7:18AM
This is basically a re-issue of the previous discussion edited for time period and with a few tweaks to the forecast portion.
High pressure will be in control today, cold air still in place, but with less wind than we had on Sunday, resulting in a quieter/cold/bright day, but you’ll notice high clouds starting to show in the southwest sky later in the day before the sun sinks to its early bedtime. This is the first hint of a storm system brewing for the middle of the week. This storm is being born of what will eventually be a combination of energy in the northern jet stream (which has been dominating our weather with cold shots between milder spells so far this month, and a whole lot of dry weather) and the southern jet stream, which has been largely inactive, but is sending a low pressure area eastward out of the US Southwest, picking up Gulf of Mexico moisture, then turning up the East Coast. Though I initially thought the bulk of this system would pass southeast of New England, it is apparent now there should be enough of a link-up to pull the first low pressure area closer, probably passing just west of southeastern New England during the day Wednesday with possibly a second center passing overhead in the evening. But before this happens, some moisture will stream ahead of it, partly as a result of the link between the 2 streams beginning to take place, so the sun of Monday will be a memory by Tuesday, which will end up a cloudy day with even some spotty rain trying to break out before days’ end. When the storm comes up, it will be dragging mild air with it, resulting in a mainly rain event for the forecast area of southern NH, eastern MA, and RI, but cold air being drawn into the back side of the quickly departing lows Wednesday night may cause some snow to mix in as precipitation tapers off. Though this storm may be loaded with moisture, our total amounts may not be as beneficial as they may have been due to the quick-moving nature of the storm, and the possibility that the heaviest rain band will take place west of the region. We’ll be seeing another cold air mass move in for the holiday on Thursday, which should be a windy and chilly day with dry weather. A very weak disturbance may pass north of the region on Friday (the big shopping day otherwise known as Black Friday), but we should remain dry and chilly here. Looking ahead into the weekend, it also looks mainly dry and chilly at this time as a new area of high pressure builds to the north and refreshes the supply of late Autumn chill and keeps us in our overall drier than normal pattern.
Updated forecast for southeastern New England…
TODAY: Mostly sunny. Highs 30-35. Wind 5-15 MPH, still gusting 20-25 MPH through midday before diminishing.
TONIGHT: Increasing clouds. Low 25-30. Wind SW up to 10 MPH.
TUESDAY: Cloudy. Spotty light rain possible in the afternoon. Highs 40-45. Wind S 5-15 MPH.
WEDNESDAY: Periods of rain, may end as mix or brief snow at night. Windy. Warming into 50s to possibly over 60 through midday early afternoon before falling back to the 30s evening.
THURSDAY – THANKSGIVING: Mostly sunny and windy. Lows in the 20s. Highs in the 30s.
FRIDAY: Partly cloudy. Lows around 20. Highs around 40.
SATURDAY & SUNDAY: Partly cloudy. Lows 15-25. Highs 35-45.