Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Northern Plains and Upper Midwest

Dangerous heat will remain across portions of the southern U.S. through the weekend. A heat wave over the Southwest will intensify this week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms will produce damaging winds and heavy rainfall over portions of the northern/central Plains into the mid/upper-Mississippi Valleys today. Read More >

Current conditions at

Washington/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Mostly Cloudy

84°F

29°C

Humidity	46%
Wind Speed	NW 14 G 23 mph
Barometer	29.84 in (1010.5 mb)
Dewpoint	61°F (16°C)
Visibility	10.00 mi
Heat Index	84°F (29°C)
Last update	30 Jul 1:52 pm EDT

More Information:

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

Extended Forecast for

Mc Lean VA

This Afternoon
High: 86 °F
Partly Sunny
Tonight
Low: 68 °F
Partly Cloudy
Friday
High: 89 °F
Sunny
Friday Night
Low: 70 °F
Partly Cloudy
Saturday
High: 91 °F
Partly Sunny
Saturday Night
Low: 72 °F
Mostly Cloudy
then Chance
Showers
Sunday
High: 85 °F
Showers
Likely
Sunday Night
Low: 70 °F
Showers
Likely
Monday
High: 86 °F
Chance
Showers then
Chance
T-storms

Detailed Forecast

This Afternoon

Partly sunny, with a high near 86. Northwest wind around 14 mph, with gusts as high as 23 mph.

Tonight

Partly cloudy, with a low around 68. Northwest wind around 6 mph becoming calm in the evening.

Friday

Sunny, with a high near 89. Northwest wind 3 to 5 mph.

Friday Night

Partly cloudy, with a low around 70. Light and variable wind.

Saturday

Partly sunny, with a high near 91. Calm wind becoming south 5 to 9 mph in the afternoon.

Saturday Night

A chance of showers after 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.

Sunday

A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.

Sunday Night

Showers likely and possibly a thunderstorm before 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Monday

A chance of showers and thunderstorms before 8am, then a slight chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 86. Chance of precipitation is 50%.

Monday Night

A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.

Tuesday

A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

Tuesday Night

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

Wednesday

A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.