Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Current conditions at

KNOWLTON (KTFM8)

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

NA

92°F

33°C

Humidity 21%
Wind Speed ESE 6 MPH
Barometer NA
Dewpoint 47°F (8°C)
Visibility NA
Heat Index88°F (31°C)
Last update 27 Aug 01:40 PM MDT
Extended Forecast for

Ismay MT

  • This Afternoon

    This Afternoon: Sunny and hot, with a high near 95. East southeast wind around 10 mph.

    High: 95 °F

    Hot

  • Tonight

    Tonight: Increasing clouds, with a low around 66. East southeast wind 6 to 14 mph.

    Low: 66 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny and hot, with a high near 93. South southeast wind around 7 mph becoming north northwest in the afternoon.

    High: 93 °F

    Hot

  • Friday Night

    Friday Night: A slight chance of showers and thunderstorms between 7pm and 8pm.  Mostly cloudy, with a low around 65. North northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 20%.

    Low: 65 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of showers after noon.  Mostly cloudy, with a high near 87. Calm wind becoming north northwest 5 to 7 mph in the afternoon.

    High: 87 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm  after midnight.

    Low: 57 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Sunday

    Sunday: A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon.  Partly sunny, with a high near 84. Light and variable wind becoming west 6 to 11 mph in the morning.  Chance of precipitation is 60%.

    High: 84 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: A 20 percent chance of showers before midnight.  Mostly clear, with a low around 51. West northwest wind 8 to 13 mph becoming light and variable  after midnight.

    Low: 51 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84. Light west southwest wind becoming west 6 to 11 mph in the morning.

    High: 84 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 95. East southeast wind around 10 mph.
Tonight
Increasing clouds, with a low around 66. East southeast wind 6 to 14 mph.
Friday
Partly sunny and hot, with a high near 93. South southeast wind around 7 mph becoming north northwest in the afternoon.
Friday Night
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy, with a low around 65. North northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Saturday
A 40 percent chance of showers after noon. Mostly cloudy, with a high near 87. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 57. North wind 5 to 8 mph becoming calm after midnight.
Sunday
A chance of showers before 9am, then a chance of showers and thunderstorms between 9am and noon, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 84. Light and variable wind becoming west 6 to 11 mph in the morning. Chance of precipitation is 60%.
Sunday Night
A 20 percent chance of showers before midnight. Mostly clear, with a low around 51. West northwest wind 8 to 13 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 84. Light west southwest wind becoming west 6 to 11 mph in the morning.
Monday Night
Mostly clear, with a low around 54. West northwest wind 5 to 9 mph becoming light and variable after midnight.
Tuesday
A 20 percent chance of showers. Mostly sunny, with a high near 88. Light southeast wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Partly cloudy, with a low around 57. East southeast wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 89. Light and variable wind becoming west northwest 5 to 9 mph in the morning.
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ABOUT THIS FORECAST

 
Point Forecast:
Ismay MT
 46.5°N 104.81°W (Elev. 2572 ft)
12:32 pm MDT Aug 27, 2026
2pm MDT Aug 27, 2026-6pm MDT Sep 2, 2026
 
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Additional Resources

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