Areas of Excessive Rainfall and Severe Thunderstorms; Fire Weather Concerns in the Northern Plains and Four Corners Region

Widespread showers and thunderstorms may bring areas of flash flooding across much of the Southern Plains into the Gulf Coast region and the upper Ohio River Valley into the Mid-Atlantic. A large Pacific storm will bring widespread rain, gusty winds, and mountain snow to California and the Great Basin. Fire weather concerns expected in the Northern Plains and the Four Corners region. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

unknown precip

55°F

13°C

Humidity 99%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 55°F (13°C)
Visibility NA
Last update 26 May 09:15 PM MDT
Extended Forecast for

Garrison MT

  • Tonight

    Tonight: A 50 percent chance of rain, mainly before 11pm.  Areas of fog after midnight.  Otherwise, mostly cloudy, with a low around 43. Calm wind.

    Low: 43 °F

    Chance Rain
    then Areas
    Fog

  • Wednesday

    Wednesday: A 50 percent chance of showers and thunderstorms after noon.  Areas of fog before 9am.  Otherwise, partly sunny, with a high near 80. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 80 °F

    Areas Fog
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and 11pm.  Patchy fog between 2am and 5am.  Otherwise, partly cloudy, with a low around 45. Calm wind.  Chance of precipitation is 40%.

    Low: 45 °F

    Chance
    Showers then
    Patchy Fog

  • Thursday

    Thursday: A chance of rain between noon and 3pm, then a chance of showers and thunderstorms after 3pm.  Mostly sunny, with a high near 87. Calm wind becoming east southeast around 6 mph in the afternoon.  Chance of precipitation is 30%.

    High: 87 °F

    Sunny then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of rain before midnight.  Partly cloudy, with a low around 47. East wind 5 to 7 mph becoming calm  in the evening.

    Low: 47 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight.  Mostly cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Showers
    Likely

  • Saturday

    Saturday: Rain likely, then showers and possibly a thunderstorm after noon.  Mostly cloudy, with a high near 64.

    High: 64 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm before midnight, then rain likely after midnight.  Mostly cloudy, with a low around 38.

    Low: 38 °F

    Showers

Detailed Forecast

Tonight
A 50 percent chance of rain, mainly before 11pm. Areas of fog after midnight. Otherwise, mostly cloudy, with a low around 43. Calm wind.
Wednesday
A 50 percent chance of showers and thunderstorms after noon. Areas of fog before 9am. Otherwise, partly sunny, with a high near 80. Calm wind becoming north northeast around 5 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of rain between 9pm and 11pm. Patchy fog between 2am and 5am. Otherwise, partly cloudy, with a low around 45. Calm wind. Chance of precipitation is 40%.
Thursday
A chance of rain between noon and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 87. Calm wind becoming east southeast around 6 mph in the afternoon. Chance of precipitation is 30%.
Thursday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 47. East wind 5 to 7 mph becoming calm in the evening.
Friday
A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 82.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of rain after midnight. Mostly cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Rain likely, then showers and possibly a thunderstorm after noon. Mostly cloudy, with a high near 64.
Saturday Night
Showers and possibly a thunderstorm before midnight, then rain likely after midnight. Mostly cloudy, with a low around 38.
Sunday
Rain likely before noon, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 62.
Sunday Night
A chance of rain and thunderstorms. Mostly cloudy, with a low around 37.
Monday
A chance of rain and thunderstorms. Partly sunny, with a high near 67.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 38.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 73.
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ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.52°N 112.78°W (Elev. 4396 ft)
2:01 pm MDT May 26, 2026
9pm MDT May 26, 2026-6pm MDT Jun 2, 2026
 
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Additional Resources

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