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 >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Washington Manassas Airport (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

Fair

87°F

31°C

Humidity	55%
Wind Speed	SE 10 mph
Barometer	30.07 in (1018.6 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	91°F (33°C)
Last update	4 Aug 4:56 pm EDT

More Information:

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

Extended Forecast for

3 Miles SW The Plains VA

Tonight
Low: 68 °F
Mostly Cloudy
then Showers
Likely
Wednesday
High: 84 °F
Showers
Likely and
Patchy Fog
Wednesday Night
Low: 70 °F
Chance
T-storms then
Slight Chance
Showers
Thursday
High: 88 °F
Mostly Sunny
then Chance
T-storms
Thursday Night
Low: 69 °F
Chance
T-storms then
Slight Chance
Showers
Friday
High: 87 °F
Sunny then
Showers
Likely
Friday Night
Low: 68 °F
Showers
Likely then
Chance
T-storms
Saturday
High: 87 °F
Mostly Sunny
then Chance
T-storms
Saturday Night
Low: 68 °F
Chance
T-storms

Detailed Forecast

Tonight

A chance of showers before 2am, then a chance of showers and thunderstorms between 2am and 5am, then showers likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 68. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Wednesday

Showers and thunderstorms likely before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 84. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Wednesday Night

A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Mostly cloudy, then gradually becoming clear, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 30%.

Thursday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. South wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

Thursday Night

A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am. Partly cloudy, with a low around 69. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 30%.

Friday

Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 60%.

Friday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

Saturday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 50%.

Saturday Night

A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

Sunday

Mostly sunny, with a high near 88.

Sunday Night

Partly cloudy, with a low around 69.

Monday

Mostly sunny, with a high near 90.

Monday Night

A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.