NEW YORK (WABC) -- Multiple rounds of severe thunderstorms are expected to hit the Tri-State throughout the day, with potential to bring flash flooding, strong winds, and possible tornadoes. Torrential rain and dangerous flash flooding have already impacted parts of New Jersey and the NYC area.

Check out this dramatic moment heavy rain and flash flooding overwhelm a New York City subway station, turning the entrance stairs into a cascading waterfall. Isaac Boateng, from New York, USA captured the shocking scene inside a Brooklyn-bound 2 train at ...