Severe Storms and Heavy Rain in Texas; Record Heat Along the East Coast

Scattered severe storms with large hail, isolated severe gusts, and localized flooding are expected across parts of west Texas. Isolated flash flooding is also possible in the central Gulf coast. An early season heat wave will continue to impact the eastern U.S. today, before isolated severe storms move across the central Appalachians into the Mid-Atlantic and far southern New England. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

89°F

32°C

Humidity	43%
Wind Speed	NW 13 G 20 mph
Barometer	30.00 in (1016.6 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	90°F (32°C)
Last update	20 May 3:56 pm EDT

More Information:

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

Extended Forecast for

Potomac MD

Severe T-storm Watch May 20, 05:06pm until May 20, 08:00pm

Click here for hazard details and duration

Severe T-storm Watch

Severe T-storm Watch May 20, 05:06pm until May 20, 08:00pm
NOW until 8:00pm Wed
Severe T-storm Watch
This Afternoon
High: 94 °F
Severe
Thunderstorms
Tonight
Low: 58 °F
Severe
Thunderstorms
then Showers
Thursday
High: 65 °F
Showers
Thursday Night
Low: 53 °F
Chance
Showers then
Cloudy
Friday
High: 63 °F
Showers
Friday Night
Low: 50 °F
Showers
Saturday
High: 64 °F
Showers
Saturday Night
Low: 53 °F
Showers

Detailed Forecast

This Afternoon

Showers and thunderstorms likely. Some of the storms could be severe. Cloudy, with a high near 94. West wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms before 5am, then a chance of showers. Some of the storms could be severe. Low around 58. North wind 6 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

Showers likely, then showers and possibly a thunderstorm after 11am. High near 65. Northeast wind 9 to 13 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

A chance of showers, mainly before 9pm. Cloudy, with a low around 53. Northeast wind 6 to 9 mph. Chance of precipitation is 30%.

Friday

Showers, mainly after 8am. High near 63. East wind 8 to 11 mph. Chance of precipitation is 80%.

Friday Night

Showers. Low around 50. Chance of precipitation is 90%.

Saturday

Showers. High near 64. Chance of precipitation is 80%.

Saturday Night

Showers. Low around 53. Chance of precipitation is 80%.

Sunday

Showers likely, mainly before 8am. Mostly cloudy, with a high near 76. Chance of precipitation is 60%.