Heavy Rain and Strong-to-Severe Thunderstorms from the Central Miss. Valley to the Mid-Atlantic

A slow-moving weather system in the eastern U.S. will focus showers and thunderstorms from the mid-Mississippi River Valley to the Mid-Atlantic on Thursday. Abundant moisture will allow occasionally heavy rainfall. Flash Flood Watches are in effect in these areas. Severe thunderstorms with damaging wind gusts and large hail will also be possible in this same area. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

75°F

24°C

Humidity 83%
Wind Speed Calm
Barometer 29.97 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 28 Jul 12:55 am EDT
Extended Forecast for

Rockville MD

  • Overnight

    Overnight: Mostly cloudy, with a low around 74. Calm wind.

    Mostly Cloudy

    Low: 74 °F

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 2pm.  Mostly cloudy, with a high near 91. Light southwest wind.  Chance of precipitation is 40%.

    Chance
    T-storms

    High: 91 °F

  • Thursday
    Night

    Thursday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm.  Low around 72. South wind around 6 mph becoming light and variable  in the evening.  Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Showers

    Low: 72 °F

  • Friday

    Friday: Showers and possibly a thunderstorm.  High near 83. Northwest wind 5 to 7 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Showers

    High: 83 °F

  • Friday
    Night

    Friday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm.  Mostly cloudy, with a low around 70. North wind around 5 mph becoming calm  after midnight.  Chance of precipitation is 60%.

    Showers
    Likely

    Low: 70 °F

  • Saturday

    Saturday: A chance of showers and thunderstorms.  Partly sunny, with a high near 88. Chance of precipitation is 40%.

    Chance
    T-storms

    High: 88 °F

  • Saturday
    Night

    Saturday Night: Showers and thunderstorms likely.  Mostly cloudy, with a low around 72. Chance of precipitation is 60%.

    T-storms
    Likely

    Low: 72 °F

  • Sunday

    Sunday: Showers and thunderstorms likely.  Mostly cloudy, with a high near 86. Chance of precipitation is 60%.

    T-storms
    Likely

    High: 86 °F

  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 71. Chance of precipitation is 50%.

    Chance
    T-storms

    Low: 71 °F

Detailed Forecast

Overnight
Mostly cloudy, with a low around 74. Calm wind.
Thursday
A chance of showers and thunderstorms, mainly after 2pm. Mostly cloudy, with a high near 91. Light southwest wind. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8pm. Low around 72. South wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Friday
Showers and possibly a thunderstorm. High near 83. Northwest wind 5 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 70. North wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Sunday
Showers and thunderstorms likely. Mostly cloudy, with a high near 86. Chance of precipitation is 60%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 50%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
Monday Night
Mostly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 70.
Wednesday
Mostly sunny, with a high near 88.
Click Map For Forecast
Point Forecast:
Rockville MD
 39.08°N 77.16°W (Elev. 430 ft)
10:27 pm EDT Jul 27, 2016
1am EDT Jul 28, 2016-6pm EDT Aug 3, 2016
 
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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