Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

95°F

35°C

Humidity	46%
Wind Speed	Vrbl 6 mph
Barometer	29.99 in (1015.1 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	4 Jul 11:52 am EDT

More Information:

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

Extended Forecast for

3 Miles SSE Chantilly VA

Extreme Heat Warning until July 4, 09:00pm

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning until July 4, 09:00pm
NOW until 9:00pm Sat
Extreme Heat Warning
Independence Day
High: 98 °F
Severe
Thunderstorms
Tonight
Low: 73 °F
Severe
Thunderstorms
then
Scattered
Showers
Sunday
High: 93 °F
Mostly Sunny
then Chance
Showers
Sunday Night
Low: 71 °F
Showers
Monday
High: 86 °F
Chance
Showers then
Showers
Monday Night
Low: 69 °F
Showers
Tuesday
High: 84 °F
Slight Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 68 °F
Chance
T-storms then
Chance
Showers

Detailed Forecast

Independence Day

Showers and thunderstorms likely, mainly after 5pm. Some of the storms could be severe. Increasing clouds and hot, with a high near 98. Heat index values as high as 110. West wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tonight

Showers and thunderstorms likely before 2am, then isolated showers. Some of the storms could be severe. Mostly cloudy, with a low around 73. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers and thunderstorms, mainly after 4pm. Mostly sunny, with a high near 93. Heat index values as high as 102. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 30%.

Sunday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 71. East wind 3 to 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

Monday

A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 86. Northeast wind around 6 mph. Chance of precipitation is 80%.

Monday Night

Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 69. Chance of precipitation is 80%.

Tuesday

A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 50%.

Tuesday Night

A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.

Wednesday

A slight chance of showers before 8am, then a slight chance of showers after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 20%.

Wednesday Night

A chance of showers and thunderstorms, mainly between 8pm and 2am. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.

Thursday

A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.

Friday

A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.