Heavy Rain and Flash Flooding Possible Over Parts of the Eastern United States

Heavy rainfall is expected over portions of the eastern United States through Thursday. Flooding and flash flooding will be possible in some areas. Click the "Read More" link for excessive rainfall forecasts from the Weather Prediction Center. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

64°F

18°C

Humidity 88%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 61°F (16°C)
Visibility 6.00 mi
Last update 28 Sep 12:55 pm EDT
Extended Forecast for

Rockville MD

Flash Flood Watch September 28, 06:00pm until September 30, 08:00am
Click here for hazard details and duration
Flash Flood Watch
  • This
    Afternoon

    This Afternoon: A slight chance of showers, then showers likely and possibly a thunderstorm after 3pm.  Cloudy, with a high near 73. East wind around 9 mph.  Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Showers
    Likely

    High: 73 °F

  • Tonight

    Tonight: Showers and possibly a thunderstorm.  Patchy fog before 9pm, then patchy fog after 3am. Low around 65. East wind around 9 mph.  Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

    Showers and
    Patchy Fog

    Low: 65 °F

  • Thursday

    Thursday: Showers, with thunderstorms also possible after 9am.  Patchy fog before 9am. High near 71. East wind 10 to 13 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.

    Showers and
    Patchy Fog

    High: 71 °F

  • Thursday
    Night

    Thursday Night: Showers and possibly a thunderstorm before 3am, then showers likely.  Low around 62. East wind 13 to 15 mph, with gusts as high as 22 mph.  Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    Showers

    Low: 62 °F

  • Friday

    Friday: Showers likely.  Mostly cloudy, with a high near 70. East wind around 11 mph.  Chance of precipitation is 60%.

    Showers
    Likely

    High: 70 °F

  • Friday
    Night

    Friday Night: Showers likely, mainly before 9pm.  Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Showers
    Likely

    Low: 63 °F

  • Saturday

    Saturday: A chance of showers.  Partly sunny, with a high near 76. Chance of precipitation is 50%.

    Chance
    Showers

    High: 76 °F

  • Saturday
    Night

    Saturday Night: A chance of showers.  Mostly cloudy, with a low around 61. Chance of precipitation is 40%.

    Chance
    Showers

    Low: 61 °F

  • Sunday

    Sunday: A chance of showers before 9am.  Mostly sunny, with a high near 75. Chance of precipitation is 30%.

    Chance
    Showers then
    Mostly Sunny

    High: 75 °F

Detailed Forecast

This Afternoon
A slight chance of showers, then showers likely and possibly a thunderstorm after 3pm. Cloudy, with a high near 73. East wind around 9 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and possibly a thunderstorm. Patchy fog before 9pm, then patchy fog after 3am. Low around 65. East wind around 9 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
Thursday
Showers, with thunderstorms also possible after 9am. Patchy fog before 9am. High near 71. East wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
Thursday Night
Showers and possibly a thunderstorm before 3am, then showers likely. Low around 62. East wind 13 to 15 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Friday
Showers likely. Mostly cloudy, with a high near 70. East wind around 11 mph. Chance of precipitation is 60%.
Friday Night
Showers likely, mainly before 9pm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Sunday
A chance of showers before 9am. Mostly sunny, with a high near 75. Chance of precipitation is 30%.
Sunday Night
A chance of showers after 9pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.
Monday
A chance of showers. Mostly sunny, with a high near 75. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 72.
Click Map For Forecast
Point Forecast:
Rockville MD
 39.08°N 77.16°W (Elev. 430 ft)
10:27 am EDT Sep 28, 2016
1pm EDT Sep 28, 2016-6pm EDT Oct 4, 2016
 
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