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

Fort Belvoir (KDAA)

Lat: 38.72°NLon: 77.18°WElev: 69ft.

Fair

97°F

36°C

Humidity	40%
Wind Speed	Calm
Barometer	29.94 in (1014.1 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	103°F (39°C)
Last update	4 Jul 11:55 am EDT

More Information:

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

Extended Forecast for

Accokeek MD

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: 97 °F
Severe
Thunderstorms
Tonight
Low: 75 °F
Severe
Thunderstorms
then
Scattered
Showers
Sunday
High: 92 °F
Mostly Sunny
then Chance
T-storms
Sunday Night
Low: 73 °F
Showers
Likely
Monday
High: 83 °F
Chance
Showers then
Showers
Monday Night
Low: 71 °F
Showers
Tuesday
High: 81 °F
Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 69 °F
Chance
T-storms then
Chance
Showers

Detailed Forecast

Independence Day

Scattered showers and thunderstorms after 4pm. Some of the storms could be severe. Increasing clouds and hot, with a high near 97. Heat index values as high as 106. Calm wind becoming west around 6 mph. Chance of precipitation is 30%.

Tonight

Showers and thunderstorms likely before 2am, then isolated showers between 2am and 3am. Some of the storms could be severe. Mostly cloudy, with a low around 75. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 92. Light southeast wind. Chance of precipitation is 30%.

Sunday Night

A chance of showers and thunderstorms before 7pm, then showers likely and possibly a thunderstorm between 7pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 73. East wind 3 to 7 mph. Chance of precipitation is 70%. 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 83. Northeast wind 3 to 5 mph. Chance of precipitation is 80%.

Monday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 71. Chance of precipitation is 80%.

Tuesday

A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 81. 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 69. Chance of precipitation is 30%.

Wednesday

A slight chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 20%.

Wednesday Night

A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 70. Chance of precipitation is 20%.

Thursday

A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 30%.

Thursday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 30%.

Friday

A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 30%.