Massive Heat Wave; Severe Storms and Heavy Rain

A massive heat wave is consuming much of the Midwest into the Southern tier of the U.S. with hazy, hot and humid conditions. These dangerous conditions will likely persist through Thursday as widespread excessive heat warnings and heat advisories are in effect. North and east of the heat and area of high pressure, thunderstorms with damaging and severe winds, large hail and heavy rain are likely. Read More >

Hazardous Weather Conditions

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Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

71°F

22°C

Humidity	94%
Wind Speed	Calm
Barometer	29.90 in (1012.1 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Last update	6 Jul 5:52 am EDT

More Information:

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

Extended Forecast for

Reston VA

Flood Watch July 6, 03:00pm until July 7, 03:00am

Click here for hazard details and duration

Flood Watch

Today

Isolated
Showers then
Heavy Rain
High: 88 °F
Tonight

Heavy Rain
and Patchy
Fog
Low: 73 °F
Thursday

Chance
T-storms and
Patchy Fog
then Showers
Likely
High: 82 °F
Thursday
Night

Showers
Likely then
Chance
T-storms
Low: 72 °F
Friday

Chance
Showers then
Showers
Likely
High: 83 °F
Friday
Night

Showers
Likely then
Chance
T-storms
Low: 70 °F
Saturday

Chance
Showers
High: 79 °F
Saturday
Night

Partly Cloudy
Low: 62 °F
Sunday

Sunny
High: 79 °F

Detailed Forecast

Today

Scattered showers before 2pm, then scattered showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rain. Partly sunny, with a high near 88. Northwest wind 3 to 8 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 likely and possibly a thunderstorm before 8pm, then showers and thunderstorms likely, mainly between 8pm and 11pm. Some of the storms could produce heavy rain. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 73. Northeast wind around 5 mph becoming calm after midnight. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 82. Calm wind becoming northeast around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 72. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Northwest wind around 6 mph. Chance of precipitation is 70%.

Friday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms after 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

Saturday

A chance of showers. Partly sunny, with a high near 79. Chance of precipitation is 40%.

Saturday Night

Partly cloudy, with a low around 62.

Sunday

Sunny, with a high near 79.

Sunday Night

Mostly clear, with a low around 62.

Monday

Sunny, with a high near 82.

Monday Night

Mostly clear, with a low around 67.