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.

Fair

86°F

30°C

Humidity	65%
Wind Speed	N 6 mph
Barometer	30.05 in (1018.1 mb)
Dewpoint	73°F (23°C)
Visibility	10.00 mi
Heat Index	93°F (34°C)
Last update	3 Sep 12:56 pm EDT

More Information:

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

Extended Forecast for

Haymarket VA

This Afternoon
High: 94 °F
Scattered
T-storms
Tonight
Low: 73 °F
Scattered
T-storms then
Scattered
Showers and
Patchy Fog
Friday
High: 91 °F
Patchy Fog
then Chance
T-storms
Friday Night
Low: 70 °F
Showers
Likely
Saturday
High: 84 °F
Slight Chance
Showers then
Chance
Showers
Saturday Night
Low: 63 °F
Chance
Showers then
Partly Cloudy
Sunday
High: 82 °F
Mostly Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Labor Day
High: 82 °F
Sunny

Detailed Forecast

This Afternoon

Isolated showers, then scattered showers and thunderstorms after 2pm. Partly sunny, with a high near 94. Heat index values as high as 102. West wind around 6 mph. Chance of precipitation is 30%.

Tonight

Scattered showers and thunderstorms before 3am, then isolated showers after 5am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 73. Calm wind. Chance of precipitation is 30%.

Friday

A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, increasing clouds, with a high near 91. Heat index values as high as 101. Calm wind becoming northwest 5 to 8 mph in the afternoon. Chance of precipitation is 50%.

Friday Night

Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 70. Light west wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

A chance of showers, with thunderstorms also possible after 5pm. Partly sunny, with a high near 84. North wind around 6 mph. Chance of precipitation is 50%.

Saturday Night

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

Sunday

Mostly sunny, with a high near 82.

Sunday Night

Mostly clear, with a low around 60.

Labor Day

Sunny, with a high near 82.

Monday Night

Partly cloudy, with a low around 61.

Tuesday

Mostly sunny, with a high near 86.