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

100°F

38°C

Humidity 33%
Wind Speed SW 12 G 18 mph
Barometer 29.96 in (1013.4 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 19 Aug 12:53 pm CDT
Extended Forecast for

Lucas TX

Extreme Heat Warning August 19, 01:12pm until August 20, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 19, 01:12pm until August 20, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • This Afternoon

    High: 103 °F

    Hot

  • Tonight

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

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 104. Heat index values as high as 107. South southwest wind around 10 mph.

    High: 104 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 80. South wind around 5 mph.

    Low: 80 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 104. West southwest wind around 5 mph.

    High: 104 °F

    Hot

  • Friday Night

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

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 104. Southwest wind 5 to 10 mph.

    High: 104 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 80. South wind around 5 mph.

    Low: 80 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 103. Heat index values as high as 107. South wind around 10 mph.
Tonight
Mostly clear, with a low around 80. South wind around 10 mph.
Thursday
Sunny and hot, with a high near 104. Heat index values as high as 107. South southwest wind around 10 mph.
Thursday Night
Mostly clear, with a low around 80. South wind around 5 mph.
Friday
Sunny and hot, with a high near 104. West southwest wind around 5 mph.
Friday Night
Mostly clear, with a low around 79. South southeast wind around 5 mph.
Saturday
Sunny and hot, with a high near 104. Southwest wind 5 to 10 mph.
Saturday Night
Mostly clear, with a low around 80. South wind around 5 mph.
Sunday
Sunny and hot, with a high near 105. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 81.
Monday
Sunny and hot, with a high near 104.
Monday Night
Mostly clear, with a low around 81.
Tuesday
Sunny and hot, with a high near 103.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Lucas TX
 33.1°N 96.59°W (Elev. 597 ft)
11:31 am CDT Aug 19, 2026
1pm 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