Severe Thunderstorms in the Ohio and Tennessee Valleys; Flash Flooding Possible in the Southwest

Scattered damaging winds, isolated severe hail, and a brief tornado or two are possible from the Upper Ohio to Tennessee Valleys during the late afternoon and evening. Across the Southwest, monsoonal moisture will continue to bring heavy rain and a threat for isolated to scattered flash flooding through Saturday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

77°F

25°C

Humidity	66%
Wind Speed	SE 5 mph
Barometer	29.97 in (1015.7 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Heat Index	79°F (26°C)
Last update	5 Sep 9:56 pm EDT

More Information:

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

Extended Forecast for

Dayton MD

Tonight
Low: 68 °F
Partly Cloudy
Saturday
High: 85 °F
Mostly Sunny
then Showers
Likely
Saturday Night
Low: 58 °F
Showers
Likely
Sunday
High: 73 °F
Gradual
Clearing
Sunday Night
Low: 51 °F
Mostly Clear
Monday
High: 73 °F
Sunny
Monday Night
Low: 50 °F
Mostly Clear
Tuesday
High: 73 °F
Sunny
Tuesday Night
Low: 53 °F
Partly Cloudy

Detailed Forecast

Tonight

Partly cloudy, with a low around 68. South wind around 5 mph.

Saturday

A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 3pm, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 85. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday Night

Showers likely and possibly a thunderstorm before 7pm, then a chance of showers and thunderstorms between 7pm and 11pm, then a chance of showers after 11pm. Cloudy, with a low around 58. North wind 3 to 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

Cloudy through mid morning, then gradual clearing, with a high near 73. Northwest wind around 6 mph.

Sunday Night

Mostly clear, with a low around 51. Northwest wind 3 to 5 mph.

Monday

Sunny, with a high near 73.

Monday Night

Mostly clear, with a low around 50.

Tuesday

Sunny, with a high near 73.

Tuesday Night

Partly cloudy, with a low around 53.