DAYS 1-5 (DECEMBER 5-9)<\/p>\n\n\n\n
The event is underway. Rapidly deepening and progressive low pressure will track northeastward, its center passing just southeast of or over Nantucket later today and into the Gulf of Maine tonight. While a mild air mass in place has resulted in this system starting as rain for all of the WHW forecast area, the process of rapid deepening and resultant banding of heavier precipitation, and generation of cold air aloft, will create a widespread dynamic cooling process, which is already underway and as of the time of this writing, the transition to snow has already taken place in southwestern NH and parts of central MA, and this will expand east and southeast with time, reaching Cape Cod and the Islands lastly where it may never completely change over to snow, before the precipitation shield, pivots and exits from southwest to northeast. The resultant bands of heavy snow, as much as 1 to 2 inch per hour snowfall rates, will lead to significant accumulations, especially where it snows longest. Look for the amount break-down below. We can’t discount the possibility of thunder occurring in the stronger bands of precipitation – something that is not unusual for such a feature. The low pressure center will cross the Bay of Fundy early Sunday then exit via the Maritime Provinces of Canada, leaving us blustery and chilly but dry weather in its wake. A quick look into early next week indicates we still need to watch low pressure offshore later Monday into Tuesday, but it still looks like it will be far enough offshore to avoid any significant impact. Will re-evaluate this for the next update.<\/p>\n\n\n\n
TODAY: Overcast with rain changing to snow from west to east across the region, heavy at times, especially under banding zones where thunder is also possible. Temperatures falling to 28-35, coldest in interior southern NH and central MA, by late-day. Wind NE to N increasing to 10-20 MPH except 20-30 MPH coastal areas with gusts above 25 MPH possible interior areas and above 40 MPH coastal areas.<\/p>\n\n\n\n
TONIGHT: Snow including heavy bands, except still some mix Cape Cod, slowly ending from southwest to northeast followed by breaking clouds. Total snowfall for the storm expected to be a slushy coating to 1 inch Cape Cod and Islands and immediate South Coast of MA & RI, 1-3 inches South Shore of MA (Plymouth) to southern RI just away from the shoreline, 3-6 inches Cape Ann MA and immediate MA coast through Boston to Providence RI mainly just east of I-95 down into southwestern RI, 6-10 inches NH Seacoast down I-95’s northern stretch to Boston’s Metro West to northwestern RI and eastern CT, as well as far southwestern NH, with 10-15 inches Worcester Hills through interior southern NH through the interior Merrimack Valley of MA. Lows 25-32. Wind N to NW 10-20 MPH with gusts 25-35 MPH.<\/p>\n\n\n\n
SUNDAY: Cloud\/sun mix. Passing light snow showers possible. Highs 33-40. Wind NW 15-25 MPH, higher gusts.<\/p>\n\n\n\n
SUNDAY NIGHT: Mostly clear. Lows 18-25. Wind NW diminishing to under 10 MPH.<\/p>\n\n\n\n
MONDAY: Partly to mostly cloudy. Highs 31-38. Wind variable up to 10 MPH.<\/p>\n\n\n\n
MONDAY NIGHT: Cloudy. Chance of snow\/mix\/rain favoring the South Coast. Temperatures steady in the 30s. Wind NE 5-15 MPH.<\/p>\n\n\n\n
TUESDAY: Cloudy start with a chance of snow\/mix\/rain favoring Cape Cod, then clearing. Highs 35-42. Wind N 10-20 MPH.<\/p>\n\n\n\n
TUESDAY NIGHT: Mostly clear. Lows 20-27. Wind N 5-15 MPH.<\/p>\n\n\n\n
WEDNESDAY: Mostly sunny. Highs 36-43. Wind variable up to 10 MPH.<\/p>\n\n\n\n
DAYS 6-10 (DECEMBER 10-14)<\/p>\n\n\n\n
Disturbance from the northwest brings a rain\/snow shower risk December 10 with a brief shot of milder air then a shot of colder air with dry weather December 11. A frontal boundary and possible low pressure system brings the threat of unsettled weather back for December 12-13, with drier weather returning at the end of the period.<\/p>\n\n\n\n
DAYS 11-15 (DECEMBER 15-19)<\/p>\n\n\n\n
Watching December 16-18 as a window for potential storm threat (rain\/mix\/snow – too early to know).<\/p>\n","protected":false},"excerpt":{"rendered":"
DAYS 1-5 (DECEMBER 5-9) The event is underway. Rapidly deepening and progressive low pressure will track northeastward, its center passing just southeast of or over Nantucket later today and into the Gulf of Maine tonight. While a mild air mass in place has resulted in this system starting as rain for all of the WHW … Continue reading Saturday December 5 2020 Forecast (9:37AM)<\/span>