Strong storms capable of producing damaging winds, downpours and isolated tornadoes are set to strike portions of the Northeast into Thursday night.
Stronger thunderstorms will rumble in the late afternoon across eastern Pennsylvania and Maryland before reaching major cities like Washington, D.C., Baltimore and Philadelphia into the evening.
Heavy rain may make for difficult travel. The thunderstorms were already causing flight delays at major hubs such as John F. Kennedy, Philadelphia International and Newark on Thursday afternoon.
"The main threats will be torrential downpours, flash flooding and wind gusts in excess of 50 mph and even some isolated tornadoes. Towards the Interstate 95 corridor, the threat will be centered around the region just after the evening rush," AccuWeather Meteorologist Steve Travis said.
UPDATES: (All times are listed in EDT)
5:09 p.m. EDT Thursday: Dark skies overhead in Washington, Pennsylvania.
Storms pushing through Washington, PA #stayalert pic.twitter.com/6hpQR6tPfP— Molly Cochran (@AccuCochran) July 9, 2015
4:43 p.m. EDT Thursday: A strong thunderstorm with damaging winds is heading towards Harrisburg, Gettysburg and York, Pennsylvania.
4:21 p.m. EDT Thursday: Strong storms moving towards State College, Pennsylvania.
It's getting dark outside. Storm approaching Happy Valley. #StateCollege pic.twitter.com/hfM15lvGgk— Jordan Root (@RootWx) July 9, 2015
4:17 p.m. EDT Thursday: Storm clouds rolled through Butler County, Pennsylvania.
@breakingweather 7/9/15 Observing severe in northern Butler Co, PA. pic.twitter.com/tKRgVPpytm— Laura Kosht (@herslaura) July 9, 2015
4:07 p.m. EDT Thursday: Work crews removed a downed tree on Route 322 outside of Phillipsburg, Pennsylvania.
1:45 p.m. EDT Thursday: Thunderstorms are causing flight delays up 80 minutes at Newark International, John F. Kennedy International, La Guardia and Philadelphia International airports, the FAA reports.