The watch, which was issued to alert people to the possibility that a tornado could develop in the area, was supposed to remain in effect until 6 p.m., but was canceled just after 5 p.m.
All of New Jersey and the eastern quarter of Pennsylvania also were included. Some suburban after-school activities were canceled as a precaution.
A watch means conditions are favorable for tornadoes and severe thunderstorms. A more severe tornado warning would mean that tornado activity -- turning or rotation -- has already been spotted by radar.
Forecasters had said wind gusts up to 70 mph, hail and lightning are possible.
The latest storm activity comes as many neighborhoods are still recovering the two tornadoes and macroburst which slammed New Jersey and caused severe damage across a 14-mile stretch from Brooklyn to Queens. A woman in a car was killed. It was the city's ninth and 10th tornadoes since 1950.