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

GREENFIELDS (GFMT)

Lat: 47.65833°NLon: 111.8125°WElev: 3820.0ft.

NA

79°F

26°C

Humidity 38%
Wind Speed NNE 3 MPH
Barometer NA
Dewpoint 52°F (11°C)
Visibility NA
Heat Index79°F (26°C)
Last update 17 Aug 06:00 PM MDT
Extended Forecast for

Simms MT

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before midnight.  Patchy smoke after 9pm. Partly cloudy, with a low around 52. North northwest wind 5 to 9 mph becoming calm  in the evening.

    Low: 52 °F

    Slight Chance
    T-storms then
    Patchy Smoke

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms between 2pm and 5pm.  Patchy smoke. Mostly sunny, with a high near 83. Light west southwest wind increasing to 5 to 9 mph in the morning.  Chance of precipitation is 20%.

    High: 83 °F

    Patchy Smoke
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms between 9pm and 10pm.  Patchy smoke. Partly cloudy, with a low around 52. West southwest wind 5 to 7 mph.  Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    T-storms then
    Patchy Smoke

  • Wednesday

    Wednesday: Patchy smoke before 7am. Sunny, with a high near 86. Southwest wind around 8 mph.

    High: 86 °F

    Patchy Smoke
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53. West southwest wind 3 to 8 mph.

    Low: 53 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 84. West southwest wind 5 to 8 mph becoming north northeast in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. Northeast wind 5 to 10 mph becoming light and variable  after midnight.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 84. Calm wind becoming east northeast 5 to 7 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers.  Mostly cloudy, with a low around 57.

    Low: 57 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before midnight. Patchy smoke after 9pm. Partly cloudy, with a low around 52. North northwest wind 5 to 9 mph becoming calm in the evening.
Tuesday
A slight chance of showers and thunderstorms between 2pm and 5pm. Patchy smoke. Mostly sunny, with a high near 83. Light west southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers and thunderstorms between 9pm and 10pm. Patchy smoke. Partly cloudy, with a low around 52. West southwest wind 5 to 7 mph. Chance of precipitation is 20%.
Wednesday
Patchy smoke before 7am. Sunny, with a high near 86. Southwest wind around 8 mph.
Wednesday Night
Mostly clear, with a low around 53. West southwest wind 3 to 8 mph.
Thursday
Sunny, with a high near 84. West southwest wind 5 to 8 mph becoming north northeast in the afternoon.
Thursday Night
Mostly clear, with a low around 54. Northeast wind 5 to 10 mph becoming light and variable after midnight.
Friday
Mostly sunny, with a high near 84. Calm wind becoming east northeast 5 to 7 mph in the afternoon.
Friday Night
A slight chance of showers. Mostly cloudy, with a low around 57.
Saturday
A chance of showers after noon. Partly sunny, with a high near 87.
Saturday Night
A chance of showers. Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 82.
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ABOUT THIS FORECAST

 
Point Forecast:
Simms MT
 47.48°N 111.93°W (Elev. 3665 ft)
12:32 pm MDT Aug 17, 2026
6pm MDT Aug 17, 2026-6pm MDT Aug 24, 2026
 
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Additional Resources

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