The satellite tells the story nicely this evening, an area of low pressure developing well off of the east coast is actually turning NW and will move towards the forecast area later tonight through tomorrow, we don’t see this happen very often, its pretty rare for a storm system well out into the Atlantic to move NW into our area, especially outside of hurricane season
Theres a ridge over the eastern US which is now tilting SE to NW due to a block over the North Atlantic, and so moisture is streaming SE to NW as well
Showers developing off of the coast will move onshore late tonight though early afternoon tomorrow from SE to NW, and increasing easterly winds, keep in mind this system isn’t real strong and much of the precipitation will be showery in nature, besides a period of steady rain late tomorrow afternoon and evening along the immediate NJ coast and Long Island into CT .
With moisture streaming in from the Atlantic though any rain has the potential to be heavy
Here is Monday morning with showers and light rain filling in to the area, that heavy batch of rain off the coast will move NNW and hit coastal NJ to Long Island leading to heavy rain in those locations
Tomorrow afternoon through early Tuesday AM a steadier rain will take hold along coastal areas
So tomorrow basically expect waves of showers to move in off the Atlantic, some of the rain could be heavy, especially for coastal areas, rain gradually gets lighter as you move inland,also expect winds from the East at 15-25 mph and total rainfall from this system to range from 0.10 to 0.25 inland (East PA) to as much as 1-1.25 along the coast
A cold front to the west will move east and proceed to stall along the coast, leading to waves of showers on and off from Tuesday night through Thursday with isolated thunderstorms possible and locally heavy rain, more on that tomorrow