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 >

Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Thunderstorm Heavy Rain

77°F

25°C

Humidity 81%
Wind Speed NW 15 G 33 mph
Barometer 29.91 in (1013.1 mb)
Dewpoint 71°F (22°C)
Visibility 5.00 mi
Heat Index79°F (26°C)
Last update 4 Sep 4:55 pm EDT
Extended Forecast for

Mount Vernon VA

  • Tonight

    Tonight: A chance of showers and thunderstorms. Some of the storms could be severe.  Mostly cloudy, with a low around 72. Northwest wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 50%.

    Low: 72 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms after 5pm.  Partly sunny, with a high near 84. North wind 3 to 5 mph.  Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am.  Mostly cloudy, with a low around 66. Calm wind.  Chance of precipitation is 40%.

    Low: 66 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers after 2pm.  Mostly sunny, with a high near 82. Northeast wind 5 to 7 mph.  Chance of precipitation is 20%.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62. Light east wind.

    Low: 62 °F

    Partly Cloudy

  • Labor Day

    Labor Day: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Some of the storms could be severe. Mostly cloudy, with a low around 72. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 50%.
Saturday
A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 84. North wind 3 to 5 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 40%.
Sunday
A slight chance of showers after 2pm. Mostly sunny, with a high near 82. Northeast wind 5 to 7 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 62. Light east wind.
Labor Day
Sunny, with a high near 83.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 89.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Friday
Sunny, with a high near 83.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.72°N 77.11°W (Elev. 36 ft)
4:53 pm EDT Sep 4, 2026
6pm EDT Sep 4, 2026-6pm EDT Sep 11, 2026
 
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Additional Resources

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