From the NWS NYC Office

A Flood Watch remains in effect until 5PM Tuesday across the entire Tri-State area.

Overview:

A nearly stationary front will remain in the vicinity of Southern Connecticut into Central New Jersey through Tuesday. 

Rain showers with possible thunderstorms are expected through this evening. The rain showers remain overnight and into Tuesday. The rain showers could be heavy at times and could slowly move over the same areas, resulting in flash flooding. 

Timing: Through Tuesday afternoon

Locations: The entire Tri-State area

Impacts: Mainly localized flash flooding of most vulnerable urbanized and poor drainage areas.