Before you non-meteorologists ask what a “transitional phase” is, I’ll answer what I mean. All this means is that the current weather pattern (brief cool shots followed by dominant mild weather) is breaking down, but will not settle into a brand new stable pattern just yet. It will be a battle between the departing pattern and what I believe to be the upcoming one. Evidence presents itself to me in this form: Several runs of a normally stable computer model that have not looked too much like each other, but a few starting to come into some agreement. But forget the technical for now…all this means is more changeable weather from here through Thanksgiving, and probably beyond.
This evening: Rain/sleet/snow
Tonight/Friday: Shot of chilly air tonight through Friday.
Weekend: Another warm-up.
Next week: Dry & chilly start, watching a storm for midweek.
Thanksgiving peek: Will lean toward improvement as progressive storm departs.
A wave of low pressure moving along a frontal boundary, of which we are on the cold side, during this evening, producing light rain which will switch to sleet & snow when it comes down a little harder and colder air works in. Don’t expect much accumulation, only minor amounts on unpaved surfaces, with most of it occurring in hilly areas west and southwest of Boston (areas to the northwest may not see heavy enough precipitation to get much).
As low pressure departs Friday, expect a bright but breezy & chilly day and a cold night. This weekend, high pressure will slide off the East Coast and a southwest wind flow means milder to warmer temperatures. Expect temperatures to crack 50 Saturday and 60 Sunday.
Another front will quietly cross the region Sunday night with little or no precipitation, followed by high pressure which will bring dry and cool weather early next week.
By the middle of next week, we’ll be needing to watch a low pressure area to the southwest. It’s too early to determine where it will track exactly, and what impact it will have on the region. But way out in advance my early feeling is that Wednesday (a big travel day) will be an unsettled day, and Thursday (Thanksgiving) will see improvement. Stay tuned…
Boston Area Forecast…
THIS EVENING (THROUGH MIDNIGHT): Overcast with rain, mixing with sleet & snow, then turning to snow in some areas before tapering off. Accumulations of up to 1/2 inch are possible on unpaved surfaces especially in hilly areas west and southwest of Boston. Temperature falling into the 30s. Wind NW 5-15 MPH.
OVERNIGHT (AFTER MIDNIGHT): Clearing. Low 27-32. Wind W 5-15 MPH.
FRIDAY: Mostly sunny. High 46-51. Wind W 5-15 MPH.
FRIDAY NIGHT: Partly cloudy. Low 27-32. Wind WSW 5-10 MPH.
SATURDAY: Mostly sunny. High 51-56. Wind SW 10-15 MPH.
SATURDAY NIGHT: Variably cloudy. Low 40-45. Wind SW 5-15 MPH.
SUNDAY: Partly sunny. High 60-65. Wind SW 10-20 MPH.
MONDAY: Mostly sunny. Low 40. High 50.
TUESDAY: Mostly sunny. Low 30. High 50.
WEDNESDAY: Mostly cloudy. Chance of rain/mix. Low 32. High 44.
THURSDAY – THANKSGIVING: AM rain/snow showers. PM clearing. Low 32. High 44.