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

Heavy Rain and Mountain Snow For the West Coast; Lake Effect Snow in the Great Lakes

A series of Pacific storms will deliver multiple rounds of heavy rain and mountain snow Wednesday into the Thanksgiving holiday weekend. There is an elevated concern for flash flooding, mudslides and debris flows near wildfire burn scars in California. A weak storm system will cross the Great Lakes Wednesday with accumulating Lake Effect snow. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

33°F

1°C

Humidity 75%
Wind Speed NW 3 mph
Barometer 30.16 in (1021.3 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 21 Nov 12:52 am EST
Extended Forecast for

Potomac MD

  • Overnight

    Overnight: Mostly clear, with a low around 30. West wind around 6 mph.

    Mostly Clear

    Low: 30 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.

    Mostly Sunny

    High: 48 °F

  • Wednesday
    Night

    Wednesday Night: Partly cloudy, with a low around 24. North wind around 10 mph.

    Partly Cloudy

    Low: 24 °F

  • Thanksgiving
    Day

    Thanksgiving Day: Mostly sunny, with a high near 33. North wind 8 to 10 mph.

    Mostly Sunny

    High: 33 °F

  • Thursday
    Night

    Thursday Night: Partly cloudy, with a low around 19. Northeast wind around 6 mph becoming calm.

    Partly Cloudy

    Low: 19 °F

  • Friday

    Friday: Sunny, with a high near 37.

    Sunny

    High: 37 °F

  • Friday
    Night

    Friday Night: Mostly cloudy, with a low around 29.

    Mostly Cloudy

    Low: 29 °F

  • Saturday

    Saturday: Rain. High near 49. Chance of precipitation is 100%.

    Rain

    High: 49 °F

  • Saturday
    Night

    Saturday Night: Rain likely before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.

    Rain Likely

    Low: 42 °F

Detailed Forecast

Overnight
Mostly clear, with a low around 30. West wind around 6 mph.
Wednesday
Mostly sunny, with a high near 48. Southwest wind 6 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Partly cloudy, with a low around 24. North wind around 10 mph.
Thanksgiving Day
Mostly sunny, with a high near 33. North wind 8 to 10 mph.
Thursday Night
Partly cloudy, with a low around 19. Northeast wind around 6 mph becoming calm.
Friday
Sunny, with a high near 37.
Friday Night
Mostly cloudy, with a low around 29.
Saturday
Rain. High near 49. Chance of precipitation is 100%.
Saturday Night
Rain likely before 1am. Mostly cloudy, with a low around 42. Chance of precipitation is 60%.
Sunday
Partly sunny, with a high near 55.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 42. Chance of precipitation is 40%.
Monday
A chance of rain. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 40.
Tuesday
Mostly sunny, with a high near 50.
Click Map For Forecast
Disclaimer
Map Legend
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
Last Update:
12:31 am EST Nov 21, 2018
Forecast Valid:
1am EST Nov 21, 2018-6pm EST Nov 27, 2018
 
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