National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Overcast

90°F

32°C

Humidity 49%
Wind Speed S 8 G 18 mph
Barometer 30.02 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 24 Jul 1:47 pm CDT
Extended Forecast for

Lewisville TX

Heat Advisory July 24, 02:32pm until July 25, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 24, 02:32pm until July 25, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • This Afternoon

    High: 98 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 82. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 82 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny and hot, with a high near 101. Heat index values as high as 109. South southwest wind around 10 mph.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 82. South wind around 10 mph.

    Low: 82 °F

    Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 83. South wind 5 to 10 mph.

    Low: 83 °F

    Mostly Clear

  • Monday

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

    High: 103 °F

    Hot

  • Monday Night

    Monday Night: Clear, with a low around 83. South wind 5 to 10 mph.

    Low: 83 °F

    Clear

Detailed Forecast

This Afternoon
Partly sunny, with a high near 98. Heat index values as high as 109. South wind around 10 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 82. South wind around 10 mph, with gusts as high as 20 mph.
Saturday
Mostly cloudy, then gradually becoming sunny and hot, with a high near 101. Heat index values as high as 109. South southwest wind around 10 mph.
Saturday Night
Clear, with a low around 82. South wind around 10 mph.
Sunday
Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 83. South wind 5 to 10 mph.
Monday
Sunny and hot, with a high near 103. South southwest wind around 10 mph.
Monday Night
Clear, with a low around 83. South wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 104. South southwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 84.
Wednesday
Sunny and hot, with a high near 105.
Wednesday Night
Mostly clear, with a low around 84.
Thursday
Sunny and hot, with a high near 105.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
Last Update:
1:26 pm CDT Jul 24, 2026
Forecast Valid:
2pm CDT Jul 24, 2026-6pm CDT Jul 30, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation