From Maryland and Delaware to Long Island and much of New England, beach erosion and tidal flooding will occur as the instigating Nor'easter track northeastward from the Delmarva to seas south of Cape Cod.
Winds to 60 mph will heap up waves to 20 feet over open seas. These will then pound beaches and coastal structures threatening further damage.
Piling up of water against the coast, timed near the New Moon, will lead to unusually high tides and some coastal flooding.
These serious coastal impacts will ease to the south and west overnight and early Sunday. But they will last through Sunday in eastern New England.
Story By AccuWeather.com Senior Meteorologist Jim Andrews.