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

KNOWLTON (KTFM8)

Lat: 46.30739°NLon: 105.02978°WElev: 3320.0ft.

NA

63°F

17°C

Humidity 83%
Wind Speed SE 4 MPH
Barometer NA
Dewpoint 58°F (14°C)
Visibility NA
Last update 17 Aug 07:40 PM MDT
Extended Forecast for

Ismay MT

  • Tonight

    Tonight: A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am.  Mostly cloudy, with a low around 57. Light and variable wind.  Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am.  Mostly cloudy, with a low around 57. Light and variable wind.  Chance of precipitation is 30%.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 88. Light and variable wind becoming west 5 to 8 mph in the morning.

    High: 88 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm  in the evening.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 92. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 92 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59. North northwest wind 5 to 9 mph becoming calm  after midnight.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. Calm wind becoming north northeast 5 to 8 mph in the morning.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. North northeast wind 7 to 9 mph becoming east southeast after midnight.

    Low: 59 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Mostly cloudy, with a low around 57. Light and variable wind. Chance of precipitation is 50%.
Tuesday
Sunny, with a high near 84. Calm wind becoming north northwest around 6 mph in the afternoon.
Tuesday Night
A chance of showers and thunderstorms between midnight and 3am, then a chance of showers after 3am. Mostly cloudy, with a low around 57. Light and variable wind. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 88. Light and variable wind becoming west 5 to 8 mph in the morning.
Wednesday Night
Mostly clear, with a low around 59. Northwest wind 5 to 8 mph becoming calm in the evening.
Thursday
Sunny and hot, with a high near 92. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 59. North northwest wind 5 to 9 mph becoming calm after midnight.
Friday
Sunny, with a high near 88. Calm wind becoming north northeast 5 to 8 mph in the morning.
Friday Night
Partly cloudy, with a low around 59. North northeast wind 7 to 9 mph becoming east southeast after midnight.
Saturday
Partly sunny, with a high near 88. Southeast wind 8 to 14 mph.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Southeast wind 11 to 16 mph.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 90. South southeast wind 9 to 11 mph becoming west northwest in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61. North northwest wind 5 to 10 mph becoming light and variable after midnight.
Monday
Mostly sunny, with a high near 89. Calm wind becoming north northwest 5 to 7 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Ismay MT
 46.5°N 104.81°W (Elev. 2572 ft)
8:06 pm MDT Aug 17, 2026
8pm MDT Aug 17, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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