Severe Thunderstorms and Flooding from the Southern Plains to the Great Lakes; Record Heat in the East

Widely scattered severe thunderstorms may produce damaging winds, hail, and flash flooding from the southern Plains into the lower Great Lakes. Elevated to locally critical fire weather conditions will persist across portions of the Southwest and Southern High Plains due to gusty winds and dry conditions. An early-season heatwave will challenge temperature records across the eastern U.S.. Read More >

Current conditions at

Garrison I-90 MP 174.4 (MTGAR)

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

NA

51°F

11°C

Humidity 49%
Wind Speed WNW 10 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 19 May 03:30 PM MDT
Extended Forecast for

7 Miles NW Garrison MT

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms.  Partly sunny, with a high near 62. West wind 8 to 10 mph.

    High: 62 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Partly cloudy, with a low around 31. Northwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 31 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm.  Partly sunny, with a high near 61. Calm wind becoming west northwest 5 to 8 mph in the afternoon.  Chance of precipitation is 60%.

    High: 61 °F

    Partly Sunny
    then Showers
    Likely

  • Wednesday Night

    Wednesday Night: Rain showers before midnight, then rain likely between midnight and 3am, then rain and snow likely after 3am. Some thunder is also possible.  Low around 32. Northwest wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 90%. Little or no snow accumulation expected.

    Low: 32 °F

    Showers then
    Rain/Snow
    Likely

  • Thursday

    Thursday: A 20 percent chance of rain before noon.  Mostly sunny, with a high near 61. Light north wind.

    High: 61 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 62. West wind 8 to 10 mph.
Tonight
Partly cloudy, with a low around 31. Northwest wind 5 to 9 mph becoming calm in the evening.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 61. Calm wind becoming west northwest 5 to 8 mph in the afternoon. Chance of precipitation is 60%.
Wednesday Night
Rain showers before midnight, then rain likely between midnight and 3am, then rain and snow likely after 3am. Some thunder is also possible. Low around 32. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 90%. Little or no snow accumulation expected.
Thursday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 61. Light north wind.
Thursday Night
Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 69.
Friday Night
Partly cloudy, with a low around 36.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 40.
Memorial Day
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 77.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 37.
Tuesday
A chance of rain. Mostly sunny, with a high near 66.
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ABOUT THIS FORECAST

 
Point Forecast:
7 Miles NW Garrison MT
 46.59°N 112.94°W (Elev. 4177 ft)
2:01 pm MDT May 19, 2026
3pm MDT May 19, 2026-6pm MDT May 26, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database