DAYS 1-5 (JANUARY 26-30)
Three low pressure systems will impact our area during this 5-day period. Low pressure area #1 heads from the Ohio Valley to the eastern Great Lakes through tonight and meets its demise as a surface system over New York by tomorrow, while low #2 is a redevelopment of #1 a few hundred miles south of New England as an elongated system which will help turn our wind to northeast and east, off the Atlantic. It is the synoptic snow, generated at mid levels, that will move into our area from west to east by this evening, when most of the accumulation we are to expect will take place. Low #2 takes over offshore, absorbing the energy of #1 and keeping a northeasterly flow going during Wednesday, and while the synoptic-driven snow fades away due to drier air aloft, we’ll see some ocean-effect snow showers generated. I’m not expecting much snow accumulation during the day Wednesday from these due to their spotty nature and marginal surface temperatures. Low #3, meanwhile, will emerge off the Mid Atlantic and chase #2 away, becoming quite a powerhouse as it passes well to the south, keeping its own precipitation shield offshore, but helping to keep the northeasterly to northerly air flow going through Thursday, with additional ocean-effect snow showers. One more surge of minor accumulation should take place Wednesday night. Low #3 will become quite the large circulation offshore to the east of New England through Friday and the northerly air flow behind it will keep a snow shower threat going over Cape Cod, and one lobe of snow showers may make it as far back as the rest of coastal eastern MA sometime that day as well with a little trough extending out from the offshore storm. This will also pull the coldest air of the season so far out of Canada and into New England with some areas failing to reach 20 that day. Only a modest recovery is expected Saturday although it will be easier to take as the wind diminishes while high pressure moves into the region with sunshine.
TODAY: Increasing clouds. Highs 28-35. Wind N up to 10 MPH.
TONIGHT: Cloudy. Snow of a coating to 2 inches except up to 3 inches possible in higher elevations of north central MA and southwestern NH. Lows 22-29. Wind N-NE 5-15 MPH.
WEDNESDAY: Cloudy early to mid morning with snow tapering off. Mostly cloudy with a chance of snow showers thereafter but little additional accumulation. Highs 30-37. Wind NE 5-15 MPH.
WEDNESDAY NIGHT: Mostly cloudy with snow showers likely, accumulating an additional coating to 1 inch. Lows 23-30. Wind NE 5-15 MPH.
THURSDAY: Mostly cloudy with snow showers likely in the morning. Partly sunny with scattered snow showers favoring Cape Cod during the afternoon. Highs 30-37 by midday but temperatures falling sharply later. Wind NE to N increasing to 15-25 MPH.
THURSDAY NIGHT: Partly cloudy with snow showers Cape Cod. Clear elsewhere. Lows 8-15. Wind N 15-25 MPH, higher gusts especially eastern coastal areas. Wind chill below zero at times.
FRIDAY: Mostly sunny to partly cloudy with most clouds eastern MA coastal areas especially Cape Cod. Additional snow showers possible mainly Cape Cod but brief snow showers possible NH Seacoast to eastern coastal MA too. Highs 16-23. Wind N 15-25 MPH, higher gusts. Wind chill near zero at times.
FRIDAY NIGHT: Clear. Lows 6-13. Wind NW 5-15 MPH.
SATURDAY: Sunny. Highs 20-27. Wind NW 5-15 MPH.
DAYS 6-10 (JANUARY 31 – FEBRUARY 4)
Dry and cold as high pressure hangs on through January 31. Favoring a slower timing for the threat of the next system, focusing on February 1 to early February 2 for this, but too early to determine what specific impacts a low pressure system moving into the region from the southwest will have. Fair, seasonably cold weather should follow this.
DAYS 11-15 (FEBRUARY 5-9)
Best window of opportunity for additional unsettled weather is February 6-7 but low to moderate confidence. Can’t say much more about anything this far out as the status of the large scale pattern (blocking, etc.) is still somewhat uncertain.