Cold Front to Bring Cooling and Heavy Rain in the East; Building Heat and Monsoon in the West

A slow moving cold front will bring temperatures back to near normal early this week in the East. Strong to severe storms ahead of the front may produce damaging winds and heavy rain that could cause flash flooding. Strengthening high pressure in the West will produce surging monsoon moisture with potential for flash flooding. Heat may become excessive in the Desert Southwest this week. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

93°F

34°C

Humidity 44%
Wind Speed SW 9 mph
Barometer 29.79 in (1008.4 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 22 Jul 1:52 pm EDT
Extended Forecast for

Reston VA

Flash Flood Watch July 22, 03:00pm until July 23, 06:00am
Severe T-storm Watch until July 22, 10:00pm
Severe T-storm Warning until July 22, 03:30pm
Click here for hazard details and duration
Flash Flood Watch
Severe T-storm Watch
Severe T-storm Warning
  •  
    Severe T-storm Watch until July 22, 10:00pm
    Severe T-storm Warning until July 22, 03:30pm

    NOW: Multiple
    hazards in effect

    Click HERE for Details

  • This
    Afternoon

    This Afternoon: Showers and thunderstorms, mainly after 3pm. Some of the storms could produce gusty winds, heavy rain, and frequent lightning.  High near 94. Heat index values as high as 100. Southwest wind 8 to 10 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Heavy Rain

    High: 94 °F

  • Tonight

    Tonight: Showers and thunderstorms, mainly before midnight, then periods of showers and possibly a thunderstorm after midnight. Some of the storms could produce gusty winds, heavy rain, and frequent lightning.  Low around 69. West wind 6 to 8 mph.  Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Heavy Rain

    Low: 69 °F

  • Tuesday

    Tuesday: Showers and possibly a thunderstorm, mainly before noon.  High near 78. Northwest wind around 7 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Showers then
    Mostly Cloudy

    High: 78 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 64. Northwest wind around 5 mph.

    Mostly Cloudy

    Low: 64 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82. North wind 5 to 8 mph.

    Mostly Sunny

    High: 82 °F

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 63.

    Mostly Clear

    Low: 63 °F

  • Thursday

    Thursday: Sunny, with a high near 84.

    Sunny

    High: 84 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 65.

    Mostly Clear

    Low: 65 °F

Detailed Forecast

This Afternoon
Showers and thunderstorms, mainly after 3pm. Some of the storms could produce gusty winds, heavy rain, and frequent lightning. High near 94. Heat index values as high as 100. Southwest wind 8 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms, mainly before midnight, then periods of showers and possibly a thunderstorm after midnight. Some of the storms could produce gusty winds, heavy rain, and frequent lightning. Low around 69. West wind 6 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Tuesday
Showers and possibly a thunderstorm, mainly before noon. High near 78. Northwest wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Mostly cloudy, with a low around 64. Northwest wind around 5 mph.
Wednesday
Mostly sunny, with a high near 82. North wind 5 to 8 mph.
Wednesday Night
Mostly clear, with a low around 63.
Thursday
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 66.
Saturday
Sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 68.
Sunday
Mostly sunny, with a high near 89.
Click Map For Forecast
Point Forecast:
Reston VA
 38.95°N 77.36°W (Elev. 446 ft)
1:32 pm EDT Jul 22, 2019
2pm EDT Jul 22, 2019-6pm EDT Jul 28, 2019
 
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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