An area of low pressure will develop over the Mid-Atlantic states on Monday and ride northeastward toward our area Monday night and Tuesday morning.
This weather system will spread a shield of clouds and showers northeastward into New England over the course of the day on Monday and into Monday night, with embedded downpours and rumbles of thunder a good bet across parts of Southern New England and over the coastal waters.
With that in mind, expect a period of wet weather overnight Monday, ending early Tuesday morning, accompanied by some gusty north winds. Should an axis of downpours shift over the Cape, pockets of very heavy rain would be possible for a time Monday night.
The ECMWF model shows a widespread 1 to 2 inches of rain across the area. It’s likely that rainfall totals won’t be as uniform as shown here but that some location across the region do indeed see 1 to 2 inches of rain thanks to embedded tropical downpours.