This update focuses on the weekend event, which is pretty much looking the same to me as it has all along. After a very cold overnight, clouds roll in by early Saturday and snow approaches and overspreads the region by mid to late afternoon and continues into the evening. All the while it will be trying to warm up from the south, but the wedge of cold air will hold strong near the ground while it warms a little more easily aloft. This means that the snow will transition to sleet and rain across the South Coast of RI and into southeastern MA, with freezing rain actually more likely in all but immediate coastal areas. Where it stays all snow, a moderate accumulation is expected. Lesser accumulation is expected in the mix/change area, with least toward the South Coast where the snow will last less time and the chance of plain rain is highest. The mix/change will be mainly a Saturday night and Sunday morning occurrence before the entire system exits from west to east later Sunday, opening the door for another blast of Arctic air with dry weather for Monday and Tuesday. Also continuing to monitor the possibility of a storm nearby on Wednesday, and this is still possible, though current indications point more to a northern stream system passing through with snow showers and not really phasing up with southern stream energy off the coast. Jury is still out on what may take place here. By late in the week, it’s dry and cold again.
SOUTHEASTERN NEW ENGLAND FORECAST…
TONIGHT: Mostly clear. Lows -10 to +10 from south central NH to Cape Cod, colder in some valleys. Wind NW to N 5-15 MPH.
SATURDAY: Increasing clouds. Snow developing west to east afternoon. Highs in the 20s. Wind N to NE 5-15 MPH shifting to SE.
SATURDAY NIGHT: Cloudy with snow of 3-6 inches northwest of a line from northern Plymouth County MA to Providence RI, and 1-3 inches elsewhere except less than 1 inch Cape Cod and Islands, changing to sleet and freezing rain South Coast eventually into more of RI and southeastern MA, northwestward into the Boston area by dawn. Temperatures steady in the 20s but rising to the lower 30s South Coast. Wind SE 5-15 MPH.
SUNDAY: Cloudy through midday with snow/sleet well northwest of Boston, snow to sleet and freezing rain Boston to Providence, plain rain immediate South Coast. Precipitation ending west to east early afternoon with breaking clouds. Highs from near 30 northwest of Boston to 40-45 immediate South Coast. Wind SE under 10 MPH except SW to W 5-15 MPH near the South Coast, then shifting to NW all areas and increasing to 15-25 MPH during the afternoon.
MONDAY: Partly sunny. Low 5. High 25.
TUESDAY: Mostly sunny. Low 5. High 25.
WEDNESDAY: Mostly cloudy. Chance of snow showers. Low 15. High 30.
THURSDAY: Partly cloudy. Low 15. High 25.
FRIDAY: Mostly sunny. Low 5. High 20.