Forecast discussion: As we head into November, we will be awaiting two low pressure systems to bring precipitation and strong winds to Boston. Also, the Cape and Islands may see some coastal flooding and power outages, as the winds will be stronger in this part of eastern Massachusetts.
Right now, a low pressure system off the coast of North Carolina is beginning to intensify. Meanwhile, a low pressure system over western Pennsylvania will help bring a round of showers well after the trick-or-treaters begin to dream about the bag of candy they wish to devour. A few isolated showers will begin by sunrise, and the winds will become a little stronger.
As we head into Saturday afternoon, the two low pressure systems will combine their strengths, bringing us light to moderate rain, along with wind gusts that could be as high as 35 mph. The National Weather Service has issued a High Wind Watch for eastern Massachusetts from 5 p.m. Saturday until 7 a.m. Sunday. Also, please remember to set your clocks back early Sunday morning one hour.
Rain will taper off to showers before moving to our east early Sunday morning, but the strong winds will continue. Due to the north winds, this might help create beach erosion and flooding on some streets close to north facing beaches. Therefore, the National Weather Service has issued a Coastal Flood Watch from 6 p.m. Saturday until 9 a.m. Sunday. The winds will remain strong into Sunday afternoon, and this will cause wind chills to make the air feel like it is in the middle to upper 30’s. Skies will begin to clear Sunday night, but temperatures will still fall to near or at freezing, despite the breezy conditions.
High pressure will begin to push the low further out to Nova Scotia on Monday, and the pressure gradient will begin to weaken. This will allow winds to diminish, and the air will feel a little warmer with the sunshine. Warmer air returns on Tuesday, and temperatures will rebound back to seasonable conditions. The next chance for precipitation will be Thursday, as a weak warm front brings some showers in the late morning. One other model sees us receiving precipitation Wednesday evening. But, for now, I like the consistency in the American model the last few days. The showers would end by late Friday morning, allowing for a little sunshine before sunset.
72 hour forecast:
Tonight: Cloudy with possible showers by 4 a.m. Winds will be slowly increasing by sunrise. We will see a low of 44.
Saturday: Isolated showers by mid-morning, with scattered showers by the late morning. Precipitation increases to rain by about 4 p.m. We will see a high of 48 with north winds of 22-27 mph with gusts of 40-45 mph.
Saturday night: Windy with rain tapering to showers. All precipitation ends by 4 a.m. We will see a low of 40 with north-northwest winds of 23-28 mph gusting as high as 40-45 mph.
Sunday: Mostly cloudy skies and windy conditions the rest of the day. We will have a high of 46.
Sunday night: Clearing skies, breezy, and cold with the low near 33.
Monday: Mostly sunny with diminishing winds and a high of 48.
Monday night: Partly cloudy with a low of 35.
Election Day: Mostly sunny and seasonable. Highs 54-57, lows 45-48.
Wednesday: A sunny start, with increasing clouds by mid-afternoon. Highs 59-62, lows 47-50.
Thursday: Overcast with showers arriving by the late morning. Highs 57-60, lows 42-45.
Friday: Showers end by the late morning, with partial sunshine in the afternoon. Highs 50-53, lows 37-40.