DAYS 1-5 (NOVEMBER 29-DECEMBER 3)
Two low pressure waves will bring periods of rain today and Wednesday, with the main surges in the afternoons and evenings of both days. We may start off today with brief freezing rain in some of the valley areas of north central MA and southern NH as an initial batch of light rain moves through there while the air is still below freezing near the ground, so watch for brief icing in a few locations until late morning. The remainder of the rain from these systems will occur with temperatures above the icing threshold. As the final low pulls away and intensifies in eastern Canada, a gusty westerly wind will overtake the region Thursday and Friday, though it will take a while for the colder air to arrive, so Thursday will be quite mild, and Friday only somewhat cooler. High pressure will move closer and drive a little colder air down from Canada between it and the old low pressure area Saturday, which should be a very nice but chilly early December day.
TODAY: Overcast. A period of light rain north central MA into southern NH this morning may freeze on a few surfaces until about 10AM. More widespread rain developing regionwide this afternoon with pockets of heavier rain possible. Highs 42-49 Boston west and north, 50-58 to the southeast. Wind S to SW 5-15 MPH with higher gusts, especially late in the day.
TONIGHT: Cloudy. Rain tapers off. Patchy fog. Lows 40-48. Wind SW 5-15 MPH and gusty early, then becoming light variable.
WEDNESDAY: Cloudy. Rain mainly in the afternoon. Highs 45-52, Wind variable to E 5-15 MPH.
THURSDAY: Partly cloudy and windy. Lows 38-45. Highs 45-52 northwest, 52-60 southeast.
FRIDAY: Partly cloudy and windy. Lows 30-38. Highs 44-52.
SATURDAY: Mostly sunny. Lows 25-33. Highs 38-45.
DAYS 6-10 (DECEMBER 4-8)
Weak disturbance may bring a few mix/snow showers late December 4 to early December 5 and a brief surge of colder air behind it. Watching for a possible storm system around the middle of the period but timing uncertain, though odds would favor rain over snow as temperatures moderate.
DAYS 11-15 (DECEMBER 9-13)
Active Pacific jet stream will send another system toward the region by late in the period after a fair start. Temperatures near to above above normal.