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.

A Slight Risk of Severe Thunderstorms into Tonight

Severe thunderstorms may develop and move southeastward this evening and tonight across parts of the north-central Plains and Upper Midwest, offering damaging wind, severe hail and the risk of a few tornadoes. A few thunderstorms may drop hail and damaging gusts near severe levels in New England.
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Current conditions at

Washington DC, Washington-Dulles International Airport (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

85°F

29°C

Humidity 51%
Wind Speed NW 10 mph
Barometer 29.89 in (1011.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 1 Aug 1:52 pm EDT
Extended Forecast for

Potomac MD

  • This
    Afternoon

    This Afternoon: Mostly sunny, with a high near 87. West wind around 8 mph.

    Mostly Sunny

    High: 87 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 67. Northwest wind 5 to 7 mph.

    Partly Cloudy

    Low: 67 °F

  • Sunday

    Sunday: Sunny, with a high near 87. Light and variable wind becoming west around 5 mph in the afternoon.

    Sunny

    High: 87 °F

  • Sunday
    Night

    Sunday Night: Mostly clear, with a low around 69. South wind around 6 mph.

    Mostly Clear

    Low: 69 °F

  • Monday

    Monday: Mostly sunny, with a high near 93. Southwest wind 7 to 14 mph.

    Mostly Sunny

    High: 93 °F

  • Monday
    Night

    Monday Night: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 71. Chance of precipitation is 20%.

    Slight Chance
    T-storms

    Low: 71 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89.

    Mostly Sunny

    High: 89 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 71.

    Mostly Cloudy

    Low: 71 °F

  • Wednesday

    Wednesday: A chance of showers and thunderstorms.  Partly sunny, with a high near 87. Chance of precipitation is 30%.

    Chance
    T-storms

    High: 87 °F

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 87. West wind around 8 mph.
Tonight
Partly cloudy, with a low around 67. Northwest wind 5 to 7 mph.
Sunday
Sunny, with a high near 87. Light and variable wind becoming west around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 69. South wind around 6 mph.
Monday
Mostly sunny, with a high near 93. Southwest wind 7 to 14 mph.
Monday Night
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Mostly cloudy, with a low around 71.
Wednesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 30%.
  Click Map For Forecast
Point Forecast:
Potomac MD
 39.02°N 77.2°W (Elev. 381 ft)
1:36 pm EDT Aug 1, 2015
2pm EDT Aug 1, 2015-6pm EDT Aug 7, 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