Heavy Rainfall in the Southwest and Southeast This Weekend; Monitoring Tropical Cyclone Formation Which Could Impact the Southeast U.S.

Heavy rainfall from monsoon thunderstorms may bring isolated flash and urban flooding to the Desert Southwest. A near-stationary front will bring numerous showers and thunderstorms to much of the Mid-Atlantic and Southeast. Tropical wave (AL94) is likely to become a depression. Significant uncertainty remains in the track and intensity, but chances for impacts to the Southeast are increasing. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

80°F

27°C

Humidity	58%
Wind Speed	Vrbl 3 mph
Barometer	29.90 in (1013.3 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	82°F (28°C)
Last update	26 Sep 1:56 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Derwood MD

This Afternoon
High: 80 °F
Mostly Sunny
Tonight
Low: 64 °F
Mostly Cloudy
Saturday
High: 75 °F
Showers
Likely
Saturday Night
Low: 63 °F
Showers
Likely and
Patchy Fog
Sunday
High: 78 °F
Slight Chance
Showers and
Patchy Fog
Sunday Night
Low: 62 °F
Mostly Cloudy
then Slight
Chance
Showers
Monday
High: 76 °F
Mostly Cloudy
then Chance
Showers
Monday Night
Low: 64 °F
Chance
Showers
Tuesday
High: 73 °F
Chance
Showers

Detailed Forecast

This Afternoon

Mostly sunny, with a high near 80. Northwest wind 3 to 5 mph.

Tonight

Mostly cloudy, with a low around 64. Calm wind.

Saturday

A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 75. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers. Patchy fog. Otherwise, cloudy, with a low around 63. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Sunday

A slight chance of showers. Patchy fog between 11am and noon. Otherwise, partly sunny, with a high near 78. Northeast wind 3 to 5 mph. Chance of precipitation is 20%.

Sunday Night

A slight chance of showers after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 20%.

Monday

A chance of showers after 2pm. Cloudy, with a high near 76. Chance of precipitation is 30%.

Monday Night

A chance of showers. Cloudy, with a low around 64. Chance of precipitation is 30%.

Tuesday

A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 30%.

Tuesday Night

Mostly cloudy, with a low around 60.

Wednesday

Partly sunny, with a high near 71.