Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

86°F

30°C

Humidity	49%
Wind Speed	W 10 G 18 mph
Barometer	29.84 in (1010.1 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	22 Jul 1:52 pm EDT

More Information:

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

Extended Forecast for

Great Falls VA

This Afternoon
High: 84 °F
Chance
T-storms
Tonight
Low: 63 °F
Mostly Cloudy
Thursday
High: 79 °F
Becoming
Sunny
Thursday Night
Low: 60 °F
Mostly Clear
Friday
High: 81 °F
Mostly Sunny
Friday Night
Low: 63 °F
Partly Cloudy
Saturday
High: 81 °F
Mostly Sunny
Saturday Night
Low: 65 °F
Partly Cloudy
then Slight
Chance
Showers
Sunday
High: 84 °F
Mostly Sunny
then Chance
Showers

Detailed Forecast

This Afternoon

A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 84. West wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 30%.

Tonight

Mostly cloudy, with a low around 63. North wind 5 to 7 mph.

Thursday

Partly sunny, then gradually becoming sunny, with a high near 79. North wind 5 to 7 mph.

Thursday Night

Mostly clear, with a low around 60. Calm wind.

Friday

Mostly sunny, with a high near 81. Calm wind becoming east 5 to 7 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 63.

Saturday

Mostly sunny, with a high near 81.

Saturday Night

A slight chance of showers after 2am. Partly cloudy, with a low around 65. Chance of precipitation is 20%.

Sunday

A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 30%.

Sunday Night

A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 67. Chance of precipitation is 30%.

Monday

A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 40%.

Monday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.

Tuesday

A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 50%.