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

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Partly Cloudy

85°F

29°C

Humidity 68%
Wind Speed SE 8 mph
Barometer 30.01 in (1015.6 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index92°F (33°C)
Last update 18 Aug 12:53 am CDT
Extended Forecast for

Arkoma OK

Extreme Heat Warning August 18, 01:00pm until August 19, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms before 4am.  Mostly clear, with a low around 77. East wind around 5 mph.

    Low: 77 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: Sunny and hot, with a high near 104. Heat index values as high as 110. East wind around 5 mph becoming calm  in the morning.

    High: 104 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 79. Southeast wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 107. Heat index values as high as 110. Light and variable wind becoming southwest 5 to 10 mph in the morning.

    High: 107 °F

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 79. South wind 5 to 10 mph.

    Low: 79 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 102. Calm wind becoming west around 5 mph in the morning.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. Northwest wind around 5 mph becoming northeast after midnight.

    Low: 76 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 102. East wind around 5 mph.

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. Northeast wind around 5 mph becoming calm  after midnight.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms before 4am. Mostly clear, with a low around 77. East wind around 5 mph.
Tuesday
Sunny and hot, with a high near 104. Heat index values as high as 110. East wind around 5 mph becoming calm in the morning.
Tuesday Night
Mostly clear, with a low around 79. Southeast wind around 5 mph.
Wednesday
Sunny and hot, with a high near 107. Heat index values as high as 110. Light and variable wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 79. South wind 5 to 10 mph.
Thursday
Mostly sunny and hot, with a high near 102. Calm wind becoming west around 5 mph in the morning.
Thursday Night
Mostly clear, with a low around 76. Northwest wind around 5 mph becoming northeast after midnight.
Friday
Sunny and hot, with a high near 102. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 76. Northeast wind around 5 mph becoming calm after midnight.
Saturday
Sunny and hot, with a high near 102. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 76. East wind around 5 mph becoming calm after midnight.
Sunday
Sunny and hot, with a high near 103. East wind 5 to 10 mph becoming south in the afternoon.
Sunday Night
Mostly clear, with a low around 77. East wind around 10 mph.
Monday
Sunny and hot, with a high near 103. East wind around 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
Arkoma OK
 35.34°N 94.45°W
1:01 am CDT Aug 18, 2026
1am CDT Aug 18, 2026-6pm CDT Aug 24, 2026
 
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Additional Resources

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