Dangerous Surf and Rip Currents for most of the Atlantic Shoreline; Record Heat for the West

Hurricane Erin continues to track northward. Tropical storm force winds, storm surge conditions will increase for the Outer Banks today and portions of coastal Virginia. Life-threatening surf and rip currents along much of the east coast of the U.S. this week. Major to extreme HeatRisk with new record high temperatures are expected for many areas of the western U.S. this week. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

70°F

21°C

Humidity	NA
Wind Speed	Calm
Barometer	30.01 in (1017.2 mb)
Dewpoint	N/A
Visibility	10.00 mi
Last update	20 Aug 9:56 am EDT

More Information:

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

Extended Forecast for

Potomac MD

Today
High: 86 °F
Mostly Cloudy
then Chance
T-storms
Tonight
Low: 69 °F
Chance
T-storms and
Patchy Fog
Thursday
High: 78 °F
Chance
Showers and
Patchy Fog
Thursday Night
Low: 63 °F
Decreasing
Clouds
Friday
High: 82 °F
Sunny
Friday Night
Low: 62 °F
Mostly Clear
Saturday
High: 83 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Partly Cloudy
Sunday
High: 84 °F
Partly Sunny
then Chance
T-storms

Detailed Forecast

Today

A chance of thunderstorms, mainly after 5pm. Partly sunny, with a high near 86. Southeast wind around 6 mph. Chance of precipitation is 30%.

Tonight

A chance of showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Patchy fog between 2am and 5am. Otherwise, mostly cloudy, with a low around 69. Northeast wind around 8 mph. Chance of precipitation is 40%.

Thursday

A chance of showers after 8am. Patchy fog between 8am and 11am. Otherwise, mostly cloudy, with a high near 78. Northeast wind 10 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Thursday Night

Mostly cloudy, then gradually becoming mostly clear, with a low around 63. North wind 7 to 10 mph.

Friday

Sunny, with a high near 82. North wind 6 to 8 mph.

Friday Night

Mostly clear, with a low around 62.

Saturday

Mostly sunny, with a high near 83.

Saturday Night

Partly cloudy, with a low around 67.

Sunday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

Sunday Night

A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.

Monday

Mostly sunny, with a high near 82.

Monday Night

Mostly clear, with a low around 59.

Tuesday

Sunny, with a high near 77.