Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

22°F

-6°C

Humidity 88%
Wind Speed E 0 MPH
Barometer NA
Dewpoint 19°F (-7°C)
Visibility NA
Last update 19 Apr 05:30 AM MDT
Extended Forecast for

12 Miles W Marysville MT

  • Today

    Today: Sunny, with a high near 47. West southwest wind 14 to 16 mph, with gusts as high as 22 mph.

    High: 47 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. West southwest wind 11 to 17 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 54. West southwest wind 13 to 16 mph, with gusts as high as 23 mph.

    High: 54 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. Southwest wind 11 to 18 mph, with gusts as high as 23 mph.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 59. South southwest wind 11 to 20 mph, with gusts as high as 23 mph.

    High: 59 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain and snow before noon, then rain and snow showers. Some thunder is also possible.  Snow level 9000 feet lowering to 8300 feet in the afternoon . High near 48. Breezy.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    High: 48 °F

    Chance
    Rain/Snow
    then
    Rain/Snow and
    Breezy

  • Wednesday Night

    Wednesday Night: Rain and snow showers, becoming all snow after midnight. The snow could be heavy at times. Some thunder is also possible.  Cloudy, with a low around 22. Breezy.

    Low: 22 °F

    Rain/Snow and
    Breezy then
    Heavy Snow
    and Blustery

  • Thursday

    Thursday: Snow.  Mostly cloudy, with a high near 26.

    High: 26 °F

    Snow

Detailed Forecast

Today
Sunny, with a high near 47. West southwest wind 14 to 16 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, with a low around 37. West southwest wind 11 to 17 mph, with gusts as high as 21 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 54. West southwest wind 13 to 16 mph, with gusts as high as 23 mph.
Monday Night
Partly cloudy, with a low around 38. Southwest wind 11 to 18 mph, with gusts as high as 23 mph.
Tuesday
Mostly sunny, with a high near 59. South southwest wind 11 to 20 mph, with gusts as high as 23 mph.
Tuesday Night
Mostly cloudy, with a low around 40.
Wednesday
A chance of rain and snow before noon, then rain and snow showers. Some thunder is also possible. Snow level 9000 feet lowering to 8300 feet in the afternoon . High near 48. Breezy. Chance of precipitation is 90%. Little or no snow accumulation expected.
Wednesday Night
Rain and snow showers, becoming all snow after midnight. The snow could be heavy at times. Some thunder is also possible. Cloudy, with a low around 22. Breezy.
Thursday
Snow. Mostly cloudy, with a high near 26.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 18.
Friday
Snow likely. Partly sunny, with a high near 26.
Friday Night
A chance of snow. Mostly cloudy, with a low around 18.
Saturday
A chance of snow. Partly sunny, with a high near 27.
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ABOUT THIS FORECAST

 
Point Forecast:
12 Miles W Marysville MT
 46.77°N 112.54°W (Elev. 8199 ft)
2:00 am MDT Apr 19, 2026
5am MDT Apr 19, 2026-6pm MDT Apr 25, 2026
 
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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