Forecast discussion: Boston once again experienced teeth-chattering cold temperatures early Tuesday morning. Logan Airport had the mercury fall to 2 degrees, but it did not break a daily record. Providence, RI did tie at -3 and Hartford, CT broke their record at -8. As we head into this evening, increasing cloud cover will keep temperatures in the lower teens. But, we will be adding to our snow totals, as a low pressure system off the coast of South Carolina helps to bring in more moisture.
The low will bring the moisture, but it will be the upper level dynamics from a trough that will help create the light to moderate snow. Moderate to occasionally heavy bands of snow will spread across the Rhode Island-Massachusetts border towards the Cape and Islands. So, we can expect higher snowfall amounts the further east. Due to the possibility of another 2 inches of snow or more, a Winter Weather Advisory is in effect for Providence and the rest of southern Rhode Island from 10 p.m. to 7 a.m. Wednesday. I believe Boston will see 2-4 inches, and being closer to the 2 inch side. Heavier amounts will be furthest east. In the snowfall map, I like where the line is drawn, but the amounts are about an inch too light.
We will see partly to mostly sunny skies by Wednesday afternoon, as a high pressure system from the Rockies helps bring dry air over Southern New England.A cold front now in the Northern Plains will bring some reinforcing cold air back over the region for the rest of the week. Also, the high should keep a low pressure system forming off the coast of North Carolina from moving along the coastline. The low is forecast to move out to sea, and keep any precipitation away from eastern Massachusetts. But, despite bright sunshine, high temperatures will only reach the lower 20’s, with low temperatures in the upper single digits. Temperatures will warm slightly on Saturday, as highs reach the middle to upper 20’s.
The high will begin to move off to our east on Sunday, as some weak disturbances move closer to New England. A wave of moisture will find its way over us Sunday night, creating the risk for some light snow. As we head into Monday, wet snow will change over to freezing rain and/or rain, creating for messy streets once again. Any slush or wet puddles will re-freeze Monday night, as temperatures head into the upper teens. We may have another shot at some snow next Tuesday night, as a low from Texas brings a lot of moisture towards New England for next Wednesday. It is way too early if the precipitation will be snow or rain. At this time, the American model believes enough warm air will make it into New England to keep it as heavy rain.
72 hour forecast:
Tonight: Cloudy with light to moderate snow by 11 p.m. Moderate to occasionally heavy snow bands expected for Plymouth County east to the Cape and Islands. We will see a low of 13.
Wednesday: Light/moderate snow ends by 7 a.m. Two to four inches are possible, with mostly 2 inches in Boston, and higher amounts further east. Mostly sunny skies expected by the early afternoon. We will see a high of 32 with west-northwest winds of 14-17 mph.
Wednesday night: Partly cloudy with a low of 9. Winds will come from the northwest at 7-10 mph.
Thursday: Partly sunny with a high of 22.
Thursday night: Partly cloudy skies and cold again with a low of 8.
Friday: Mostly sunny with a high of 22.
Friday night: Partly cloudy with a low of 7.
Saturday: Mostly sunny. Highs 25-28, lows 10-13.
Sunday: Partly sunny in the morning, with overcast skies by sunset. Light snow begins by midnight. Highs 32-35, lows 25-28.
Monday: Wet snow changing to freezing rain/rain by late morning expected until late afternoon. Highs 36-39, lows 19-22.
Tuesday: Partial sunshine in the morning gives way to overcast skies with light snow or rain/snow mix by 10 p.m. Highs 31-34, lows 30-33.