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

39°F

4°C

Humidity 94%
Wind Speed SE 1 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 07 Dec 01:12 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

  • This Afternoon

    This Afternoon: Snow, mainly after 4pm. The snow could be heavy at times. Widespread blowing snow, mainly between 4pm and 5pm. High near 27. Breezy, with a southwest wind 21 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 3 to 5 inches possible.

    High: 27 °F

    Heavy Snow
    and Blowing
    Snow

  • Tonight

    Tonight: Snow likely. The snow could be heavy at times. Widespread blowing snow. Cloudy, with a low around 22. Windy, with a southwest wind 30 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 70%. New 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. 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. Cloudy, with a low around 0.

    Low: 0 °F

    Snow

  • Thursday

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

    High: 11 °F

    Snow Likely

Detailed Forecast

This Afternoon
Snow, mainly after 4pm. The snow could be heavy at times. Widespread blowing snow, mainly between 4pm and 5pm. High near 27. Breezy, with a southwest wind 21 to 23 mph, with gusts as high as 32 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 3 to 5 inches possible.
Tonight
Snow likely. The snow could be heavy at times. Widespread blowing snow. Cloudy, with a low around 22. Windy, with a southwest wind 30 to 38 mph, with gusts as high as 55 mph. Chance of precipitation is 70%. New 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. 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. Cloudy, with a low around 0.
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.
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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:
2pm MST Dec 7, 2025-6pm MST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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