9:12AM
SUMMARY…
Arctic high pressure approaches then crests overhead today with bright sun, cold, and diminishing wind. High pressure moves offshore to the east tonight, southerly flow develops, temperatures rise, and clouds increase. A cold front approaches from the west with milder southerly flow ahead of it, but rapidly developing low pressure along the Mid Atlantic Coast will move northward and link up with the front, bringing an increasing risk of rain, first to the west, then swinging eastward through Sunday night. Some of the heaviest rain from this system may coincide with part of the AFC Championship Game in Foxboro MA between the Patriots and Colts. The center of low pressure will pass across eastern MA overnight and rocket away into Maine and eventually southeastern Canada. Rain will shut off rapidly from southwest to northeast before cold enough air arrives to switch it to snow in all areas of central MA and southern NH south and east, with the exception of some of the higher elevations in southwestern NH. Monday, the MLK Jr holiday, will feature sun and clouds, windy, and cool weather, though the air mass behind this system will not be as cold as some of the recent cold we have seen here. High pressure to the west and low pressure still exerting influence on this area from Canada will bring a bright but chilly and gusty day Tuesday. I’m a little conflicted on how to look at what happens from Wednesday through Saturday of next week. Current thoughts are that low pressure coming out of the Great Lakes will fall apart Wednesday which will be a variably cloudy day with spotty light snow at moist, and a second low pressure wave will develop offshore Thursday which may end up a cloudier day here but precipitation getting near the South Coast but staying offshore for the most part. If this scenario were to play out, Friday would likely end up fair, breezy, and chilly. Long way to go to work out the details from midweek on. Computer guidance will have some difficulty as we are entering a transitional pattern.
SOUTHEASTERN NEW ENGLAND FORECAST…
TODAY: Sunshine rules but some high clouds appearing in the western sky by later in the day. Highs upper 10s to middle 20s, coldest hills in northwest suburbs, least cold Cape Cod. Wind NW 10-20 MPH with higher gusts this morning diminishing to nearly calm this afternoon.
TONIGHT: Increasing clouds. Temperatures rising toward 30. Wind light SW early, SW 5-15 MPH later.
SUNDAY: A hint of sunshine parts of eastern MA around sunrise otherwise cloudy. Rain developing midday and afternoon mainly central MA and southwestern NH with scattered rain showers to the east. Highs 40-45. Wind S 10-20 MPH.
SUNDAY NIGHT: Overcast with rain, possibly heavy, pushing west to east across the region through late evening, then rapidly ending southwest to northeast overnight. Breaking clouds following. Lows around 35. Wind S 10-20 MPH with higher gusts, shifting to SW overnight.
MONDAY – MLK JR DAY: Sun and passing clouds. Highs 35-40. Wind W 15-25 MPH, higher gusts.
TUESDAY: Mostly sunny and windy. Low 18. High 33.
WEDNESDAY: Variably cloudy. Chance of light snow or snow showers. Low 21. High 31.
THURSDAY: Mostly cloudy. Chance of snow or rain near South Coast. Low 22. High 35.
FRIDAY: Partly sunny and windy. Low 23. High 33.