Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Partly Cloudy

84°F

29°C

Humidity	65%
Wind Speed	W 9 mph
Barometer	29.98 in (1016.1 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	89°F (32°C)
Last update	10 Sep 12:56 pm EDT

More Information:

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

Extended Forecast for

Potomac MD

This Afternoon
High: 88 °F
Partly Sunny
Tonight
Low: 67 °F
Chance
T-storms then
Showers
Likely
Friday
High: 82 °F
Chance
Showers then
Partly Sunny
Friday Night
Low: 66 °F
Partly Cloudy
Saturday
High: 83 °F
Mostly Cloudy
then Chance
Showers
Saturday Night
Low: 69 °F
Showers
Likely
Sunday
High: 85 °F
Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 67 °F
Partly Cloudy
Monday
High: 84 °F
Mostly Sunny

Detailed Forecast

This Afternoon

Partly sunny, with a high near 88. West wind around 8 mph.

Tonight

Showers and thunderstorms likely before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Increasing clouds, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A chance of showers, mainly before 7am. Partly sunny, with a high near 82. North wind 3 to 6 mph. Chance of precipitation is 30%.

Friday Night

Partly cloudy, with a low around 66. Calm wind.

Saturday

A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 83. Southeast wind 5 to 7 mph. Chance of precipitation is 40%.

Saturday Night

A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 70%.

Sunday

A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 30%.

Sunday Night

Partly cloudy, with a low around 67.

Monday

Mostly sunny, with a high near 84.

Monday Night

Partly cloudy, with a low around 65.

Tuesday

Sunny, with a high near 87.

Tuesday Night

Mostly clear, with a low around 69.

Wednesday

A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 30%.