Avoid the beach and consider moving your Memorial Day cookout indoors, Storm Team 4 says.
The hot, sunny weather enjoyed by throngs of beach-goers during the weekend came to a close after midnight when rain clouds move into the area from the southwest.
The National Weather Service issued a flood advisory for the New York City area until 7:30 a.m. Monday.
More than an inch of rain had already fallen at Central Park by 6 a.m. Monday, and more than 1.5 inches of rain had fallen at Newark Airport.
The messy weather has led to a number of Memorial Day parade cancellations.
Expect the heavy rain to continue Monday morning, with lightning and thunder in some areas.
The rains should subside by lunchtime, but showers and storms are possible in the early evening and scattered storms will persist.
The skies will clear Monday night and the sun is expected to return Tuesday and deliver more 80-degree temperatures. Expect more of the same on Wednesday.
As for Tropical Storm Bonnie, Storm Team 4 says slow-moving remnants of the storm will ease northward, but remain mostly offshore. But it could bring a bit of rain or a storm to the region on Thursday or Friday.