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Severe thunderstorms possible over the Mid Atlantic and Northeast U.S.

Severe thunderstorms may develop Monday afternoon and evening over portions of the Mid Atlantic and Northeast U.S. A few of the storms could contain damaging winds, large hail, and heavy rainfall. The severe weather threat will shift to the upper Midwest and Great Lakes by Tuesday and Wednesday of this week. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

73°F

23°C

Humidity 96%
Wind Speed Calm
Barometer 29.75 in (1007.0 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 24 Jul 1:52 am EDT
Extended Forecast for

Herndon VA

  • Overnight

    Overnight: Scattered showers and thunderstorms.  Patchy fog.  Otherwise, mostly cloudy, with a low around 71. Southwest wind 3 to 5 mph.  Chance of precipitation is 50%.

    Scattered
    T-storms and
    Patchy Fog

    Low: 71 °F

  • Monday

    Monday: Scattered showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 11am.  Mostly sunny, with a high near 90. West wind 6 to 9 mph.  Chance of precipitation is 30%.

    Scattered
    Showers then
    Slight Chance
    T-storms

    High: 90 °F

  • Monday
    Night

    Monday Night: Partly cloudy, with a low around 69. Northwest wind around 6 mph.

    Partly Cloudy

    Low: 69 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 85. Northwest wind 7 to 10 mph.

    Mostly Sunny

    High: 85 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around 67. North wind 3 to 7 mph.

    Partly Cloudy

    Low: 67 °F

  • Wednesday

    Wednesday: Partly sunny, with a high near 84.

    Partly Sunny

    High: 84 °F

  • Wednesday
    Night

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

    Partly Cloudy

    Low: 70 °F

  • Thursday

    Thursday: Partly sunny, with a high near 88.

    Partly Sunny

    High: 88 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 73. Chance of precipitation is 30%.

    Chance
    T-storms

    Low: 73 °F

Detailed Forecast

Overnight
Scattered showers and thunderstorms. Patchy fog. Otherwise, mostly cloudy, with a low around 71. Southwest wind 3 to 5 mph. Chance of precipitation is 50%.
Monday
Scattered showers and thunderstorms before 8am, then a slight chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 90. West wind 6 to 9 mph. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 69. Northwest wind around 6 mph.
Tuesday
Mostly sunny, with a high near 85. Northwest wind 7 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 67. North wind 3 to 7 mph.
Wednesday
Partly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
Partly sunny, with a high near 88.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 88. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 85.
Click Map For Forecast
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
2:09 am EDT Jul 24, 2017
2am EDT Jul 24, 2017-6pm EDT Jul 30, 2017
 
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