A strengthening low pressure center will ride northeastward through the Northeast and New England tonight and tomorrow, swinging a strong cold front eastward across the region. This frontal boundary will approach our area Sunday morning and sweep offshore Sunday afternoon.
Prior to the frontal passage, we can expect numerous showers with embedded downpours and even a few thunderstorms to be racing north and eastward across the region first thing Sunday morning, with the bulk of the wet weather shifting offshore during the mid to late morning hours. While the event overall will be relatively short-lived, a quick 1/2 to 1 inch of rain is possible in spots as a few hefty downpours are likely to pass through at times.
At the same time the wet weather engulfs the area, a period of strong south and southwest winds is expected over the Cape and Islands. A strong low level jet stream will develop ahead of approaching weather system and shift through the area in tandem with the rainfall. Wind gusts in excess of 40 mph are a good bet for a time Sunday morning, with a few isolated gusts to 50 mph in spots. This may result in some brief power disruptions thanks to some scattered minor limb damage here and there.
There is a chance – albeit rather small – that a squall line develops within the approaching band of showers Sunday morning. If such a line were to take shape, a short-lived period of very heavy rain with some thunder and lightning and strong gusty winds would be possible.
The good news is…things will dry out quickly behind the front and sunshine should take hold for the second half of Sunday. Gusty west and northwest winds will develop and cold air will pour back into the area.