Heavy Rainfall for the Great Lakes and Mid-Atlantic Today; Hot Temperatures in Southern California

A slow moving cold front will gradually progress through the eastern third of the U.S. today through Thursday with possible severe weather and heavy rainfall which may bring flash flooding. Moderate Risks for excessive rainfall have been issued for the central Great Lakes into the central Appalachians, and Pennsylvania today and Thursday. A Heat Advisory is in effect for southern California. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Light Rain

76°F

24°C

Humidity 77%
Wind Speed SE 10 G 20 mph
Barometer 29.84 in (1010.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 22 Sep 4:52 pm EDT
Extended Forecast for

Reston VA

Flash Flood Watch September 23, 05:00am until September 23, 02:00pm
Click here for hazard details and duration
Flash Flood Watch
  • This
    Afternoon

    This Afternoon: Showers and possibly a thunderstorm.  High near 79. Southeast wind around 10 mph, with gusts as high as 23 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Showers

    High: 79 °F

  • Tonight

    Tonight: Showers and possibly a thunderstorm.  Patchy fog after 5am. Low around 64. Southeast wind 11 to 14 mph, with gusts as high as 29 mph.  Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Showers and
    Patchy Fog

    Low: 64 °F

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then a chance of showers. Some of the storms could produce gusty winds and heavy rain.  Patchy fog before 11am. High near 73. South wind 6 to 11 mph becoming southwest in the afternoon.  Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.

    Heavy Rain
    and Patchy
    Fog then
    Chance
    Showers

    High: 73 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 53. Light and variable wind becoming northwest around 6 mph in the evening.

    Mostly Clear

    Low: 53 °F

  • Friday

    Friday: Sunny, with a high near 72. Northwest wind around 6 mph.

    Sunny

    High: 72 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 52.

    Mostly Clear

    Low: 52 °F

  • Saturday

    Saturday: Sunny, with a high near 74.

    Sunny

    High: 74 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 56.

    Partly Cloudy

    Low: 56 °F

  • Sunday

    Sunday: Sunny, with a high near 73.

    Sunny

    High: 73 °F

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 79. Southeast wind around 10 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Patchy fog after 5am. Low around 64. Southeast wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Showers and possibly a thunderstorm before 11am, then a chance of showers. Some of the storms could produce gusty winds and heavy rain. Patchy fog before 11am. High near 73. South wind 6 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 80%. New precipitation amounts between 1 and 2 inches possible.
Thursday Night
Mostly clear, with a low around 53. Light and variable wind becoming northwest around 6 mph in the evening.
Friday
Sunny, with a high near 72. Northwest wind around 6 mph.
Friday Night
Mostly clear, with a low around 52.
Saturday
Sunny, with a high near 74.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 73.
Sunday Night
Mostly clear, with a low around 54.
Monday
Sunny, with a high near 77.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Mostly sunny, with a high near 78.
Tuesday Night
Partly cloudy, with a low around 57.
Wednesday
Sunny, with a high near 75.
Click Map For Forecast
Point Forecast:
Reston VA
 38.97°N 77.36°W (Elev. 430 ft)
4:33 pm EDT Sep 22, 2021
5pm EDT Sep 22, 2021-6pm EDT Sep 29, 2021
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database