Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

80°F

27°C

Humidity	74%
Wind Speed	SE 6 mph
Barometer	29.94 in (1013.5 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	27 Aug 7:52 pm EDT

More Information:

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

Extended Forecast for

Vienna VASimilar City Names

Severe T-storm Watch August 27, 08:30pm until August 27, 10:00pm

Click here for hazard details and duration

...

Severe T-storm Watch August 27, 08:30pm until August 27, 10:00pm
NOW until 10:00pm Thu
Severe T-storm Watch
Tonight
Low: 69 °F
Severe
Thunderstorms
then
Scattered
Showers and
Patchy Fog
Friday
High: 86 °F
Patchy Fog
then Slight
Chance
T-storms
Friday Night
Low: 68 °F
Slight Chance
T-storms then
Slight Chance
Showers
Saturday
High: 87 °F
Mostly Sunny
Saturday Night
Low: 69 °F
Mostly Clear
Sunday
High: 89 °F
Sunny
Sunday Night
Low: 72 °F
Mostly Clear
Monday
High: 92 °F
Sunny

Detailed Forecast

Tonight

Showers likely and possibly a thunderstorm before 11pm, then scattered showers and thunderstorms between 11pm and 2am, then isolated showers after 2am. Some of the storms could be severe. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 69. Light south wind. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A slight chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 20%.

Friday Night

A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 68. Light north wind. Chance of precipitation is 20%.

Saturday

Mostly sunny, with a high near 87. North wind 3 to 5 mph.

Saturday Night

Mostly clear, with a low around 69. Light south wind.

Sunday

Sunny, with a high near 89.

Sunday Night

Mostly clear, with a low around 72.

Monday

Sunny, with a high near 92.

Monday Night

Partly cloudy, with a low around 74.