On July 7, 2015, NWS implemented changes to the icons depicted on all of its point-forecast pages. Changes include new icon images with increased clarity, 6-hour increments for rapidly changing weather and new color blocks to highlight forecast hazards.

A page depicting all of the new icon images can be accessed here: www.weather.gov/forecast-icons

Changes to the icons were based on analysis of 6,700 public comments collected in 2014. Also, many of these changes are based on the results of a research project led by the National Center for Atmospheric Research.

Users are encouraged to continue to provide comments regarding these changes via email at icons@noaa.gov. NWS will continue to analyze incoming feedback and refine the icons as necessary. Any substantial change to the icons will be facilitated through the NWS public comment/review process.

Heavy rain possible across parts of Midwest

A storm system moving across the central U.S. will bring showers and thunderstorms to parts of the Midwest on Friday, with the possibility of heavy rain and flash flooding for some locations. Remember, it takes just 12 inches of rushing water to carry away a small car. If you see a flooded roadway, Turn Around Don't Drown.
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Current conditions at

Washington DC, Washington-Dulles International Airport (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

82°F

28°C

Humidity 40%
Wind Speed Calm
Barometer 30.14 in (1020.4 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 28 Aug 5:52 pm EDT
Extended Forecast for

Potomac MD

  • Tonight

    Tonight: Mostly clear, with a low around 63. Calm wind becoming southeast around 5 mph.

    Mostly Clear

    Low: 63 °F

  • Saturday

    Saturday: Mostly sunny, with a high near 87. South wind 3 to 7 mph.

    Mostly Sunny

    High: 87 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 66. South wind 3 to 6 mph.

    Partly Cloudy

    Low: 66 °F

  • Sunday

    Sunday: Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.

    Partly Sunny

    High: 90 °F

  • Sunday
    Night

    Sunday Night: Mostly cloudy, with a low around 68. Southwest wind around 6 mph becoming calm  after midnight.

    Mostly Cloudy

    Low: 68 °F

  • Monday

    Monday: Partly sunny, with a high near 89.

    Partly Sunny

    High: 89 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 70.

    Partly Cloudy

    Low: 70 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 90.

    Mostly Sunny

    High: 90 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 69.

    Partly Cloudy

    Low: 69 °F

Detailed Forecast

Tonight
Mostly clear, with a low around 63. Calm wind becoming southeast around 5 mph.
Saturday
Mostly sunny, with a high near 87. South wind 3 to 7 mph.
Saturday Night
Partly cloudy, with a low around 66. South wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 90. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 68. Southwest wind around 6 mph becoming calm after midnight.
Monday
Partly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 90.
Tuesday Night
Partly cloudy, with a low around 69.
Wednesday
Mostly sunny, with a high near 90.
Wednesday Night
Partly cloudy, with a low around 69.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 68.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
  Click Map For Forecast
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
5:29 pm EDT Aug 28, 2015
6pm EDT Aug 28, 2015-6pm EDT Sep 4, 2015
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database