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

Severe Thunderstorm Watch until August 27, 10:00 PM EDT

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Thunderstorm Light Rain

76°F

24°C

Humidity	77%
Wind Speed	NE 5 mph
Barometer	29.95 in (1014.0 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Heat Index	77°F (25°C)
Last update	27 Aug 8:52 pm EDT

More Information:

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

Extended Forecast for

2 Miles N Catharpin VA

Severe T-storm Watch August 27, 09:19pm until August 27, 10:00pm

Click here for hazard details and duration

...

Severe T-storm Watch August 27, 09:19pm until August 27, 10:00pm
NOW until 10:00pm Thu
Severe T-storm Watch
Tonight
Low: 67 °F
Severe
Thunderstorms
then Isolated
Showers and
Patchy Fog
Friday
High: 87 °F
Patchy Fog
then Slight
Chance
T-storms
Friday Night
Low: 66 °F
Mostly Cloudy
Saturday
High: 87 °F
Mostly Sunny
Saturday Night
Low: 68 °F
Mostly Clear
Sunday
High: 90 °F
Sunny
Sunday Night
Low: 70 °F
Partly Cloudy
Monday
High: 92 °F
Sunny

Detailed Forecast

Tonight

Showers and thunderstorms likely before 1am, then isolated showers after 4am. Some of the storms could be severe. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 67. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

A slight chance of showers before 2pm, then a slight chance of showers and thunderstorms between 2pm and 3pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 87. Calm wind becoming north around 5 mph in the morning. Chance of precipitation is 20%.

Friday Night

Mostly cloudy, with a low around 66. Calm wind.

Saturday

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

Saturday Night

Mostly clear, with a low around 68. Southeast wind around 5 mph becoming calm in the evening.

Sunday

Sunny, with a high near 90.

Sunday Night

Partly cloudy, with a low around 70.

Monday

Sunny, with a high near 92.