Heat Persists in the Southwest; Elevated to Critical Fire Weather in the Great Basin; Poor Air Quality in the West

Dangerous heat will persist across the Southwest U.S. through this week, easing by next week. The heat will focus further east in the Great Plains and Mississippi Valley beginning next week. Elevated to locally critical fire weather conditions will persist for the Great Basin today. Poor air quality lingers for the Northwest, Great Basin, Central Rockies into the Plains. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

76°F

24°C

Humidity	64%
Wind Speed	Vrbl 6 mph
Barometer	30.09 in (1018.5 mb)
Dewpoint	63°F (17°C)
Visibility	10.00 mi
Heat Index	78°F (26°C)
Last update	4 Aug 9:52 am EDT

More Information:

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

Extended Forecast for

2 Miles ESE Great Falls VA

Today
High: 86 °F
Partly Sunny
Tonight
Low: 71 °F
Slight Chance
T-storms then
Chance
Showers
Wednesday
High: 85 °F
Showers
Likely
Wednesday Night
Low: 73 °F
Chance
T-storms then
Slight Chance
Showers
Thursday
High: 90 °F
Mostly Sunny
then Slight
Chance
T-storms
Thursday Night
Low: 74 °F
Slight Chance
T-storms then
Slight Chance
Showers
Friday
High: 90 °F
Mostly Sunny
then Chance
T-storms
Friday Night
Low: 72 °F
Chance
T-storms
Saturday
High: 89 °F
Mostly Sunny
then Chance
T-storms

Detailed Forecast

Today

Partly sunny, with a high near 86. East wind around 6 mph.

Tonight

A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

Wednesday

Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 4pm, then showers likely and possibly a thunderstorm after 4pm. Mostly cloudy, with a high near 85. Light and variable wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Wednesday Night

A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 73. South wind 3 to 5 mph. Chance of precipitation is 30%.

Thursday

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. South wind 7 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Thursday Night

A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 74. Chance of precipitation is 20%.

Friday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

Friday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.

Saturday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 50%.

Saturday Night

A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.

Sunday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 73.