Heat and Fire Weather Concerns in the West; Excessive Rainfall Possible in the South-Central U.S.

Heat will build over the Intermountain West and the Southwest the next couple of days. Lightning from dry thunderstorms can create new fire starts and combined with gusty winds may cause a fire to rapidly grow in Oregon and northern California. Flash flooding will be possible in Arizona and west Texas today, as well as parts of the southern and central Plains due to slow moving thunderstorms. 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

82°F

28°C

Humidity	77%
Wind Speed	SW 5 mph
Barometer	30.00 in (1015.5 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	30 Jun 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: 90 °F
Slight Chance
T-storms then
T-storms
Likely
Tonight
Low: 75 °F
T-storms
Likely then
Partly Cloudy
Tuesday
High: 89 °F
Chance
Showers then
Heavy Rain
Tuesday Night
Low: 70 °F
Heavy Rain
then Showers
Likely
Wednesday
High: 85 °F
Sunny
Wednesday Night
Low: 69 °F
Mostly Clear
Thursday
High: 87 °F
Sunny
Thursday Night
Low: 67 °F
Mostly Clear
Independence Day
High: 83 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms likely, mainly after 3pm. Partly sunny, with a high near 90. Calm wind becoming south 5 to 8 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.

Tonight

Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 75. Southeast wind around 6 mph becoming southwest 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.

Tuesday

A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 89. Southwest wind around 8 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday Night

Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Some of the storms could produce heavy rainfall. Low around 70. Southwest wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Wednesday

Sunny, with a high near 85. Northwest wind around 6 mph.

Wednesday Night

Mostly clear, with a low around 69.

Thursday

Sunny, with a high near 87.

Thursday Night

Mostly clear, with a low around 67.

Independence Day

Sunny, with a high near 83.

Friday Night

Mostly clear, with a low around 66.