Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

A Few Clouds

72°F

22°C

Humidity	100%
Wind Speed	S 5 mph
Barometer	30.01 in (1017.0 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	27 Aug 6:56 am EDT

More Information:

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

Extended Forecast for

2 Miles ENE Rossmoor MD

Today
High: 87 °F
Isolated
T-storms then
Severe
Thunderstorms
Tonight
Low: 68 °F
Severe
Thunderstorms
then
Scattered
Showers and
Patchy Fog
Friday
High: 85 °F
Partly Sunny
then Slight
Chance
T-storms
Friday Night
Low: 67 °F
Mostly Cloudy
Saturday
High: 85 °F
Mostly Sunny
Saturday Night
Low: 67 °F
Partly Cloudy
then Patchy
Fog
Sunday
High: 88 °F
Patchy Fog
then Mostly
Sunny
Sunday Night
Low: 71 °F
Partly Cloudy
Monday
High: 91 °F
Mostly Sunny

Detailed Forecast

Today

Scattered showers and thunderstorms before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then scattered showers and thunderstorms after 4pm. Some of the storms could be severe. Increasing clouds, with a high near 87. South wind 6 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.

Tonight

Showers and thunderstorms likely before 11pm, then scattered showers between 11pm and 2am. Some of the storms could be severe. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

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

Friday Night

Mostly cloudy, with a low around 67. Calm wind.

Saturday

Mostly sunny, with a high near 85. Light north wind.

Saturday Night

Patchy fog after 3am. Otherwise, partly cloudy, with a low around 67.

Sunday

Patchy fog before 7am. Otherwise, sunny, with a high near 88.

Sunday Night

Partly cloudy, with a low around 71.