Forecast discussion: A strong Nor’easter is centered over the Delmarva Peninsula at the moment, and his given eastern Massachusetts strong wind gusts, especially offshore. Right now, precipitation seems to be stationary, as it tries to make its way into New York City. We will see a little more precipitation this evening, before a change over for tomorrow night. At this time, eastern Massachusetts is under a Winter Weather Advisory until 7 a.m. Friday morning. Also, a Coastal Flood Warning is in effect for the entire eastern shoreline, including the Cape and Islands. Meanwhile, due to the strong winds we are expecting, a Wind Advisory is in effect for eastern Massachusetts. The eastern shoreline, Cape, and Islands will see a High Wind Warning in effect.
As we go into tomorrow, I feel areas west of Interstate 495 will remain as wet snow For Boston, we will see a mix of wet snow and rain by the early morning, before turning to all snow tomorrow evening. As we move towards Plymouth, this region will see a mix of wet snow, sleet, and rain, with little accumulation. The eastern shore will remain all rain. However, there is the chance of seeing some coastal flooding, due to the strong easterly winds and wind gusts which will move onshore. Also, there will be two astronomical high tides within a 14 hour period.
So, what do I expect for final snowfall totals? After looking over the latest computer models, I am going to stay near with what I said in last night’s forecast. I will call for 6-10 inches for the area west of Boston, namely Worcester County. From Boston east to Plymouth, I am looking for a total of 3-5 inches. Finally, from Plymouth east, I see just a coating to a half inch possible. Also, I feel we will see the most accumulation Thursday into Thursday evening, as some colder air helps change the precipitation to wet snow.
By Friday afternoon, we will see some leftover snow showers, before the low finally takes the precipitation shield out to sea. We will see a quiet weekend, with partly to mostly sunny skies and temperatures in the lower 40’s. As we head into next week, an upper level ridge will move over the eastern U.S. This ridge will help bring some warmer air into Southern New England, helping to bring high temperatures up into the upper 40’s by Monday.
The next chance for some precipitation will be Tuesday. A cold front will slide through the Northeast U.S., and will bring all rain this time. We will see some heavy rain at times into early Wednesday morning, before the precipitation begins to taper off.
72 hour forecast:
Tonight: Showers before 2 a.m., before changing over to wet snow in Boston. From Boston to Plymouth, a mix of wet snow and rain. Finally, all rain along the immediate coastline. It will be windy with gusts of 40-45 mph, especially along the coastline. I’m expecting a low near 33.
Thursday: Light to moderate snow west and in Boston, with a mix of wet snow and rain slowly changing over to all snow from Boston to Plymouth. From Plymouth east, rain will mix with some wet snow at times. We will see a high of 37, with winds north-northeast 25-30 mph, with gusts up to 45-50 mph at times. The shore will see gusts as high as 55-60 mph.
Thursday night: From Boston to Plymouth, precipitation changes over to wet snow, with a low of 31. At the coastline, it will continue to see a mix of snow and rain. Winds will remain around 20-25 mph with gusts of 40 mph in the city, with gusts reaching 50-55 mph along the shoreline.
Friday: Light snow tapering to a mix of rain and snow showers by the afternoon with diminishing winds. We will see a high of 40.
Friday night: Precipitation ends by the end of the evening commute. Partly to mostly cloudy skies expected after midnight with a low of 29.
Saturday: Partly to mostly sunny with a high of 44.
Saturday night: Partly cloudy with a low of 29.
Sunday: Mostly sunny. Highs 44-47, lows 32-35.
Monday: Mostly sunny during the day, with increasing clouds by the late afternoon. Highs 47-50, lows 35-38.
Tuesday: Showers developing after midnight, with heavier rain developing during the evening. Highs 48-51, lows 32-35.
Wednesday: Heavy rain around midnight, tapering a few hours later, before ending before dawn. Partly sunny skies expected for the rest of the day. Highs 42-45, lows 30-33.