°F

2°C

Humidity 100%
Wind Speed WNW 0 MPH
Barometer NA
Dewpoint 35°F (2°C)
Visibility NA
Last update 07 Dec 10:12 PM MST
Extended Forecast for

16 Miles WSW St Mary MT

Wind Advisory December 8, 11:00pm until December 9, 11:00am
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Snow likely. The snow could be heavy at times. Widespread blowing snow. Cloudy, with a low around 22. Windy, with a west southwest wind 36 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of 4 to 8 inches possible.

    Low: 22 °F

    Heavy Snow
    and Blowing
    Snow

  • Monday

    Monday: Snow likely before 7am, then snow after 8am. The snow could be heavy at times. Widespread blowing snow after 8am. High near 31. Windy, with a southwest wind 28 to 36 mph, with gusts as high as 49 mph. Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.

    High: 31 °F

    Heavy Snow
    and Blowing
    Snow

  • Monday Night

    Monday Night: Snow. The snow could be heavy at times. Widespread blowing snow. Low around 21. Windy, with a southwest wind 31 to 41 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.

    Low: 21 °F

    Heavy Snow
    and Blowing
    Snow

  • Tuesday

    Tuesday: Snow likely, mainly before 11am. Widespread blowing snow, mainly before 11am. Mostly cloudy, with a high near 29. Windy, with a west southwest wind 36 to 41 mph decreasing to 24 to 29 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 29 °F

    Snow Likely
    and Blowing
    Snow

  • Tuesday Night

    Tuesday Night: Snow, mainly after 11pm. Patchy blowing snow after 8pm. Low around 20. Southwest wind 17 to 20 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.

    Low: 20 °F

    Snow and
    Patchy
    Blowing Snow

  • Wednesday

    Wednesday: Snow. High near 24. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    High: 24 °F

    Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 0. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 0 °F

    Snow

  • Thursday

    Thursday: Snow likely. Mostly cloudy, with a high near 11.

    High: 11 °F

    Snow Likely

  • Thursday Night

    Thursday Night: Snow likely, mainly after 11pm. Mostly cloudy, with a low around 4.

    Low: 4 °F

    Snow Likely

Detailed Forecast

Tonight
Snow likely. The snow could be heavy at times. Widespread blowing snow. Cloudy, with a low around 22. Windy, with a west southwest wind 36 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 60%. Total nighttime snow accumulation of 4 to 8 inches possible.
Monday
Snow likely before 7am, then snow after 8am. The snow could be heavy at times. Widespread blowing snow after 8am. High near 31. Windy, with a southwest wind 28 to 36 mph, with gusts as high as 49 mph. Chance of precipitation is 90%. New snow accumulation of 6 to 10 inches possible.
Monday Night
Snow. The snow could be heavy at times. Widespread blowing snow. Low around 21. Windy, with a southwest wind 31 to 41 mph, with gusts as high as 55 mph. Chance of precipitation is 100%. New snow accumulation of 10 to 14 inches possible.
Tuesday
Snow likely, mainly before 11am. Widespread blowing snow, mainly before 11am. Mostly cloudy, with a high near 29. Windy, with a west southwest wind 36 to 41 mph decreasing to 24 to 29 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Snow, mainly after 11pm. Patchy blowing snow after 8pm. Low around 20. Southwest wind 17 to 20 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New snow accumulation of 3 to 5 inches possible.
Wednesday
Snow. High near 24. Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.
Wednesday Night
Snow. Low around 0. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Thursday
Snow likely. Mostly cloudy, with a high near 11.
Thursday Night
Snow likely, mainly after 11pm. Mostly cloudy, with a low around 4.
Friday
Snow likely. Mostly cloudy, with a high near 22.
Friday Night
Snow likely. Cloudy, with a low around 19.
Saturday
A chance of snow. Mostly cloudy, with a high near 25.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 20.
Sunday
A chance of snow. Mostly cloudy, with a high near 24.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
16 Miles WSW St Mary MT
 48.69°N 113.78°W (Elev. 8153 ft)
Last Update:
1:01 pm MST Dec 7, 2025
Forecast Valid:
10pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
Forecast Discussion
 
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Additional Resources

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