Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

56°F

13°C

Humidity 67%
Wind Speed SE 0 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Last update 18 Aug 02:15 AM MDT
Extended Forecast for

Garrison MT

  • Overnight

    Overnight: Mostly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after noon.  Partly sunny, with a high near 80. Light and variable wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph.

    High: 80 °F

    Partly Sunny
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. West northwest wind 5 to 10 mph becoming light and variable  after midnight. Winds could gust as high as 18 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46. Northwest wind 5 to 7 mph becoming calm  in the evening. Winds could gust as high as 18 mph.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before midnight.  Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 46. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 80. Light and variable wind becoming west northwest 6 to 11 mph in the afternoon. Winds could gust as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 45. West northwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Wednesday
Sunny, with a high near 83. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 46. Northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 18 mph.
Thursday
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 49.
Friday
Mostly sunny, with a high near 88.
Friday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 51.
Saturday
A slight chance of rain, then a chance of showers and thunderstorms after noon. Partly sunny, with a high near 84.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 46.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Garrison MT
 46.51°N 112.81°W (Elev. 4380 ft)
2:01 am MDT Aug 18, 2026
2am MDT Aug 18, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

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