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

Heavy Snow for the North-Central U.S.; Bitter Cold and a Second Storm to Follow

Heavy snow will develop overnight in the Dakotas and move into northern Minnesota on Thursday. Light sleet and freezing rain accumulations will be possible south of the area of heavy snow from South Dakota into central Minnesota. Bitter cold temperatures will follow this weekend along with another storm impacting the Pacific Northwest starting Friday then moving down the Rockies through Monday. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fog

60°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 30.20 in (1022.6 mb)
Dewpoint 60°F (16°C)
Visibility 0.25 mi
Last update 22 Oct 4:52 am EDT
Extended Forecast for

3 Miles NNW Mc Lean VA

Dense Fog Advisory until October 22, 10:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until October 22, 10:00am

    NOW until
    10:00am Thu

    Dense Fog Advisory

  • Overnight

    Overnight: Areas of fog. Otherwise, partly cloudy, with a low around 64. Calm wind.

    Areas Fog

    Low: 64 °F

  • Thursday

    Thursday: Areas of dense fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming south around 6 mph in the afternoon.

    Areas Dense
    Fog then
    Sunny

    High: 78 °F

  • Thursday
    Night

    Thursday Night: Areas of fog after 2am. Otherwise, partly cloudy, with a low around 60. Southeast wind 3 to 5 mph.

    Partly Cloudy
    then Areas
    Fog

    Low: 60 °F

  • Friday

    Friday: Areas of fog before 11am. Otherwise, partly sunny, with a high near 74. Southeast wind 3 to 7 mph.

    Areas Fog
    then Partly
    Sunny

    High: 74 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 58. South wind around 7 mph.

    Partly Cloudy

    Low: 58 °F

  • Saturday

    Saturday: A slight chance of showers after 2pm. Mostly sunny, with a high near 75. Chance of precipitation is 20%.

    Mostly Sunny
    then Slight
    Chance
    Showers

    High: 75 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 48.

    Mostly Cloudy

    Low: 48 °F

  • Sunday

    Sunday: Mostly cloudy, with a high near 56.

    Mostly Cloudy

    High: 56 °F

Detailed Forecast

Overnight
Areas of fog. Otherwise, partly cloudy, with a low around 64. Calm wind.
Thursday
Areas of dense fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 78. Calm wind becoming south around 6 mph in the afternoon.
Thursday Night
Areas of fog after 2am. Otherwise, partly cloudy, with a low around 60. Southeast wind 3 to 5 mph.
Friday
Areas of fog before 11am. Otherwise, partly sunny, with a high near 74. Southeast wind 3 to 7 mph.
Friday Night
Partly cloudy, with a low around 58. South wind around 7 mph.
Saturday
A slight chance of showers after 2pm. Mostly sunny, with a high near 75. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 48.
Sunday
Mostly cloudy, with a high near 56.
Sunday Night
Mostly cloudy, with a low around 51.
Monday
Partly sunny, with a high near 71.
Monday Night
Mostly cloudy, with a low around 57.
Tuesday
A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 62. Chance of precipitation is 30%.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
3 Miles NNW Mc Lean VA
 38.98°N 77.24°W (Elev. 98 ft)
Last Update:
4:32 am EDT Oct 22, 2020
Forecast Valid:
5am EDT Oct 22, 2020-6pm EDT Oct 28, 2020
 
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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