Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

A Few Clouds

86°F

30°C

Humidity 55%
Wind Speed S 13 G 20 mph
Barometer 30.05 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 30 Jun 10:47 am CDT
Extended Forecast for

Lewisville TX

  • Today

    Today: Sunny, with a high near 98. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 98 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 79. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 79 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 98. Heat index values as high as 102. South wind around 10 mph, with gusts as high as 20 mph.

    High: 98 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 80. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 80 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 81. Southeast wind around 10 mph.

    Low: 81 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and hot, with a high near 99. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 82. South southeast wind around 10 mph.

    Low: 82 °F

    Mostly Clear

  • Independence Day

    Independence Day: Sunny and hot, with a high near 101. South wind around 10 mph.

    High: 101 °F

    Hot

Detailed Forecast

Today
Sunny, with a high near 98. Heat index values as high as 102. South wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 79. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 98. Heat index values as high as 102. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 80. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 81. Southeast wind around 10 mph.
Friday
Sunny and hot, with a high near 99. South wind 5 to 10 mph.
Friday Night
Mostly clear, with a low around 82. South southeast wind around 10 mph.
Independence Day
Sunny and hot, with a high near 101. South wind around 10 mph.
Saturday Night
Partly cloudy, with a low around 82.
Sunday
A 20 percent chance of showers and thunderstorms. Mostly sunny and hot, with a high near 99.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 80.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 97.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 96.97°W (Elev. 456 ft)
6:06 am CDT Jun 30, 2026
11am CDT Jun 30, 2026-6pm CDT Jul 6, 2026
 
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Additional Resources

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