Severe Weather and Heavy Rain from the Great Lakes to the Mid-Atlantic; Heat Persists in the East

Widespread strong thunderstorms with damaging winds and locally heavy rain are expected from the Upper Ohio Valley into the southern Mid-Atlantic today and portions of the central Appalachians and Carolinas on Saturday. Monsoonal moisture will bring a flash flooding threat to the Desert Southwest. Sweltering heat persists from the Plains to the southern Mid-Atlantic through tonight. Read More >

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Mostly Cloudy

99°F

37°C

Humidity 33%
Wind Speed S 9 G 14 mph
Barometer 29.88 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index102°F (39°C)
Last update 4 Sep 4:53 pm CDT
Extended Forecast for

Lewisville TX

  • Tonight

    Tonight: Mostly clear, with a low around 79. South wind 5 to 10 mph.

    Low: 79 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 100 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 80. Southeast wind 5 to 10 mph becoming light south  after midnight.

    Low: 80 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 101 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 81. East southeast wind 5 to 10 mph becoming light and variable  after midnight.

    Low: 81 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny and hot, with a high near 101. Light south wind becoming southeast 5 to 10 mph in the afternoon.

    High: 101 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 81. Southeast wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 101. South southeast wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 81. South southeast wind 5 to 10 mph.

    Low: 81 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 79. South wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 100. Heat index values as high as 104. Calm wind becoming southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 80. Southeast wind 5 to 10 mph becoming light south after midnight.
Sunday
Sunny and hot, with a high near 101. Heat index values as high as 109. Calm wind becoming east southeast around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 81. East southeast wind 5 to 10 mph becoming light and variable after midnight.
Labor Day
Sunny and hot, with a high near 101. Light south wind becoming southeast 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 81. Southeast wind 5 to 10 mph.
Tuesday
Sunny and hot, with a high near 101. South southeast wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 81. South southeast wind 5 to 10 mph.
Wednesday
Sunny and hot, with a high near 100.
Wednesday Night
Mostly clear, with a low around 80.
Thursday
Sunny and hot, with a high near 100.
Thursday Night
Mostly clear, with a low around 80.
Friday
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)
5:06 pm CDT Sep 4, 2026
5pm CDT Sep 4, 2026-6pm CDT Sep 11, 2026
 
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Additional Resources

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