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 >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

Lat: 46.52361°NLon: 112.80843°WElev: 4327.0ft.

NA

37°F

3°C

Humidity 71%
Wind Speed ENE 2 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Last update 07 Dec 03:00 PM MST
Extended Forecast for

12 Miles W Marysville MT

  • This Afternoon

    This Afternoon: Snow likely, mainly after 5pm. The snow could be heavy at times.  Widespread blowing snow, mainly after 4pm. Mostly cloudy, with a high near 27. Breezy, with a west southwest wind around 22 mph, with gusts as high as 31 mph.  Chance of precipitation is 60%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 27 °F

    Heavy Snow
    and Blowing
    Snow

  • Tonight

    Tonight: Snow likely, mainly after 5am. The snow could be heavy at times.  Widespread blowing snow before 11pm, then widespread blowing snow after midnight. Cloudy, with a low around 24. Windy, with a west wind 30 to 35 mph increasing to 39 to 44 mph after midnight. Winds could gust as high as 60 mph.  Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.

    Low: 24 °F

    Heavy Snow
    and Blowing
    Snow

  • Monday

    Monday: Snow likely before 7am, then snow likely after 8am.  Widespread blowing snow, mainly between 8am and 1pm. Cloudy, with a high near 32. Windy, with a west southwest wind 36 to 41 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 55 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 32 °F

    Snow Likely
    and Blowing
    Snow

  • Monday Night

    Monday Night: Snow.  Widespread blowing snow, mainly after 8pm. Low around 25. Windy, with a west southwest wind 30 to 35 mph increasing to 42 to 47 mph in the evening. Winds could gust as high as 65 mph.  Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 25 °F

    Snow and
    Blowing Snow

  • Tuesday

    Tuesday: Snow, mainly before 11am.  Widespread blowing snow, mainly before 11am. High near 34. Windy, with a west wind 41 to 46 mph decreasing to 32 to 37 mph in the afternoon. Winds could gust as high as 65 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Snow and
    Blowing Snow

  • Tuesday Night

    Tuesday Night: Snow. The snow could be heavy at times.  Patchy blowing snow. Low around 24. Breezy.  Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

    Low: 24 °F

    Heavy Snow
    and Patchy
    Blowing Snow

  • Wednesday

    Wednesday: Snow. The snow could be heavy at times.  Areas of blowing snow. High near 29. Breezy.  Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    High: 29 °F

    Heavy Snow
    and Areas
    Blowing Snow

  • Wednesday Night

    Wednesday Night: Snow.  Patchy blowing snow. Mostly cloudy, with a low around 12. Breezy.

    Low: 12 °F

    Snow and
    Patchy
    Blowing Snow

  • Thursday

    Thursday: Snow.  Areas of blowing snow before 11am. Mostly cloudy, with a high near 15. Breezy.

    High: 15 °F

    Snow and
    Areas Blowing
    Snow

Detailed Forecast

This Afternoon
Snow likely, mainly after 5pm. The snow could be heavy at times. Widespread blowing snow, mainly after 4pm. Mostly cloudy, with a high near 27. Breezy, with a west southwest wind around 22 mph, with gusts as high as 31 mph. Chance of precipitation is 60%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Snow likely, mainly after 5am. The snow could be heavy at times. Widespread blowing snow before 11pm, then widespread blowing snow after midnight. Cloudy, with a low around 24. Windy, with a west wind 30 to 35 mph increasing to 39 to 44 mph after midnight. Winds could gust as high as 60 mph. Chance of precipitation is 60%. New snow accumulation of 2 to 4 inches possible.
Monday
Snow likely before 7am, then snow likely after 8am. Widespread blowing snow, mainly between 8am and 1pm. Cloudy, with a high near 32. Windy, with a west southwest wind 36 to 41 mph decreasing to 30 to 35 mph in the afternoon. Winds could gust as high as 55 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Monday Night
Snow. Widespread blowing snow, mainly after 8pm. Low around 25. Windy, with a west southwest wind 30 to 35 mph increasing to 42 to 47 mph in the evening. Winds could gust as high as 65 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Snow, mainly before 11am. Widespread blowing snow, mainly before 11am. High near 34. Windy, with a west wind 41 to 46 mph decreasing to 32 to 37 mph in the afternoon. Winds could gust as high as 65 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Tuesday Night
Snow. The snow could be heavy at times. Patchy blowing snow. Low around 24. Breezy. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
Wednesday
Snow. The snow could be heavy at times. Areas of blowing snow. High near 29. Breezy. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Wednesday Night
Snow. Patchy blowing snow. Mostly cloudy, with a low around 12. Breezy.
Thursday
Snow. Areas of blowing snow before 11am. Mostly cloudy, with a high near 15. Breezy.
Thursday Night
Snow likely. Cloudy, with a low around 10.
Friday
A chance of snow. Mostly cloudy, with a high near 25.
Friday Night
A chance of snow. Patchy blowing snow. Mostly cloudy, with a low around 22. Breezy.
Saturday
A chance of snow. Patchy blowing snow. Partly sunny, with a high near 27. Breezy.
Saturday Night
A chance of snow. Patchy blowing snow. Mostly cloudy, with a low around 21. Breezy.
Sunday
A chance of snow. Partly sunny, with a high near 24. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
1:01 pm MST Dec 7, 2025
3pm MST Dec 7, 2025-6pm MST Dec 14, 2025
 
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Additional Resources

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