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Hazardous Weather Conditions

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Clear

77°F

25°C

Humidity 94%
Wind Speed S 6 mph
Barometer 29.72 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 17 Jun 5:47 am CDT
Extended Forecast for

Lewisville TX

Heat Advisory June 18, 12:00pm until June 18, 09:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Partly sunny, then gradually becoming sunny, with a high near 96. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 96 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 77 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 98. Heat index values as high as 109. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 98 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 79. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: A 40 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 95. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.

    High: 95 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 77. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.

    Low: 77 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 20 mph.

    High: 94 °F

    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny and hot, with a high near 99. South wind 15 to 20 mph, with gusts as high as 30 mph.

    High: 99 °F

    Hot

Detailed Forecast

Today
Partly sunny, then gradually becoming sunny, with a high near 96. Heat index values as high as 104. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 77. South southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Mostly sunny, with a high near 98. Heat index values as high as 109. South southeast wind 10 to 15 mph, with gusts as high as 20 mph.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Partly cloudy, with a low around 79. South southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Juneteenth
A 40 percent chance of showers and thunderstorms, mainly before 1pm. Mostly cloudy, with a high near 95. Northeast wind 5 to 10 mph becoming east southeast in the afternoon.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 77. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Saturday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 94. South wind 10 to 15 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 78. South wind 10 to 15 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny and hot, with a high near 99. South wind 15 to 20 mph, with gusts as high as 30 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 80.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 98.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 78.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
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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:
4:26 am CDT Jun 17, 2026
Forecast Valid:
6am CDT Jun 17, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation