Threats of Heavy Rainfall, Severe Thunderstorms and Dangerous Heat

Several complexes of thunderstorms, some severe with heavy rainfall, will impact areas from the northern Plains, Great Lakes, Ohio Valley to the mid-Atlantic. This threat will shift toward the Carolinas on Friday. Heavy rainfall, remnants of Edouard, continues for portions of eastern Texas through today. In-between these systems, a dome of high pressure and heat for central and eastern states. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Washington Manassas Airport (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

Overcast

74°F

23°C

Humidity	94%
Wind Speed	N 9 mph
Barometer	30.08 in (1019.1 mb)
Dewpoint	72°F (22°C)
Visibility	10.00 mi
Last update	3 Sep 7:56 am EDT

More Information:

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

Extended Forecast for

3 Miles NE Casanova VA

Today
High: 95 °F
Scattered
Showers then
Showers
Likely
Tonight
Low: 73 °F
Showers
Likely then
Scattered
Showers
Friday
High: 94 °F
Scattered
Showers then
Showers
Likely
Friday Night
Low: 71 °F
Showers
Likely
Saturday
High: 85 °F
Mostly Sunny
then Chance
Showers
Saturday Night
Low: 63 °F
Chance
Showers then
Partly Cloudy
Sunday
High: 84 °F
Sunny
Sunday Night
Low: 59 °F
Mostly Clear
Labor Day
High: 83 °F
Sunny

Detailed Forecast

Today

Scattered showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 104. West wind 3 to 8 mph. 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 11pm. Partly cloudy, with a low around 73. West wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Scattered showers, then showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 102. Light west wind becoming northwest 5 to 9 mph in the morning. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

Showers likely and possibly a thunderstorm before 8pm, then scattered showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Mostly cloudy, with a low around 71. Northwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. North wind 6 to 9 mph. Chance of precipitation is 40%.

Saturday Night

A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Chance of precipitation is 30%.

Sunday

Sunny, with a high near 84.

Sunday Night

Mostly clear, with a low around 59.

Labor Day

Sunny, with a high near 83.

Monday Night

Partly cloudy, with a low around 61.

Tuesday

Mostly sunny, with a high near 87.