DAYS 1-5 (NOVEMBER 14-18)
Discussion…
Today will be a day of cold air advection. What does that mean for today in particular? It means that we’ll be delivered a modified cold air mass from Canada, although with temperatures already having dropped due to an overcast/wet/cool day yesterday and some clearing last night, what will really happen today when you factor the incoming cool air with the diurnal warming of sunlight, the temperature really just won’t go up that much. It will feel even cooler than it is because of a developing gusty breeze, as well as some passing patches of cloudiness, the result of a leftover layer of moisture a few thousand feet off the ground and incoming colder air above that. There may be enough initial instability for a few sprinkles of rain, with this most likely occurring north of I-90. These clouds will dissipate this evening and the wind will drop off as high pressure moves across the region. This is a recipe for radiational cooling, when any warmth of the sunlight radiates quickly out toward space and the temperature drops off. It may drop significantly enough to match the dew point in some interior lower elevations, which would result in patches of fog forming. Sunday, the high pressure area will move offshore and we’ll have a warm front pass by in the morning and midday hours, which will introduce a warmer southerly air flow for the balance of the day, setting the stage for a round of showers (maybe even a rumble of thunder) as a pretty potent cold front approaches from the west by evening, parented by low pressure tracking eastward and passing north of our area Sunday night. Besides the risk for brief heavy rain showers, we’ll have to watch for some strong wind gusts, as the air not that far above us will be blowing strongly, and any heavier showers can drag some of this wind down to the surface in gusts. Thankfully with a lot of the trees now having lost most of their leaves, this should lessen the chance of damage and therefore reduce the power outage chances. However, there still can be some isolated damage & resulting outages as this front and its band of showers crosses from west to east. Monday will be another cold advection day with plenty of wind and a sky of sun and passing clouds. A disturbance will move this way via the Great Lakes on Tuesday and bring plenty of clouds along with a chance of a few rain and/or snow showers as it will be chilly at the surface and cold aloft. This system is gone by Wednesday and high pressure in the Great Lakes will deliver a solid cold air mass from Canada. There may be a few isolated but insignificant snow flurries around on Wednesday.
Details…
TODAY: Sun/cloud mix. Brief very light rain showers possible mostly from Boston north and west during midday. Highs 47-54. Wind NW 5-15 MPH, gusts 20-25 MPH.
TONIGHT: Clearing. Patchy ground fog low elevations. Lows 30-37. Wind NW 5-15 MPH early, then diminishing to near calm.
SUNDAY: Increasing clouds. Highs 53-60. Wind S 5-15 MPH, higher gusts in the afternoon.
SUNDAY NIGHT: Cloudy with an episode of rain showers, possibly heavy, including a slight chance of thunder, during the evening. Clearing overnight. Lows 40-47. Wind S shifting to W 10-20 MPH with higher gusts, with a few gusts 30-50 MPH possible during the passage of the showers.
MONDAY: Sun and passing clouds. Highs 47-54 occurring in the morning then falling through the 40s. Wind W 10-20 MPH, gusts 25-35 MPH.
MONDAY NIGHT: Variably cloudy. Lows 30-37. Wind NW 5-15 MPH.
TUESDAY: Mostly cloudy. Chance of rain/snow showers. Highs 38-45. Wind W 10-20 MPH.
TUESDAY NIGHT: Mostly cloudy with a chance of snow showers early, then clearing. Lows 23-30. Wind N 10-20 MPH.
WEDNESDAY: Partly sunny. Slight chance of a passing snow flurry. Highs 35-42. Wind N 10-20 MPH.
DAYS 6-10 (NOVEMBER 19-23)
High pressure slips off to the south of New England and milder weather results for the early part of this period, before a frontal boundary slips to the south again with some briefly unsettled weather, followed by seasonably cool and drier weather.
DAYS 11-15 (NOVEMBER 24-28)
Thanksgiving Week Outlook: Trend continues to be for our area to be in a battle zone between a warm US Southeast and cold Canada. This creates the opportunity for some unsettled weather and temperature variation. There are some shifts in guidance resulting in model divergence but not going to read into that too much at this time, hence keeping the outlook unchanged.