Dangerous heat and humidity from the central U.S. to East Coast this weekend

Hot and very humid conditions will push the heat index to well over 100 degrees across a large portion of the central and eastern U.S. Excessive Heat Warnings and Heat Advisories are in effect for much of the Plains, Miss. Valley, Midwest, Ohio Valley, Mid-Atlantic and southern states. Be very cautious if you must do outdoor activities in these areas during the afternoon and evening this weekend. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

73°F

23°C

Humidity 83%
Wind Speed Calm
Barometer 29.99 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 23 Jul 4:55 am EDT
Extended Forecast for

5 Miles NNE Sugarland Run VA

Heat Advisory July 23, 12:00pm until July 23, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Today

    Today: A slight chance of showers and thunderstorms after 1pm.  Mostly sunny and hot, with a high near 98. Heat index values as high as 104. West wind 3 to 8 mph.  Chance of precipitation is 20%.

    Sunny then
    Slight Chance
    T-storms

    High: 98 °F

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 11pm.  Partly cloudy, with a low around 71. Northwest wind 3 to 6 mph.  Chance of precipitation is 20%.

    Slight Chance
    T-storms then
    Partly Cloudy

    Low: 71 °F

  • Sunday

    Sunday: Sunny, with a high near 95. North wind around 5 mph becoming light and variable.

    Sunny

    High: 95 °F

  • Sunday
    Night

    Sunday Night: Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm  in the evening.

    Partly Cloudy

    Low: 75 °F

  • Monday

    Monday: A chance of showers and thunderstorms, mainly after 2pm.  Partly sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 8 mph in the morning.  Chance of precipitation is 30%.

    Chance
    T-storms

    High: 97 °F

  • Monday
    Night

    Monday Night: A chance of showers and thunderstorms, mainly before 2am.  Mostly cloudy, with a low around 76. Chance of precipitation is 30%.

    Chance
    T-storms

    Low: 76 °F

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 8am.  Partly sunny, with a high near 94. Chance of precipitation is 30%.

    Chance
    T-storms

    High: 94 °F

  • Tuesday
    Night

    Tuesday Night: Mostly cloudy, with a low around 74.

    Mostly Cloudy

    Low: 74 °F

  • Wednesday

    Wednesday: Mostly sunny, with a high near 94.

    Mostly Sunny

    High: 94 °F

Detailed Forecast

Today
A slight chance of showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 104. West wind 3 to 8 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers and thunderstorms before 11pm. Partly cloudy, with a low around 71. Northwest wind 3 to 6 mph. Chance of precipitation is 20%.
Sunday
Sunny, with a high near 95. North wind around 5 mph becoming light and variable.
Sunday Night
Partly cloudy, with a low around 75. Southeast wind around 5 mph becoming calm in the evening.
Monday
A chance of showers and thunderstorms, mainly after 2pm. Partly sunny and hot, with a high near 97. Calm wind becoming southwest 5 to 8 mph in the morning. Chance of precipitation is 30%.
Monday Night
A chance of showers and thunderstorms, mainly before 2am. Mostly cloudy, with a low around 76. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms after 8am. Partly sunny, with a high near 94. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 74.
Wednesday
Mostly sunny, with a high near 94.
Wednesday Night
Partly cloudy, with a low around 73.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 94. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Click Map For Forecast
Point Forecast:
5 Miles NNE Sugarland Run VA
 39.1°N 77.33°W (Elev. 243 ft)
4:27 am EDT Jul 23, 2016
5am EDT Jul 23, 2016-6pm EDT Jul 29, 2016
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database