Severe Thunderstorms and Heavy Rain in the Mid-Atlantic; Heat Persists Across the South

Scattered severe thunderstorms and excessive rainfall are possible into the night in the Mid Atlantic, and heavy rain will shift to Virginia and the Carolinas on Friday. Severe thunderstorms are also possible in the Central Plains into the Upper MS Valley and the Deep South tonight. Dangerous heat persists across the Southern Plains and Lower MS Valley and heat will expand into the Southwest. Read More >

Current conditions at

Rockwall Municipal Airport (KF46)

Lat: 32.93°NLon: 96.43°WElev: 564ft.

Fair

88°F

31°C

Humidity 47%
Wind Speed SW 9 mph
Barometer 29.99 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 21 Aug 2:35 am CDT
Extended Forecast for

Mc Lendon-Chisholm TX

Extreme Heat Warning August 21, 02:47am until August 21, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 21, 02:47am until August 21, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Overnight

    Low: 79 °F

    Mostly Clear

  • Friday

    Friday: A 10 percent chance of showers and thunderstorms after 4pm.  Sunny and hot, with a high near 106. Heat index values as high as 110. West southwest wind around 5 mph.

    High: 106 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 20 percent chance of showers and thunderstorms before 10pm.  Partly cloudy, with a low around 78. South wind around 5 mph.

    Low: 78 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny and hot, with a high near 107. Heat index values as high as 111. Southeast wind around 5 mph becoming southwest in the morning.

    High: 107 °F

    Hot

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 78. South wind 5 to 10 mph.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 106. South southwest wind 5 to 10 mph.

    High: 106 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 80. South wind around 10 mph.

    Low: 80 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 105. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 105 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 79. South southwest wind around 5 mph.
Friday
A 10 percent chance of showers and thunderstorms after 4pm. Sunny and hot, with a high near 106. Heat index values as high as 110. West southwest wind around 5 mph.
Friday Night
A 20 percent chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 78. South wind around 5 mph.
Saturday
Mostly sunny and hot, with a high near 107. Heat index values as high as 111. Southeast wind around 5 mph becoming southwest in the morning.
Saturday Night
Partly cloudy, with a low around 78. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 106. South southwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 80. South wind around 10 mph.
Monday
Sunny and hot, with a high near 105. South southwest wind 10 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 79. South wind around 15 mph, with gusts as high as 20 mph.
Tuesday
Sunny and hot, with a high near 106.
Tuesday Night
Mostly clear, with a low around 79.
Wednesday
A 20 percent chance of showers. Mostly sunny and hot, with a high near 104.
Wednesday Night
Mostly clear, with a low around 75.
Thursday
A 20 percent chance of showers and thunderstorms. Sunny and hot, with a high near 101.
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ABOUT THIS FORECAST

 
Point Forecast:
Mc Lendon-Chisholm TX
 32.85°N 96.4°W (Elev. 548 ft)
1:26 am CDT Aug 21, 2026
2am CDT Aug 21, 2026-6pm CDT Aug 27, 2026
 
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