Tracking Storm System Across the Eastern U.S.

A storm system will continue to produce widespread showers and thunderstorms as it progresses eastward across the central U.S. into the Northeast through the weekend. There are risks of severe thunderstorms and excessive rainfall on Saturday from the Ozarks into the mid-Mississippi River Valley with potential for damaging winds, large hail, tornadoes, and flash flooding. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

69°F

21°C

Humidity	51%
Wind Speed	S 7 mph
Barometer	29.98 in (1016.4 mb)
Dewpoint	50°F (10°C)
Visibility	10.00 mi
Last update	18 Oct 5:56 pm EDT

More Information:

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

Extended Forecast for

Potomac MD

Tonight
Low: 55 °F
Increasing
Clouds
Sunday
High: 76 °F
Partly Sunny
Sunday Night
Low: 50 °F
Showers
Monday
High: 63 °F
Showers
Likely then
Slight Chance
Showers
Monday Night
Low: 41 °F
Clear
Tuesday
High: 68 °F
Sunny
Tuesday Night
Low: 47 °F
Partly Cloudy
Wednesday
High: 62 °F
Mostly Sunny
Wednesday Night
Low: 42 °F
Mostly Clear

Detailed Forecast

Tonight

Increasing clouds, with a low around 55. Southeast wind 3 to 6 mph.

Sunday

Partly sunny, with a high near 76. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 32 mph.

Sunday Night

Showers and possibly a thunderstorm before 2am, then showers likely. Low around 50. South wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Monday

Showers likely, mainly before 8am. Mostly cloudy, then gradually becoming sunny, with a high near 63. West wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Monday Night

Clear, with a low around 41. West wind around 6 mph becoming calm in the evening.

Tuesday

Sunny, with a high near 68.

Tuesday Night

Partly cloudy, with a low around 47.

Wednesday

Mostly sunny, with a high near 62.

Wednesday Night

Mostly clear, with a low around 42.

Thursday

Sunny, with a high near 59.