Flooding Threat Along the Gulf Coast, Southern Rockies and High Plains; Cooler Weather in the Central and Eastern U.S.

Strong thunderstorms may bring excessive rainfall and flooding over parts of the northern Gulf Coast today and over parts of the southern Rockies into the High Plains today through the weekend. A refreshingly cool and dry air mass will continue to produce below average temperatures across the central and eastern U.S. through the weekend. Read More >

Current conditions at

Dallas / Addison Airport (KADS)

Lat: 32.97°NLon: 96.83°WElev: 643ft.

Mostly Cloudy

79°F

26°C

Humidity 74%
Wind Speed NE 7 mph
Barometer 29.99 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 29 Aug 4:47 pm CDT
Extended Forecast for

Lewisville TX

  • Tonight

    Tonight: A 20 percent chance of showers after 4am.  Mostly cloudy, with a low around 73. East northeast wind 5 to 10 mph.

    Low: 73 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 10am.  Mostly cloudy, with a high near 85. East wind around 5 mph.  Chance of precipitation is 40%.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am.  Increasing clouds, with a low around 73. East wind around 5 mph.  Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 73 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Sunday

    Sunday: Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm.  Cloudy, with a high near 84. East southeast wind around 5 mph.  Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 84 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 72. Southeast wind around 5 mph becoming north northeast after midnight.  Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms

  • Labor Day

    Labor Day: A 20 percent chance of showers before 1pm.  Mostly sunny, with a high near 86. North wind around 5 mph.

    High: 86 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. North northeast wind around 5 mph becoming calm  in the evening.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. North northwest wind 5 to 10 mph.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. North wind 5 to 10 mph.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of showers after 4am. Mostly cloudy, with a low around 73. East northeast wind 5 to 10 mph.
Saturday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 85. East wind around 5 mph. Chance of precipitation is 40%.
Saturday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 73. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers likely before 10am, then showers likely and possibly a thunderstorm between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Cloudy, with a high near 84. East southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Southeast wind around 5 mph becoming north northeast after midnight. Chance of precipitation is 40%.
Labor Day
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 86. North wind around 5 mph.
Monday Night
Mostly clear, with a low around 70. North northeast wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 89. North northwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 67. North wind 5 to 10 mph.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Mostly sunny, with a high near 85.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 64.
Friday
Mostly sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
Lewisville TX
 33.05°N 97°W (Elev. 531 ft)
12:32 pm CDT Aug 29, 2025
4pm CDT Aug 29, 2025-6pm CDT Sep 5, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database