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

HARLEM (HRLM)

Lat: 48.54333°NLon: 108.83472°WElev: 2358.0ft.

NA

85°F

29°C

Humidity 31%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Heat Index83°F (28°C)
Last update 17 Aug 07:00 PM MDT
Extended Forecast for

Chinook MT

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 9pm.  Patchy smoke before 10pm. Partly cloudy, with a low around 50. North northwest wind around 6 mph becoming calm  in the evening.

    Low: 50 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 3pm.  Patchy smoke after 4pm. Patchy fog before 9am.  Otherwise, mostly sunny, with a high near 83. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 83 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 8pm.  Patchy smoke. Partly cloudy, with a low around 53. West northwest wind around 5 mph becoming calm  after midnight.

    Low: 53 °F

    Slight Chance
    T-storms then
    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 87. Light west wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.

    High: 87 °F

    Patchy Smoke
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 55. West northwest wind 5 to 10 mph becoming light and variable  in the evening.

    Low: 55 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north northwest 5 to 9 mph in the morning.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. North wind 6 to 11 mph becoming light and variable  after midnight. Winds could gust as high as 18 mph.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86. East southeast wind 5 to 13 mph, with gusts as high as 21 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly before 9pm. Patchy smoke before 10pm. Partly cloudy, with a low around 50. North northwest wind around 6 mph becoming calm in the evening.
Tuesday
A 20 percent chance of showers and thunderstorms after 3pm. Patchy smoke after 4pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 83. Calm wind becoming west southwest around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 8pm. Patchy smoke. Partly cloudy, with a low around 53. West northwest wind around 5 mph becoming calm after midnight.
Wednesday
Patchy smoke before 7am. Sunny, with a high near 87. Light west wind becoming west northwest 6 to 11 mph in the morning. Winds could gust as high as 20 mph.
Wednesday Night
Partly cloudy, with a low around 55. West northwest wind 5 to 10 mph becoming light and variable in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming north northwest 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 54. North wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 18 mph.
Friday
Sunny, with a high near 86. East southeast wind 5 to 13 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 58.
Saturday
A slight chance of showers after noon. Partly sunny, with a high near 87.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Sunday
A slight chance of showers. Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 54.
Monday
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Chinook MT
 48.6°N 109.23°W (Elev. 2408 ft)
12:32 pm MDT Aug 17, 2026
7pm MDT Aug 17, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

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