Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Clear

100°F

38°C

Humidity 31%
Wind Speed W 2 mph
Barometer 29.89 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 26 Aug 6:47 pm CDT
Extended Forecast for

Lewisville TX

Heat Advisory August 26, 07:41pm until August 27, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 26, 07:41pm until August 27, 08:00pm

    NOW until 8:00pm Thu

    Heat Advisory

  • Tonight

    Low: 80 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny and hot, with a high near 101. Heat index values as high as 109. North northeast wind 5 to 10 mph.

    High: 101 °F

    Hot

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 79. Northeast wind 5 to 10 mph becoming east southeast after midnight.

    Low: 79 °F

    Partly Cloudy

  • Friday

    Friday: Sunny and hot, with a high near 99. Heat index values as high as 107. East wind around 5 mph.

    High: 99 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 80. South wind 5 to 10 mph.

    Low: 80 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 101. South wind around 5 mph.

    High: 101 °F

    Hot

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 80. South southeast wind around 10 mph.

    Low: 80 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 101. South wind around 10 mph, with gusts as high as 20 mph.

    High: 101 °F

    Hot

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 4am. Partly cloudy, with a low around 80. North wind around 5 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny and hot, with a high near 101. Heat index values as high as 109. North northeast wind 5 to 10 mph.
Thursday Night
Partly cloudy, with a low around 79. Northeast wind 5 to 10 mph becoming east southeast after midnight.
Friday
Sunny and hot, with a high near 99. Heat index values as high as 107. East wind around 5 mph.
Friday Night
Mostly clear, with a low around 80. South wind 5 to 10 mph.
Saturday
Sunny and hot, with a high near 101. South wind around 5 mph.
Saturday Night
Mostly clear, with a low around 80. South southeast wind around 10 mph.
Sunday
Sunny and hot, with a high near 101. South wind around 10 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 80. South wind around 10 mph, with gusts as high as 20 mph.
Monday
Sunny and hot, with a high near 100.
Monday Night
Mostly clear, with a low around 80.
Tuesday
Sunny and hot, with a high near 100.
Tuesday Night
Mostly clear, with a low around 81.
Wednesday
Sunny and hot, with a high near 102.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
6:06 pm CDT Aug 26, 2026
7pm CDT Aug 26, 2026-6pm CDT Sep 2, 2026
 
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Additional Resources

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