Updated at 6:39 p.m.
All three major airports across Washington, D.C., Maryland and Virginia are under a ground stop until at least 8:30 p.m. as the region is expected to see severe weather.
A National Weather Service advisory has all of D.C. and the majority of Maryland and Northern Virginia under a severe thunderstorm watch through at least 10 p.m.
"Damaging wind gusts are the primary threat, although large hail and a tornado are possible," reads the latest alert. "A few instances of flash flooding are also possible."
A flash flood watch was issued for areas along Interstate 64 in central Virginia through 2 a.m. Wednesday.
An updated timeline released by officials indicates storms are expected to begin impacting the region between 4 p.m. and 9 p.m., with additional rounds expected to go into the night.
AccuWeather reported that wind gusts could get up to 85 mph, adding that rainfall rates could be 2 inches per hour or more during the worst of the storms.
Tuesday Afternoon: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Some of the storms could be severe. High near 91. Heat index values as high as 101. Southwest wind around 13 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night: Showers and possibly a thunderstorm, mainly before 5am, then isolated showers and thunderstorms after 5am. Some of the storms could be severe. Low around 72. Southwest wind 8 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. West wind 7 to 11 mph. Chance of precipitation is 50%.
Wednesday Night: A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 65. North wind around 8 mph. Chance of precipitation is 30%.
Thursday: Mostly sunny, with a high near 81. North wind 8 to 10 mph.
Thursday Night: Partly cloudy, with a low around 64.
Friday: Sunny, with a high near 81.
Friday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 20%.
Saturday: A slight chance of showers. Partly sunny, with a high near 81. Chance of precipitation is 20%.
Saturday Night: Partly cloudy, with a low around 66.
Sunday: A slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 20%.
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