DAYS 1-5 (MAY 2-6)

Upper level low pressure plagues our weather this weekend, but not to the point of “washing it out”. What happens are 3 things that can result in some rainfall. The first is a disturbance moving through from southwest to northeast today that results in a couple of rounds of showers, a few of which can be briefly on the heavier side. There will be dry hours in between, so if you are doing outside activity, keep an eye on the sky / radar. Tonight, a low pressure area will move rapidly northeastward, passing to our southeast, but close enough for a period of rain from the MA South Coast to South Shore and particularly Cape Cod and the Islands. This exits by Sunday’s dawn, and Sunday is a day that the sun tries to return but then triggers diurnal cloud development which can lead to some pop-up showers under a cold pool aloft. Changes come after that as the upper low pulls out to the east in a less-blocky, more progressive pattern. High pressure sides south of New England and off the Atlantic Coast, providing a southwesterly air flow and warming for Monday and Tuesday. It stays mild to warm Wednesday but the weather will turn unsettled at that time with the approach of a trough and frontal system from the west, so the shower (and possible thunderstorm) chances return at that time.

TODAY: Considerably cloudy, limited sun. Showers are most likely this morning but additional passing showers are possible this afternoon. Highs 55-62, coolest South Coast. Wind S 5-15 MPH.

TONIGHT: Mostly cloudy. A period of rain mainly MA South Coast to South Shore, favoring Cape Cod and Islands. Lows 45-52. Wind variable to NE 5-15 MPH, strongest over Cape Cod.

SUNDAY: Early-morning overcast southeastern MA otherwise some sunshine before clouds redevelop. Pop-up showers possible. Highs 54-61. Wind NW 5-15 MPH.

SUNDAY NIGHT: Clearing. Lows 42-49. Wind W 5-15 MPH.

MONDAY: Mostly sunny. Highs 58-65 South Coast, 65-72 elsewhere. Wind SW 5-15 MPH.

MONDAY NIGHT: Mostly clear. Patchy ground fog. Lows 48-55. Wind SW up to 10 MPH.

TUESDAY: Sunny to partly cloudy. Highs 58-65 South Coast, 65-72 interior CT / RI / MA South Shore / Cape Ann MA, 72-79 elsewhere. Wind SW 10-20 MPH.

TUESDAY NIGHT: Partly cloudy. Lows 51-58. Wind SW 5-15 MPH, higher gusts.

WEDNESDAY: Variably cloudy. Showers possible, chance of thunderstorms, favoring areas west of I-95. Highs 66-73 except cooler South Coast to MA South Shore. Wind SW 5-15 MPH, higher gusts.

DAYS 6-10 (MAY 7-11)

A trough of low pressure and frontal system brings a good chance of showers and possible thunderstorms on May 7 before it moves out and cooler weather with a few pop-up showers later next week. Fair weather and moderating temps late period. Trend is for a less blocked and slightly more progressive pattern overall.

DAYS 11-15 (MAY 12-16)

Some blocking returns with odds favoring our region on the cooler side of it, but with somewhat limited wet weather chances.