Heat and Severe Thunderstorms in the Eastern U.S.

A widespread heat wave will peak over the South and East today, with several dozen temperature records expected along the East Coast. Heat should begin to ease this weekend in the Northeast, while hazardous heat continues over the South. Severe thunderstorms capable of damaging winds are possible across parts of the Appalachians, Mid Atlantic, and Northeast this afternoon and evening. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

93°F

34°C

Humidity	46%
Wind Speed	W 14 mph
Barometer	29.80 in (1009.8 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	98°F (37°C)
Last update	12 Jun 4:56 pm EDT

More Information:

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

Extended Forecast for

Rockville MD

Severe T-storm Watch until June 12, 09:00pm

Click here for hazard details and duration

Severe T-storm Watch

Severe T-storm Watch until June 12, 09:00pm
NOW until 9:00pm Fri
Severe T-storm Watch
This Afternoon
High: 95 °F
Severe
Thunderstorms
Tonight
Low: 65 °F
Severe
Thunderstorms
then Partly
Cloudy
Saturday
High: 86 °F
Sunny
Saturday Night
Low: 66 °F
Mostly Clear
Sunday
High: 89 °F
Slight Chance
Showers then
Showers
Sunday Night
Low: 63 °F
Showers then
Chance
Showers
Monday
High: 78 °F
Mostly Sunny
Monday Night
Low: 59 °F
Mostly Cloudy

Detailed Forecast

This Afternoon

A chance of showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 95. West wind around 10 mph, with gusts as high as 24 mph. Chance of precipitation is 40%.

Tonight

A chance of showers and thunderstorms, mainly before 9pm. Some of the storms could be severe. Mostly cloudy, then gradually becoming mostly clear, with a low around 65. Northwest wind around 7 mph. Chance of precipitation is 30%.

Saturday

Sunny, with a high near 86. Northwest wind 3 to 5 mph.

Saturday Night

Mostly clear, with a low around 66. Calm wind.

Sunday

A slight chance of showers, then showers and possibly a thunderstorm after 2pm. High near 89. South wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

Sunday Night

Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 63. Chance of precipitation is 80%.

Monday

Mostly sunny, with a high near 78.

Monday Night

Mostly cloudy, with a low around 59.

Tuesday

A slight chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 20%.

Tuesday Night

A slight chance of showers. Partly cloudy, with a low around 60. Chance of precipitation is 20%.

Wednesday

A slight chance of showers. Mostly sunny, with a high near 82. Chance of precipitation is 20%.

Wednesday Night

A slight chance of showers. Partly cloudy, with a low around 64. Chance of precipitation is 20%.