Heat Building and Strong to Severe Storms

A building ridge of high pressure will produce possible record heat and extremely humid conditions over the next several days. The summer heat wave is already present in the south Plains, will expand across the Mid-Atlantic/Northeast and then shift into the Desert Southwest. Meanwhile, a cold front may trigger strong to severe storms w/ heavy rain from the Great Lakes to the south-central Plains Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

23°C

74°F

Humidity 88%
Wind Speed S 6 km/h
Barometer 1014.8 mb (29.98 in)
Dewpoint 21°C (70°F)
Visibility 16 km
Last update 18 Aug 2:52 am EDT
Extended Forecast for

3 Miles ESE Chantilly VA

  • Overnight

    Overnight: Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 21. Calm wind.

    Patchy Fog

    Low: 21 °C

  • Sunday

    Sunday: Isolated showers and thunderstorms after 2pm.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 35. Heat index values as high as 39. South wind 5 to 10 km/h.  Chance of precipitation is 20%.

    Patchy Fog
    then Isolated
    T-storms

    High: 35 °C

  • Sunday
    Night

    Sunday Night: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 22. South wind 8 to 11 km/h.

    Partly Cloudy
    then Patchy
    Fog

    Low: 22 °C

  • Monday

    Monday: Patchy fog before 8am.  Otherwise, mostly sunny and hot, with a high near 36. Heat index values as high as 39. Southwest wind 5 to 8 km/h.

    Patchy Fog
    then Mostly
    Sunny

    High: 36 °C

  • Monday
    Night

    Monday Night: Patchy fog after 5am.  Otherwise, mostly cloudy, with a low around 23. South wind 5 to 10 km/h becoming west after midnight.

    Mostly Cloudy
    then Patchy
    Fog

    Low: 23 °C

  • Tuesday

    Tuesday: Scattered showers and thunderstorms after 2pm.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 35. Chance of precipitation is 40%.

    Patchy Fog
    then
    Scattered
    T-storms

    High: 35 °C

  • Tuesday
    Night

    Tuesday Night: Scattered showers and thunderstorms before 11pm, then scattered showers between 11pm and 2am.  Mostly cloudy, with a low around 22. Chance of precipitation is 40%.

    Scattered
    T-storms then
    Scattered
    Showers

    Low: 22 °C

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 33. Chance of precipitation is 40%.

    Chance
    T-storms

    High: 33 °C

  • Wednesday
    Night

    Wednesday Night: A chance of showers.  Mostly cloudy, with a low around 23. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 23 °C

Detailed Forecast

Overnight
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 21. Calm wind.
Sunday
Isolated showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 35. Heat index values as high as 39. South wind 5 to 10 km/h. Chance of precipitation is 20%.
Sunday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 22. South wind 8 to 11 km/h.
Monday
Patchy fog before 8am. Otherwise, mostly sunny and hot, with a high near 36. Heat index values as high as 39. Southwest wind 5 to 8 km/h.
Monday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 23. South wind 5 to 10 km/h becoming west after midnight.
Tuesday
Scattered showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 35. Chance of precipitation is 40%.
Tuesday Night
Scattered showers and thunderstorms before 11pm, then scattered showers between 11pm and 2am. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 33. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 32. Chance of precipitation is 60%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 19. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 29.
Friday Night
Mostly clear, with a low around 18.
Saturday
Mostly sunny, with a high near 30.
Click Map For Forecast
Point Forecast:
3 Miles ESE Chantilly VA
 38.85°N 77.35°W (Elev. 122 m)
3:15 am EDT Aug 18, 2019
3am EDT Aug 18, 2019-6pm EDT Aug 24, 2019
 
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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