National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Hazardous Weather Conditions

Current conditions at

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

88°F

31°C

Humidity 30%
Wind Speed S 7 mph
Barometer 29.89 in (1012.4 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 14 Apr 5:55 pm EDT
Extended Forecast for

Mount Vernon VA

  • Tonight

    Tonight: Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming light after midnight.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 94. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 71. Southwest wind around 6 mph.

    Low: 71 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 93. Calm wind becoming southwest 5 to 8 mph in the afternoon.

    High: 93 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers. Mostly cloudy, with a low around 70. Southwest wind 5 to 7 mph. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    Showers

  • Friday

    Friday: A chance of showers, mainly after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers before 8pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.

    Low: 60 °F

    Mostly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 67. Southwest wind 5 to 10 mph becoming light after midnight.
Wednesday
Sunny, with a high near 94. Calm wind becoming south 5 to 8 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 71. Southwest wind around 6 mph.
Thursday
Partly sunny, with a high near 93. Calm wind becoming southwest 5 to 8 mph in the afternoon.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 70. Southwest wind 5 to 7 mph. Chance of precipitation is 20%.
Friday
A chance of showers, mainly after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Friday Night
A chance of showers before 8pm. Mostly clear, with a low around 62. Chance of precipitation is 30%.
Saturday
Sunny, with a high near 90.
Saturday Night
A chance of showers after 2am. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
Sunday
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.
Sunday Night
Showers likely. Partly cloudy, with a low around 44. Chance of precipitation is 60%.
Monday
Sunny, with a high near 61.
Monday Night
Mostly clear, with a low around 41.
Tuesday
Sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Vernon VA
 38.74°N 77.11°W (Elev. 49 ft)
Last Update:
5:36 pm EDT Apr 14, 2026
Forecast Valid:
6pm EDT Apr 14, 2026-6pm EDT Apr 21, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation