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.

Isolated Severe Thunderstorms Will Continue

Isolated severe thunderstorms will continue from Minnesota to southwestern Kansas and vicinity. Within that swath, the most probable area for greater concentrations of severe weather is from eastern Nebraska across parts of Iowa. A marginal risk for severe thunderstorms also exists over eastern New England.
Read More...

Hazardous Weather Conditions

Current conditions at

Washington DC, Reagan National Airport (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Partly Cloudy

78°F

26°C

Humidity 87%
Wind Speed S 5 mph
Barometer 29.98 in (1015.2 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 29 Jul 4:52 am EDT
Extended Forecast for

Mc Lean VA

  • Today

    Today: Isolated showers and thunderstorms after 2pm.  Patchy fog before 9am.  Otherwise, partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon.  Chance of precipitation is 20%.

    Patchy Fog
    then Isolated
    T-storms

    High: 90 °F

  • Tonight

    Tonight: Partly cloudy, with a low around 75. South wind around 6 mph.

    Partly Cloudy

    Low: 75 °F

  • Thursday

    Thursday: Showers and thunderstorms likely after noon.  Partly sunny, with a high near 92. West wind 5 to 9 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Mostly Sunny
    then T-storms
    Likely

    High: 92 °F

  • Thursday
    Night

    Thursday Night: Isolated showers and thunderstorms before 10pm.  Partly cloudy, with a low around 70. West wind 3 to 5 mph.  Chance of precipitation is 20%.

    Isolated
    T-storms then
    Partly Cloudy

    Low: 70 °F

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming northwest 5 to 7 mph in the morning.

    Sunny

    High: 89 °F

  • Friday
    Night

    Friday Night: Mostly clear, with a low around 72.

    Mostly Clear

    Low: 72 °F

  • Saturday

    Saturday: Sunny, with a high near 89.

    Sunny

    High: 89 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 71.

    Partly Cloudy

    Low: 71 °F

  • Sunday

    Sunday: Mostly sunny, with a high near 90.

    Mostly Sunny

    High: 90 °F

Detailed Forecast

Today
Isolated showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 90. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 20%.
Tonight
Partly cloudy, with a low around 75. South wind around 6 mph.
Thursday
Showers and thunderstorms likely after noon. Partly sunny, with a high near 92. West wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Isolated showers and thunderstorms before 10pm. Partly cloudy, with a low around 70. West wind 3 to 5 mph. Chance of precipitation is 20%.
Friday
Sunny, with a high near 89. Calm wind becoming northwest 5 to 7 mph in the morning.
Friday Night
Mostly clear, with a low around 72.
Saturday
Sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 71.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Partly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 92.
  Click Map For Forecast
Point Forecast:
Mc Lean VA
 38.95°N 77.19°W (Elev. 253 ft)
4:37 am EDT Jul 29, 2015
5am EDT Jul 29, 2015-6pm EDT Aug 4, 2015
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Graph

National Digital Forecast Database