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Flooding Risks from Tropical Moisture Across the Southeast and Southwest

Tropical moisture from Isaias and Rachel will impact portions of the Southeast and Southwest this weekend. Flash flooding, strong winds and even a threat for severe thunderstorms and tornadoes are possible. Meanwhile, strong winds and dry fuels are raising fire weather concerns across the central Great Basin and western High Plains. Across the northern Rockies, first winter storm of the season. Read More >

Hazardous Weather Conditions

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

44°F

7°C

Humidity 62%
Wind Speed NE 1 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 10 Oct 06:30 AM MDT
Extended Forecast for

Garrison MT

Winter Storm Warning October 10, 06:00pm until October 12, 06:00am
Click here for hazard details and duration
Winter Storm Warning

  • Today

    Today: Rain, mainly after 10am. High near 49. Light and variable wind becoming north northeast 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 49 °F

    Rain

  • Tonight

    Tonight: Rain and snow, becoming all snow after 9pm. Patchy blowing snow between 1am and 3am. Low around 21. Northeast wind 8 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 21 °F

    Rain/Snow
    then Snow and
    Patchy
    Blowing Snow

  • Sunday

    Sunday: Snow. High near 36. East northeast wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    High: 36 °F

    Snow

  • Sunday Night

    Sunday Night: Snow. Low around 19. East northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    Low: 19 °F

    Snow

  • Columbus Day

    Columbus Day: A 30 percent chance of snow before noon. Patchy fog before 9am. Snow level rising to 5700 feet in the afternoon. Otherwise, partly sunny, with a high near 41. Calm wind. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance Snow
    and Patchy
    Fog then
    Partly Sunny

  • Monday Night

    Monday Night: Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 18.

    Low: 18 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 2pm. Otherwise, sunny, with a high near 48.

    High: 48 °F

    Areas Fog

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

Detailed Forecast

Today
Rain, mainly after 10am. High near 49. Light and variable wind becoming north northeast 9 to 14 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain and snow, becoming all snow after 9pm. Patchy blowing snow between 1am and 3am. Low around 21. Northeast wind 8 to 18 mph, with gusts as high as 32 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Sunday
Snow. High near 36. East northeast wind 6 to 8 mph, with gusts as high as 22 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Sunday Night
Snow. Low around 19. East northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.
Columbus Day
A 30 percent chance of snow before noon. Patchy fog before 9am. Snow level rising to 5700 feet in the afternoon. Otherwise, partly sunny, with a high near 41. Calm wind. New snow accumulation of less than a half inch possible.
Monday Night
Patchy fog after 8pm. Otherwise, partly cloudy, with a low around 18.
Tuesday
Areas of fog before 2pm. Otherwise, sunny, with a high near 48.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Sunny, with a high near 52.
Wednesday Night
A slight chance of rain before 3am, then a slight chance of rain and snow. Partly cloudy, with a low around 23.
Thursday
A slight chance of rain and snow. Mostly sunny, with a high near 54.
Thursday Night
Partly cloudy, with a low around 23.
Friday
Sunny, with a high near 62.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.54°N 112.81°W (Elev. 4400 ft)
Last Update:
2:01 am MDT Oct 10, 2026
Forecast Valid:
6am MDT Oct 10, 2026-6pm MDT Oct 16, 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