Dangerous Heat in the West; Flash Flooding Possible Across the Southern US

Dangerous heat is expected across areas in Texas and from Washington through California. Several daily high temperature records are expected to be either tied or broken in the West. Monsoonal showers and thunderstorms may result in flash flooding and debris flows over the Southwestern U.S. through Friday. Locally heavy rain is expected from thunderstorms in the Southeast. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

61°F

16°C

Humidity 87%
Wind Speed Calm
Barometer 30.01 in (1015.9 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 17 Aug 3:52 am EDT
Extended Forecast for

Herndon VA

  • Today

    Today: Scattered showers and thunderstorms after 2pm.  Mostly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon.  Chance of precipitation is 30%.

    Mostly Sunny
    then
    Scattered
    T-storms

    High: 82 °F

  • Tonight

    Tonight: Scattered showers and thunderstorms before 8pm, then isolated showers between 8pm and 11pm.  Partly cloudy, with a low around 60. Light north wind.  Chance of precipitation is 30%.

    Scattered
    T-storms then
    Partly Cloudy

    Low: 60 °F

  • Thursday

    Thursday: A slight chance of showers and thunderstorms after 2pm.  Sunny, with a high near 84. Light and variable wind.  Chance of precipitation is 20%.

    Sunny then
    Slight Chance
    T-storms

    High: 84 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 64. Calm wind.

    Mostly Clear

    Low: 64 °F

  • Friday

    Friday: Mostly sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the afternoon.

    Mostly Sunny

    High: 87 °F

  • Friday
    Night

    Friday Night: A slight chance of showers after 2am.  Mostly cloudy, with a low around 67. Chance of precipitation is 20%.

    Mostly Cloudy
    then Slight
    Chance
    Showers

    Low: 67 °F

  • Saturday

    Saturday: A chance of showers after 2pm.  Partly sunny, with a high near 83. Chance of precipitation is 30%.

    Partly Sunny
    then Chance
    Showers

    High: 83 °F

  • Saturday
    Night

    Saturday Night: A chance of showers before 8pm.  Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

    Chance
    Showers then
    Mostly Cloudy

    Low: 66 °F

  • Sunday

    Sunday: A chance of showers after 2pm.  Partly sunny, with a high near 84. Chance of precipitation is 40%.

    Mostly Cloudy
    then Chance
    Showers

    High: 84 °F

Detailed Forecast

Today
Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 82. Calm wind becoming north around 6 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms before 8pm, then isolated showers between 8pm and 11pm. Partly cloudy, with a low around 60. Light north wind. Chance of precipitation is 30%.
Thursday
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 84. Light and variable wind. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 64. Calm wind.
Friday
Mostly sunny, with a high near 87. Calm wind becoming south 5 to 7 mph in the afternoon.
Friday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 20%.
Saturday
A chance of showers after 2pm. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunday
A chance of showers after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 83. Chance of precipitation is 50%.
Click Map For Forecast
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
1:29 am EDT Aug 17, 2022
4am EDT Aug 17, 2022-6pm EDT Aug 23, 2022
 
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