Heat Wave Persists Over the Central U.S.; Significant Flooding Expected in the Northern Mid-Atlantic Tuesday

Dangerous and extreme heat will remain across portions of the Central U.S. this week, persisting across the Mid to Lower Mississippi Valleys, Gulf Coast, Southern Plains and portions of Texas. A heat wave over the Southwest will intensify late this week. Severe thunderstorms and flash flooding will spread from the Great Lakes/Ohio Valley to the Mid-Atlantic and Northeast the next few days. Read More >

Hazardous Weather Conditions

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Clear

82°F

28°C

Humidity 70%
Wind Speed S 7 mph
Barometer 29.90 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 28 Jul 6:55 am CDT
Extended Forecast for

Lewisville TX

Heat Advisory July 28, 07:57am until July 28, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 28, 07:57am until July 28, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • Today

    High: 103 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 82. South wind 5 to 10 mph.

    Low: 82 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 103. Heat index values as high as 109. South wind 5 to 10 mph.

    High: 103 °F

    Hot

  • Wednesday Night

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

    Low: 83 °F

    Mostly Clear

  • Thursday

    Thursday: 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 84. South wind 5 to 10 mph.

    Low: 84 °F

    Mostly Clear

  • Friday

    Friday: Sunny and hot, with a high near 104. Southwest wind around 10 mph.

    High: 104 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 84. South wind around 10 mph.

    Low: 84 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 103. Heat index values as high as 109. South wind 5 to 10 mph.
Tonight
Mostly clear, with a low around 82. South wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 103. Heat index values as high as 109. South wind 5 to 10 mph.
Wednesday Night
Mostly clear, with a low around 83. South southeast wind 5 to 10 mph.
Thursday
Sunny and hot, with a high near 103. South southwest wind 5 to 10 mph.
Thursday Night
Mostly clear, with a low around 84. South wind 5 to 10 mph.
Friday
Sunny and hot, with a high near 104. Southwest wind around 10 mph.
Friday Night
Mostly clear, with a low around 84. South wind around 10 mph.
Saturday
Sunny and hot, with a high near 102. West wind 10 to 15 mph becoming north in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 78.
Sunday
Sunny, with a high near 98.
Sunday Night
Clear, with a low around 79.
Monday
Sunny and hot, with a high near 100.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
6:06 am CDT Jul 28, 2026
7am CDT Jul 28, 2026-6pm CDT Aug 3, 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