Metro Boston, North Shore and Metro West: Another round of snow is forecast for Tuesday but this time around it will be milder temperatures that follow behind this storm instead of another bitter cold blast. We may actually have a few days of above normal temperatures through the second half of the week.
But first a word about Tuesday. Low pressure is going to develop south of New England very early Tuesday and quickly jump up the coast during the day to be positioned over southeast Massachusetts Tuesday evening. It will provide a heavy burst of snow through the interior with snow possibly mixing with or briefly changing to rain along the coast in the Boston area south. The onset of snow is mid morning interior to late morning on the coast with the heavier snowfall rates generally in the afternoon. As the low races northeastward toward Nova Scotia the precipitation shuts off quickly early Tuesday night.
Snow accumulations from 4 to 6 inches across the interior, along and west of Route 128/95, with 2 to 4 inches east of the highway toward the coast. The lowest amounts being right along the coastline. It is not out of the question that a few spot 7 inch totals are realized west of the Route 495 belt.
Weather systems are moving at a fast clip this week and that means changeable weather conditions. Even though we dry out early on Wednesday another disturbance may bring a few light showers late day or at night before we briefly dry out again. Then, low pressure will push into southern Canada dragging a warm front through late Thursday or Thursday night followed by a cold front later Friday. A period of showers can be expected Thursday night with steadier and heavier rain likely on Friday.
Meanwhile, after Tuesday temperatures will become milder as the week goes on. Highs may be near 50 degrees Friday after climbing to around 40 Wednesday and the low 40s Thursday.
The seesaw probably continues into the weekend with a dry Saturday and possibly a wet Sunday.
72 Hour Outlook:
Tuesday: Light snow developing mid to late morning, possibly becoming heavy at times across the interior in the afternoon. Slight chance of a mix to or change to rain along the coast. High temperatures low 30s inland to mid 30s coast. East winds increasing to 10 to 20 mph.
Tuesday night: Precipitation ends with partial clearing after midnight and becoming windy. Not so cold, lows in the mid to upper 20s. Northwest winds 15 to 25 mph.
Wednesday: Considerable cloudiness and milder. Chance of a few late day rain showers. Highs around 40. Southwest winds 5 to 15 mph.
Wednesday night: Chance of a few showers early, otherwise partly to mostly cloudy. Lows in the low 30s.
Thursday and Thursday night: Partly cloudy, becoming mainly cloudy overnight with a chance of showers. Highs in the low 40s. Lows in the mid 30s interior to about 40 on the coast.