Forecast discussion: A low pressure system just passing off eastern Long Island brought a little snowfall on Tuesday to eastern Massachusetts. We began to see some flurries during the late morning. We then saw light snow, with occasional bursts of moderate snow. However, around the region, about a coating to an inch fell. As the low passes into the Gulf of Maine, we will see occasional moderate bursts of snow. The heavier amounts will stay in the Boston area, along with northern Plymouth and Bristol Counties. For this reason, the National Weather Service has issued a Winter Storm Warning for this area until 1 a.m. A Winter Weather Advisory in effect for the rest of the region, including the Cape, until 10 p.m.
High pressure moving into northern Arkansas will push low towards the northeast. We will see mostly sunny skies for Sunday, with temperatures actually going above freezing for the first time in several days. As we move into Wednesday night, winds will begin to turn to the southwest. This will allow for warmer air to move into Southern New England. We will actually push 40 degrees on Thursday.
By Thursday evening, a low pressure system now over eastern British Colombia will move into the Central U.S. It will begin to pick up some upper level dynamics, and move over New England Friday night. We will see scattered showers by early Friday evening, with the precipitation ending during the overnight hours. We will see a brief period of dry weather until a second low begins to race toward the Northeast. More showers will arrive by late Saturday afternoon. Showers and periods of rain will occur on Sunday, and temperatures will actually reach the lower 50’s. So, any snow and ice on the sidewalks and ground should melt and be washed away.
All the rainfall will end by Monday morning, as high pressure from central Canada moves quickly towards New England. However, colder air will be behind the cold front that will pass through the area. We should see temperatures in the middle 40’s before falling through the day. By Christmas Eve, it will feel like Christmas, but it will not look like Christmas. Right now, we would go into Christmas Day without a White Christmas.
72 hour forecast:
Tonight: Snow showers/flurries ending around 1 a.m. I’m expecting Boston to see 3-6 inches, while east of the city we will see 2-4 inches. We will see a low of 22.
Wednesday: Mostly sunny with a high of 33. Winds will come from the west-northwest at 12-15 mph.
Wednesday night: Partly cloudy with a low of 25. Winds will come from the west-northwest at 10-13 mph.
Thursday: Mostly sunny with a high of 40.
Thursday night: Partly cloudy with some increasing clouds by dawn and a low of 33.
Friday: Overcast and milder with rain showers by the early evening with a high of 47.
Friday night: Scattered showers ending around 3 a.m., but remaining mostly cloudy. We will see a low of 38.
Saturday: Cloudy skies with showers returning by the late afternoon. Highs 46-49, lows 38-41.
Sunday: Rain/showers. Highs 50-53, lows 39-42.
Monday: Showers/drizzle ending in the morning, with partly sunny skies by the afternoon. Highs expected to reach 45-48 before falling in the afternoon, lows 22-25.
Christmas Eve: Mostly sunny and colder. Highs 33-36, lows 21-24.