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

East Coast Storm; Heavy Rain and Flooding in the Southwest U.S.; Typhoon Remnants Impacting Alaska

A coastal storm continues to bring heavy rain, coastal flooding, high surf, dangerous rip currents, and gusty winds to the East Coast into early Tuesday. A heavy rain and flash flood risk continues for the Southwest/Four Corners region with lingering tropical moisture through Monday. Typhoon remnants are causing strong winds, heavy rain, and coastal flooding across western Alaska through Monday. Read More >

Hazardous Weather Conditions

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

unknown precip

31°F

-1°C

Humidity 87%
Wind Speed E 13 MPH
Barometer NA
Dewpoint 28°F (-2°C)
Visibility NA
Wind Chill21°F (-6°C)
Last update 12 Oct 08:45 PM MDT
Extended Forecast for

Garrison MT

Winter Weather Advisory October 12, 09:09pm until October 13, 12:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory October 12, 09:09pm until October 13, 12:00pm

    NOW until 12:00pm Mon

    Winter Weather Advisory

  • Tonight

    Low: 21 °F

    Snow

  • Columbus Day

    Columbus Day: Snow likely before 2pm, then a slight chance of snow after 3pm. Patchy blowing snow between 10am and 2pm. Mostly cloudy, with a high near 39. East northeast wind 15 to 21 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 39 °F

    Snow Likely
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 21. East northeast wind 8 to 17 mph, with gusts as high as 26 mph. Little or no snow accumulation expected.

    Low: 21 °F

    Mostly Cloudy
    then Chance
    Snow

  • Tuesday

    Tuesday: A chance of snow before 9am, then a chance of rain and snow between 9am and noon, then a chance of rain after noon. Patchy fog before noon. Snow level rising to 7300 feet in the afternoon. Otherwise, partly sunny, with a high near 49. East wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.

    High: 49 °F

    Chance
    Rain/Snow and
    Patchy Fog
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: A chance of rain before midnight, then a chance of rain and snow. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 25. East northeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 50%. Little or no snow accumulation expected.

    Low: 25 °F

    Chance
    Rain/Snow and
    Patchy Fog

  • Wednesday

    Wednesday: Rain and snow likely before 9am, then rain. Patchy fog before 3pm. High near 47. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 47 °F

    Rain/Snow
    Likely and
    Patchy Fog
    then Rain and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Rain likely before 3am, then rain and snow likely. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 27. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 27 °F

    Rain/Snow
    Likely and
    Patchy Fog

  • Thursday

    Thursday: A chance of rain and snow before 9am, then a chance of rain. Patchy fog before noon. Otherwise, partly sunny, with a high near 49.

    High: 49 °F

    Chance
    Rain/Snow and
    Patchy Fog
    then Chance
    Rain

Detailed Forecast

Tonight
Snow, mainly before 3am. Low around 21. East northeast wind 14 to 18 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. Total nighttime snow accumulation of around an inch possible.
Columbus Day
Snow likely before 2pm, then a slight chance of snow after 3pm. Patchy blowing snow between 10am and 2pm. Mostly cloudy, with a high near 39. East northeast wind 15 to 21 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 21. East northeast wind 8 to 17 mph, with gusts as high as 26 mph. Little or no snow accumulation expected.
Tuesday
A chance of snow before 9am, then a chance of rain and snow between 9am and noon, then a chance of rain after noon. Patchy fog before noon. Snow level rising to 7300 feet in the afternoon. Otherwise, partly sunny, with a high near 49. East wind 3 to 6 mph. Chance of precipitation is 40%. Little or no snow accumulation expected.
Tuesday Night
A chance of rain before midnight, then a chance of rain and snow. Patchy fog after 9pm. Otherwise, mostly cloudy, with a low around 25. East northeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday
Rain and snow likely before 9am, then rain. Patchy fog before 3pm. High near 47. Chance of precipitation is 80%. Little or no snow accumulation expected.
Wednesday Night
Rain likely before 3am, then rain and snow likely. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 27. Chance of precipitation is 70%. Little or no snow accumulation expected.
Thursday
A chance of rain and snow before 9am, then a chance of rain. Patchy fog before noon. Otherwise, partly sunny, with a high near 49.
Thursday Night
A chance of rain before midnight, then a chance of rain and snow. Partly cloudy, with a low around 25.
Friday
A chance of rain and snow before 9am, then a chance of rain. Patchy fog before 9am. Otherwise, partly sunny, with a high near 52.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 24.
Saturday
A slight chance of rain and snow. Patchy fog. Snow level 5300 feet rising to 6800 feet in the afternoon. Otherwise, mostly sunny, with a high near 54.
Saturday Night
A slight chance of rain and snow. Patchy fog. Otherwise, partly cloudy, with a low around 26.
Sunday
A chance of rain and snow. Patchy fog. Otherwise, partly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
Last Update:
2:30 pm MDT Oct 12, 2025
Forecast Valid:
9pm MDT Oct 12, 2025-6pm MDT Oct 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation