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

Severe Thunderstorm and Flash Flooding Threats in the South

Organized severe thunderstorms capable of producing mainly large hail and perhaps damaging winds are expected across portions of Louisiana this afternoon with a second round further west tonight. Heavy thunderstorms may lead to flash flooding over portions of the northern Gulf Coast today through Saturday. Several inches of excessive rainfall are possible with Flash Flood Watches in effect. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

61°F

16°C

Humidity 67%
Wind Speed N 10 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 50°F (10°C)
Visibility 7.00 mi
Last update 13 Apr 12:52 pm EDT
Extended Forecast for

Herndon VA

  • This
    Afternoon

    This Afternoon: Partly sunny, with a high near 66. North wind around 7 mph.

    Partly Sunny

    High: 66 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 50. East wind around 5 mph becoming south after midnight.

    Partly Cloudy

    Low: 50 °F

  • Wednesday

    Wednesday: A chance of showers. Cloudy, with a high near 65. South wind around 6 mph. Chance of precipitation is 50%.

    Chance
    Showers

    High: 65 °F

  • Wednesday
    Night

    Wednesday Night: A chance of showers. Cloudy, with a low around 51. Southeast wind 3 to 6 mph. Chance of precipitation is 50%.

    Chance
    Showers

    Low: 51 °F

  • Thursday

    Thursday: A chance of rain. Partly sunny, with a high near 62. Northwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.

    Chance Rain

    High: 62 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 42.

    Partly Cloudy

    Low: 42 °F

  • Friday

    Friday: Mostly sunny, with a high near 60.

    Mostly Sunny

    High: 60 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 42.

    Partly Cloudy

    Low: 42 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 63.

    Mostly Sunny

    High: 63 °F

Detailed Forecast

This Afternoon
Partly sunny, with a high near 66. North wind around 7 mph.
Tonight
Partly cloudy, with a low around 50. East wind around 5 mph becoming south after midnight.
Wednesday
A chance of showers. Cloudy, with a high near 65. South wind around 6 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Cloudy, with a low around 51. Southeast wind 3 to 6 mph. Chance of precipitation is 50%.
Thursday
A chance of rain. Partly sunny, with a high near 62. Northwest wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 42.
Saturday
Mostly sunny, with a high near 63.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
A chance of showers. Partly sunny, with a high near 64. Chance of precipitation is 30%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
10:35 am EDT Apr 13, 2021
Forecast Valid:
1pm EDT Apr 13, 2021-6pm EDT Apr 19, 2021
 
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