DAYS 1-5 (JANUARY 25-29)
A quiet & cold start to the week today as high pressure slides eastward into the region, centered to the north, and low pressure in the Canadian Maritime Provinces drifts further away, allowing winds to slacken. A more active period of weather will then be with us for the rest of this period, starting as low pressure makes a run at New England via the Midwest Tuesday. The blocking pattern in place will force a redevelopment of this system in the form of a fairly weak, elongated low pressure area well south of New England later Tuesday into Wednesday, which will then head out to sea, but while this is happening, the energy left from the original dissipating surface low will come across the region at the same time the wind turns northeasterly here. All of this will combine for periods of snow Tuesday night and Wednesday, which will lead to some minor accumulations. Some of this snowfall Tuesday night to early Wednesday, which may be mixed with rain initially over Cape Cod and the South Coast region, will be from the old storm’s energy, while some of it will be ocean-effect. It won’t be a big storm, but since snow has been relatively absent recently, it’ll be important to keep in mind that even small amounts of snow falling on travel ways that are not treated can lead to slippery conditions. As we get to Thursday, a second low pressure area will be passing south of New England, and this one will blow up into a powerful ocean storm, not making a direct hit at all, but serving to keep the northeasterly air flow going with some additional ocean-effect snow showers, especially in eastern and southeastern portions of the region. What this storm will do as it turns northeastward toward the Maritimes of Canada is pull down another piece of Arctic air and we will turn quite cold for the end of the week, with a few additional ocean-effect snow showers due to a northerly air flow over Cape Cod during Friday, which will easily be the coldest day of the next 5.
TODAY: Sunshine & a few high clouds. Highs 29-36. Wind NW 5-15 MPH, gusts 20-25 MPH possible.
TONIGHT: Lots of high clouds. Lows 18-25. Wind N 5-15 MPH.
TUESDAY: Thickening high to mid level clouds. Highs 28-35. Wind N up to 10 MPH.
TUESDAY NIGHT: Cloudy. Periods of snow, except possibly mixed with rain South Coast. Snow accumulation of a coating to around 1 inch possible. Lows 25-32. Wind NE 5-15 MPH.
WEDNESDAY: Mostly cloudy. Periods of snow except possible rain/snow mix South Coast morning with additional snow accumulation of a coating to around 1 inch possible. Snow showers possible in the afternoon. Highs 30-37. Wind NE 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy. Snow showers possible, favoring southeastern NH, eastern MA, and RI. Lows 23-30. Wind NE 5-15 MPH.
THURSDAY: Mostly cloudy to partly sunny. Additional snow showers possible favoring Cape Cod. Highs 25-32. Wind NE to N 15-25 MPH.
THURSDAY NIGHT: Partly cloudy. Snow showers possible mainly Cape Cod. Lows 10-17. Wind N 15-25 MPH, higher gusts possible on Cape Cod.
FRIDAY: Sunny except clouds and snow showers possible Outer Cape Cod. Highs 18-25. Wind N to NW 15-25 MPH, higher gusts possible especially eastern coastal areas.
DAYS 6-10 (JANUARY 30 – FEBRUARY 3)
The blocking pattern is likely to still be in place but may be weakening. Fair and cold but more tranquil weather as high pressure moves in January 30. Watching later January 31 to early February 2 period for the next potential impact from low pressure. Fair, chilly ending to this period.
DAYS 11-15 (FEBRUARY 4-8)
Expecting a continued slow weakening of the blocking pattern and we will have to watch for additional opportunities for unsettled weather as a result of a storm track that allows low pressure systems more direct access to the Northeast.