Heavy Rainfall and Severe Thunderstorms in the Midwest and Ohio Valley Tuesday

Multiple rounds of severe thunderstorms appear likely Tuesday across the Midwest and Ohio Valley, with severe wind gusts in excess of 75 mph as the primary threat. Heavy to excessive rainfall may lead to considerable flash and urban flooding impacts Tuesday across portions of the Ohio Valley. A Moderate Risk (level 3 of 4) of excessive rainfall has been issued. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

70°F

21°C

Humidity	NA
Wind Speed	SW 3 mph
Barometer	30.02 in (1017.4 mb)
Dewpoint	N/A
Visibility	10.00 mi
Last update	10 Aug 11:56 pm EDT

More Information:

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

Extended Forecast for

Ashton-Sandy Spring MD

Overnight
Low: 72 °F
Mostly Cloudy
Tuesday
High: 88 °F
Partly Sunny
then Showers
Likely
Tuesday Night
Low: 68 °F
Showers
Likely then
Chance
Showers
Wednesday
High: 85 °F
Partly Sunny
then Slight
Chance
T-storms
Wednesday Night
Low: 69 °F
Chance
Showers
Thursday
High: 87 °F
Slight Chance
Showers then
Slight Chance
T-storms
Thursday Night
Low: 70 °F
Chance
Showers
Friday
High: 82 °F
Chance
Showers
Friday Night
Low: 64 °F
Partly Cloudy

Detailed Forecast

Overnight

Mostly cloudy, with a low around 72. West wind 3 to 5 mph.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 88. West wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night

Showers and thunderstorms likely before 3am, then a chance of showers after 5am. Mostly cloudy, with a low around 68. West 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.

Wednesday

A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Northwest wind around 6 mph. Chance of precipitation is 20%.

Wednesday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 40%.

Thursday

A slight chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 20%.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

Friday

A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%.

Friday Night

Partly cloudy, with a low around 64.

Saturday

Mostly sunny, with a high near 82.