DAYS 1-5 (FEBRUARY 26 – MARCH 2)
For those awake last evening in a good portion of the region you may have been witness to a beautiful and somewhat rare style of snowfall in this area. Now rare and snowfall has been used together this winter several times because of the lack of snowfalls in a very mild, nearly snowless winter pattern, but this is a different kind of rare snowfall – perfect hexagonal snowflakes falling in calm air from a sky that includes some clearing enough at one point to see the moon, Venus, and Jupiter shining brightly before they set. So both rare and a bit unique. This was the end portion of a snowfall event that even slightly over-performed model and meteorologist expectations, dropping a good 1/2 to 2 inches of low water content fluff over much of the region. This was due to relatively warmer air riding up and over a cold dome of air in place and the recipe was just there for it all to happen that way. This morning, a low level inversion results in some very spotty freezing and/or frozen drizzle, then later today, we may see some additional flakes from a passing low pressure area, the center of which will scoot just north of the region this afternoon, allowing us to warm up a little over yesterday’s chill. This system won’t produce much other than a rain or snow shower to the south, with most of the snow shower activity concentrated to the north of I-90. A few of these showers of snow may put down a quick new coating, briefly slicking up some roads and walks. The system is outta here this evening and a small area of high pressure will then build in overnight into Monday with dry weather. We’ll see clouds advancing during Monday, thickening up later in the day, ahead of a well-advertised winter storm system approaching. This one is going to be a light to moderate snowfall for our region. Model guidance tends to under-estimate the scope of the cold air hanging on with these systems, so I expect this to be a mainly snow event for the WHW forecast area, beginning late Monday night and lasting well into Tuesday, with just some potential for rain to become involved right on the South Coast / Cape Cod before the main precipitation ends Tuesday afternoon. The system won’t have much wind with it for our area as we will be between a primary low that travels into the Great Lakes and a secondary low that forms and moves out south of New England, with not that expansive a circulation, kind of an elongated system, stretched west-to-east. Exit this system Tuesday night, and in builds a small area of high pressure to bring fair weather for the first day of March. But the active pattern will roll on and another low pressure system will impact our region Thursday. Early indications are that this one is destined to have milder air in place for its arrival and take a track a little further north, with a mix/rain event more in the cards versus a snowy one, but at day 5 I’m not ready to lock that idea in just yet, so we’ll see how it goes.
TODAY: Mostly cloudy. Spotty freezing/frozen drizzle this morning. Chance of snow showers north of I-90 and a possible mix/rain shower I-90 belt south in the afternoon. Highs 33-40. Wind calm early, then SW-S 5-15 MPH.
TONIGHT: Clearing. Lows 20-27. Wind NW 5-15 MPH.
MONDAY: Sunshine followed by increasing clouds. Highs 35-42. Wind variable up to 10 MPH.
MONDAY NIGHT: Overcast. Snow arrives late evening and overnight. Lows 22-29. Wind NE 5-15 MPH.
TUESDAY: Overcast. Snow likely, may mix with rain before ending South Coast. Snowfall accumulations 1-3 inches South Coast / Cape Cod, 3-5 inches MA South Shore, inland RI, MA North Shore, I-95 belt, 5-8 inches interior southern NH, central MA, and northeastern CT. Higher probability for the lower sides of the ranges to verify than the upper sides. Highs 30-37. Wind NE 5-15 MPH.
TUESDAY NIGHT: An early snow flurry possible otherwise clearing. Lows 20-27. Wind NW 5-15 MPH.
WEDNESDAY: Sun/cloud mix. Highs 37-44. Wind W 5-15 MPH.
WEDNESDAY NIGHT: Clouds increase. Lows 30-37. Wind variable up to 10 MPH.
THURSDAY: Mostly cloudy. Chance of rain/mix. Highs 40-47. Wind SE 5-15 MPH.
DAYS 6-10 (MARCH 3-7)
Active pattern – watching low pressure areas to bring potential wintry precipitation threats March 4 and 6-7. Temperatures near to below normal.
DAYS 11-15 (MARCH 8-12)
General idea is for continued colder than normal but a drier, less active pattern in terms of storm threats.