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/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Partly Cloudy

98°F

37°C

Humidity	35%
Wind Speed	N 12 mph
Barometer	29.97 in (1014.7 mb)
Dewpoint	66°F (19°C)
Visibility	10.00 mi
Heat Index	102°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

Marlow Heights 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: 101 °F
Severe
Thunderstorms
Tonight
Low: 75 °F
Severe
Thunderstorms
then Chance
Showers
Sunday
High: 96 °F
Mostly Sunny
then Chance
T-storms
Sunday Night
Low: 72 °F
Showers then
Chance
Showers
Monday
High: 85 °F
Showers
Likely then
Showers
Monday Night
Low: 69 °F
Showers
Tuesday
High: 83 °F
Chance
Showers then
Chance
T-storms
Tuesday Night
Low: 69 °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 101. Heat index values as high as 109. Light and variable wind becoming west 5 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 1am, then a chance of showers. Some of the storms could be severe. Cloudy, then gradually becoming partly cloudy, with a low around 75. Southwest 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 96. Heat index values as high as 104. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.

Sunday Night

Showers and thunderstorms before 2am, then a chance of showers. Low around 72. Northeast wind 5 to 7 mph becoming north in the evening. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Showers likely, then showers and possibly a thunderstorm after 11am. High near 85. Northeast wind 3 to 5 mph. Chance of precipitation is 90%.

Monday Night

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

Tuesday

A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 83. 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 40%.

Wednesday

A slight chance of showers. Partly sunny, with a high near 86. 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 90. 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 93. Chance of precipitation is 30%.