Forecast discussion: Boston received a mixed bag of precipitation Monday morning. According to the observations from Logan Airport, we received snowfall starting after midnight until 7 a.m. From there, it changed over to showers and light rain, followed by drizzle, mist, and patchy fog.
We will see some patchy fog until about 11 p.m., when visibility will improve. However, this will not be the end of seeing precipitation. A low pressure system over southwest Georgia at the moment will bring another round of precipitation into Southern New England. This time, the precipitation will be all snow, and we will see it begin by the end of the morning commute on Tuesday. Light to moderate snow will continue into the beginning of the evening commute, before the moisture moves offshore. I feel the coastline will see the highest snowfall totals, but the capital city should see about 1-2 inches by the end of the daytime hours.
From there, a very strong high pressure system from the Rockies will bring drier conditions. However, it will also bring the coldest temperatures of the season. We will only reach the upper 20’s to near freezing up to Saturday. Overnight lows will range from the middle teens to lower 20’s.
As we head into the weekend, the computer models are suggesting another decent low pressure system forming over eastern Texas Saturday. The low, depending on its track, will bring another round of wintry precipitation to the region. There will be more than enough cold air to keep it as snow Saturday afternoon, but warmer air in the lower levels of the atmosphere could create some sleet and freezing rain on Sunday. Colder air behind the low’s center will change the precipitation back to snow showers by late Sunday evening. All precipitation ends by early Monday morning. At this time, the confidence in the forecast for this system is low, as the computer models disagree on the low’s forecast track at this time.
72 hour forecast:
Tonight: Mostly cloudy with some patchy fog until 11 p.m. We will see a low of 30.
Tuesday: Overcast skies during the morning with light to moderate snow during the mid-morning to early evening hours and a high of 33. Accumulations will be 1-2 inches, with the highest totals along the coastline. Winds will come from the west-northwest at 9-12 mph.
Tuesday night: Partly cloudy with a low of 22. Winds will come from the west-southwest at 13-16 mph.
Wednesday: Mostly sunny with a high of 32.
Wednesday night: Clear skies and cold with a low of 20.
Thursday: Mostly sunny with a high of 26.
Thursday night: Mostly sunny with a low of 16.
Friday: Partly to mostly sunny. Highs 29-32, lows 19-22.
Saturday: Overcast by mid-morning with light snow starting in the mid-afternoon. Highs 32-35, lows 32-35.
Sunday: A mix of sleet, snow, and freezing rain. Precipitation may change back to snow showers in the early evening. Highs 32-35, lows 17-20.
Monday: Snow showers end by the early morning, and becoming partly sunny by the afternoon. Highs 27-30, lows 18-21.