A Thunderstorm Warning is in effect for parts New Jersey, and a watch is in effect for most of the Tri-State.
New York City is warning people to stay out of the water at a dozen beaches because of elevated bacteria levels after all of the rain this week.
Both Nassau and Suffolk counties are under a state of emergency on Long Island.
A flash flood warning was issued for parts of the region as heavy rain and thunderstorms moved through the area.
El Niño is expected to develop soon and could be the strongest on record, bringing with it more extreme weather. While the models indicate that this may be a strong event, the WMO cautioned that the models also have a harder time making accurate forecasts in the spring.
Windy weather overnight knocked part of a tree into a roadway in Mount Pleasant, Westchester County, leaving branches dangling into traffic and setting the stage for a deadly crash during the morning commute.