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

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

9°F

-13°C

Humidity 77%
Wind Speed SE 3 mph
Barometer 30.51 in (1033.6 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 21 Jan 4:52 am EST
Extended Forecast for

Catharpin VA

  • Today

    Today: Increasing clouds, with a high near 40. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 26 mph.

    High: 40 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 31. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 31 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 51. Southwest wind 7 to 11 mph becoming west in the afternoon. Winds could gust as high as 21 mph.

    High: 51 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25. Northwest wind around 5 mph becoming calm in the evening.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 40. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

    High: 40 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of snow after 1pm. Cloudy, with a high near 19. Chance of precipitation is 40%.

    High: 19 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Snow. Low around 13. Chance of precipitation is 80%.

    Low: 13 °F

    Snow

  • Sunday

    Sunday: Snow. High near 19. Chance of precipitation is 90%.

    High: 19 °F

    Snow

Detailed Forecast

Today
Increasing clouds, with a high near 40. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 26 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 31. South wind 8 to 10 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 51. Southwest wind 7 to 11 mph becoming west in the afternoon. Winds could gust as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 25. Northwest wind around 5 mph becoming calm in the evening.
Friday
Mostly cloudy, with a high near 40. Light northwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 10.
Saturday
A chance of snow after 1pm. Cloudy, with a high near 19. Chance of precipitation is 40%.
Saturday Night
Snow. Low around 13. Chance of precipitation is 80%.
Sunday
Snow. High near 19. Chance of precipitation is 90%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 11. Chance of precipitation is 50%.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 4.
Tuesday
Mostly sunny, with a high near 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Catharpin VA
 38.86°N 77.58°W (Elev. 295 ft)
Last Update:
5:29 am EST Jan 21, 2026
Forecast Valid:
5am EST Jan 21, 2026-6pm EST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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