Low pressure has redeveloped in the Mid Atlantic and will move northeastward across southeastern New England through Thursday. This will continue to throw a complex package of precipitation into southern New England with snow inland and rain at the coast, a wavering rain/snow line with some sleet, which will eventually push further northwestward during the early hours of Thursday. Precipitation will taper off during the day Thursday as the low pressure area moves just northeast of the region.
Here are the major factors with the storm…
Wind: From the east 25-35 MPH gusting 40-60 MPH along the coast especially south of Boston during the morning hours of Thursday. Minor wind damage possible.
Coastal flooding: Astronomical tides are not too high, but some minor flooding and splash over is possible during the mid to late morning Thursday.
Snowfall: Amounts are expected to range from nothing across southeastern MA and Cape Cod to slushy coatings to 1 inch or so from Boston north and west into the immediate suburbs, building up to a few inches in the 495 belt north of the Mass Pike, building further to 6-10 inches in higher elevations of north central MA into southern NH.
Behind the system as colder air starts to filter in, some snow showers may dust the ground in areas that did not see much during the storm.
Looking ahead… A chilly/drier day Friday behind the storm. Another low pressure area moves off the Mid Atlantic Coast Saturday and it will be cold enough to snow in all areas here, but the track of the storm may be too far south and east of New England to produce much in the way of significant snow. Another chilly day Sunday as dry weather returns.
Peaking at the end of 2012 and the start of 2013: Arctic cold front will bring the coldest air of the early winter so far, probably around Tuesday which is the 1st day of January. This will be the beginning of a chilly/dry pattern which is expected to dominate the first month of the New Year.
Forecast for eastern MA, southern NH, RI…
OVERNIGHT: Rain Cape Cod, SE MA, coastal MA, mix just inland eastern MA, RI, NH Sea Coast, snow further inland (see accumulations above). Rain/snow line pushing further northwest toward dawn. Lows from near 30 far NW of Boston to near 40 Cape Cod area. Wind E increasing to 20-30 MPH with gusts 40-60 MPH coastal areas especially south of Boston, NE-N 10-20 MPH elsewhere.
THURSDAY: Overcast. Lighter precipitation mainly rain/drizzle except mix far northwest, tapering and becoming intermittent in the afternoon. Highs from 35 far NW to 45-50 Cape Cod. Wind variable from SE to S then W 10-20 MPH over SE MA and RI, variable to N and eventually NW at similar speeds elsewhere.
THURSDAY NIGHT: Variably cloudy with scattered rain/snow showers becoming all snow showers with a few scattered dustings. Lows 25-30. Wind NW 10-15 MPH gusting over 20 MPH.
FRIDAY: Mostly sunny. Highs 32-37. Wind NW 10-20 MPH.
SATURDAY: Mostly cloudy. PM snow or snow showers. Low 18. High 30.
SUNDAY: Partly sunny and windy. Low 18. High 30.
MONDAY – NEW YEAR’S EVE: Partly cloudy. Snow showers late. Low 21. High 34.
TUESDAY – NEW YEAR’S DAY: Mostly sunny. Low 8. High 18.
WEDNESDAY: Mostly sunny. Low 5. High 24.