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

McKinney - McKinney National Airport (KTKI)

Lat: 33.18°NLon: 96.59°WElev: 584ft.

Fair

85°F

29°C

Humidity 53%
Wind Speed S 8 mph
Barometer 29.95 in (1013.1 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 19 Aug 12:53 am CDT
Extended Forecast for

4 Miles W Farmersville TX

Extreme Heat Warning August 19, 12:57am until August 19, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 12:57am until August 19, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Overnight

    Low: 80 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 103. South southwest wind around 10 mph.

    High: 103 °F

    Hot

  • Wednesday Night

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

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, then gradually becoming sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 79. South wind around 5 mph.

    Low: 79 °F

    Mostly Clear

  • Friday

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

    High: 102 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 78. South southeast wind around 5 mph.

    Low: 78 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 102. South wind around 5 mph.

    High: 102 °F

    Hot

Detailed Forecast

Overnight
Mostly clear, with a low around 80. South southwest wind around 10 mph.
Wednesday
Sunny and hot, with a high near 103. South southwest wind around 10 mph.
Wednesday Night
Mostly clear, with a low around 80. South wind around 10 mph.
Thursday
Partly sunny, then gradually becoming sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 79. South wind around 5 mph.
Friday
Sunny and hot, with a high near 102. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 78. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 102. South wind around 5 mph.
Saturday Night
Mostly clear, with a low around 78. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 102.
Sunday Night
Mostly clear, with a low around 80.
Monday
Sunny and hot, with a high near 102.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Sunny and hot, with a high near 101.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Farmersville TX
 33.17°N 96.43°W (Elev. 489 ft)
6:12 pm CDT Aug 18, 2026
12am CDT Aug 19, 2026-6pm CDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database