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

Severe Weather and Heavy Rainfall in the Ohio Valley; Heat Continuing in the South and Southeast

Severe thunderstorms with damaging wind gusts will be possible from the mid-Mississippi Valley into parts of the Ohio Valley and central Appalachians tonight. Heavy rain associated with these storms may lead to considerable flash and urban flooding impacts across portions of the Ohio Valley. Mid-summer heat persists from the Central Plains to the Southeast. Read More >

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Fair

84°F

29°C

Humidity 66%
Wind Speed S 7 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 12 Aug 4:15 am CDT
Extended Forecast for

Lewisville TX

  • Today

    Today: Sunny and hot, with a high near 102. Heat index values as high as 105. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 102 °F

    Hot

  • Tonight

    Tonight: Clear, with a low around 80. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 80 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 30 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 80. South wind 15 to 20 mph, with gusts as high as 25 mph.

    Low: 80 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. South wind around 15 mph, with gusts as high as 25 mph.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 81 °F

    Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 102. South wind around 10 mph, with gusts as high as 20 mph.

    High: 102 °F

    Hot

  • Saturday Night

    Saturday Night: Clear, with a low around 81. South wind 5 to 10 mph.

    Low: 81 °F

    Clear

  • Sunday

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

    High: 103 °F

    Hot

Detailed Forecast

Today
Sunny and hot, with a high near 102. Heat index values as high as 105. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 80. South wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Sunny and hot, with a high near 101. South wind around 15 mph, with gusts as high as 30 mph.
Thursday Night
Clear, with a low around 80. South wind 15 to 20 mph, with gusts as high as 25 mph.
Friday
Sunny and hot, with a high near 100. South wind around 15 mph, with gusts as high as 25 mph.
Friday Night
Clear, with a low around 81. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny and hot, with a high near 102. South wind around 10 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 81. South wind 5 to 10 mph.
Sunday
Sunny and hot, with a high near 103. South southwest wind around 5 mph.
Sunday Night
Clear, with a low around 81.
Monday
Sunny and hot, with a high near 104.
Monday Night
Clear, with a low around 82.
Tuesday
Sunny and hot, with a high near 103.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
Last Update:
1:26 am CDT Aug 12, 2026
Forecast Valid:
4am CDT Aug 12, 2026-6pm CDT Aug 18, 2026
 
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