Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

Fort Smith Regional Airport (KFSM)

Lat: 35.33°NLon: 94.37°WElev: 436ft.

Fair

88°F

31°C

Humidity 48%
Wind Speed E 5 mph
Barometer 29.89 in (1011.6 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 18 Aug 11:53 pm CDT
Extended Forecast for

Charleston AR

Extreme Heat Warning August 19, 12:04am until August 19, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 12:04am until August 19, 09:00pm

    NOW until 9:00pm Wed

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 106. Heat index values as high as 111. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 106 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: A 20 percent chance of showers and thunderstorms before 1pm.  Mostly sunny and hot, with a high near 102. Heat index values as high as 110. Calm wind becoming north around 5 mph in the afternoon.

    High: 102 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 71. East wind around 5 mph.

    Low: 71 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 101. East wind around 5 mph.

    High: 101 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 72. East wind around 5 mph.

    Low: 72 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 101 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 75. East wind around 5 mph.
Wednesday
Sunny and hot, with a high near 106. Heat index values as high as 111. Light south wind becoming southwest 5 to 10 mph in the morning.
Wednesday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph.
Thursday
A 20 percent chance of showers and thunderstorms before 1pm. Mostly sunny and hot, with a high near 102. Heat index values as high as 110. Calm wind becoming north around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 71. East wind around 5 mph.
Friday
Sunny and hot, with a high near 101. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 72. East wind around 5 mph.
Saturday
Sunny and hot, with a high near 101. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 73. East wind around 5 mph becoming calm in the evening.
Sunday
Sunny and hot, with a high near 101. East wind 5 to 10 mph becoming southeast in the afternoon.
Sunday Night
A 20 percent chance of showers and thunderstorms. Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Monday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 102. East wind 5 to 10 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 74. Southeast wind 5 to 10 mph.
Tuesday
A 20 percent chance of showers. Sunny and hot, with a high near 102. South wind 5 to 10 mph becoming northwest in the afternoon.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Charleston AR
 35.29°N 94.04°W
11:50 pm CDT Aug 18, 2026
12am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database