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

Winter Storm Bringing Widespread Hazardous Weather to the Eastern U.S.

A rapidly-intensifying winter storm continues to bring heavy snow, high winds, and blizzard conditions over the Upper Midwest and Great Lakes through today. An Arctic front will lead in a period of gusty to high winds and sharply colder temperatures over the entire eastern U.S. Heavy lake effect snow is then expected from Lakes Erie and Ontario through New Year's Day. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

31°F

-1°C

Humidity 50%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 14°F (-10°C)
Visibility NA
Wind Chill27°F (-3°C)
Last update 29 Dec 03:30 PM MST
Extended Forecast for

12 Miles W Marysville MT

  • Tonight

    Tonight: Patchy blowing snow after 8pm. Mostly cloudy, with a low around 18. Breezy, with a west wind 20 to 22 mph.

    Low: 18 °F

    Patchy
    Blowing Snow
    and Breezy

  • Tuesday

    Tuesday: Patchy blowing snow before 8am. Mostly sunny, with a high near 26. West wind 13 to 17 mph, with gusts as high as 20 mph.

    High: 26 °F

    Patchy
    Blowing Snow
    then Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24. West southwest wind 16 to 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 30. West southwest wind 11 to 18 mph, with gusts as high as 21 mph.

    High: 30 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23. West southwest wind 13 to 17 mph.

    Low: 23 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of snow. Mostly cloudy, with a high near 29.

    High: 29 °F

    Slight Chance
    Snow

  • Friday Night

    Friday Night: A chance of snow, mainly after 11pm. Mostly cloudy, with a low around 25. Breezy.

    Low: 25 °F

    Chance Snow
    and Breezy

Detailed Forecast

Tonight
Patchy blowing snow after 8pm. Mostly cloudy, with a low around 18. Breezy, with a west wind 20 to 22 mph.
Tuesday
Patchy blowing snow before 8am. Mostly sunny, with a high near 26. West wind 13 to 17 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 24. West southwest wind 16 to 20 mph.
Wednesday
Mostly sunny, with a high near 30. West southwest wind 11 to 18 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly cloudy, with a low around 23. West southwest wind 13 to 17 mph.
New Year's Day
Mostly cloudy, with a high near 27.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
A slight chance of snow. Mostly cloudy, with a high near 29.
Friday Night
A chance of snow, mainly after 11pm. Mostly cloudy, with a low around 25. Breezy.
Saturday
A chance of snow. Mostly cloudy, with a high near 28. Breezy.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 22.
Sunday
A slight chance of snow. Partly sunny, with a high near 25. Breezy.
Sunday Night
A slight chance of snow. Partly cloudy, with a low around 20.
Monday
A chance of snow. Partly sunny, with a high near 26.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
Last Update:
1:01 pm MST Dec 29, 2025
Forecast Valid:
3pm MST Dec 29, 2025-6pm MST Jan 5, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation