Our first snowstorm of the season is on the way for Friday, but it’s just part of a colder pattern we’re heading into for the weekend and beyond.
Low pressure is moving across the Tennessee Valley this afternoon, and it will head east-northeastward, moving off the Mid-Atlantic coast tonight, passing south and east of New England on Friday as it intensifies. We’ll see snow developing before daybreak, and it may fall heavy at times during the morning, which will result in significant problems for the morning commute. The snow should come to an end by mid-afternoon across the region. Based on the trends in the models since last night, we are adjusting our snowfall forecast upwards a bit, but not that much. Here’s our latest projections:
Southern NH: 3-5″
NH Seacoast/Merrimack Valley: 3-6″
MetroWest/I-495 Belt: 4-7″
I/95 corridor/SE Mass/RI: 5-8″
Upper Cape Cod: 3-6″
Outer Cape/Islands: 1-3″
The storm pulls away Friday evening, and skies clear out as high pressure builds in, setting up a sunny but rather chilly Saturday, with many places likely staying in the 20s all day. With clear skies and fresh snowcover, temperatures will quickly plunge Saturday evening into the teens and possibly single numbers in some spots. Clouds stream back in late Saturday night as another system moves toward the region. While this system looks a bit milder, with southerly winds warming things up a bit on Sunday, the models have been trending less mild with every run. With that in mind, we’ll probably see some snow showers or a little freezing rain develop north and west of Boston Sunday afternoon, changing to rain by evening. Keep this in mind if you are going to be out and about Sunday afternoon. Elsewhere, just plain rain is expected. The rain may mix with some wet snow before winding down around daybreak Monday. After that, some of the coldest air thus far this winter will pour into the region. Temperatures may not rise much, if at all, Monday afternoon. The coldest weather looks to arrive on Tuesday, when highs may stay in the teens, with subzero lows possible Tuesday night. We’ll have more info on that in our Weekly Outlook early Monday morning.
Thursday night: Becoming cloudy, snow developing 2-5am. Low 23-30.
Friday: Breezy with snow, possibly heavy at times in the morning, ending 12-3pm. High 28-35.
Friday night: Clearing, colder. Low 11-18.
Saturday: Plenty of sunshine, chilly. High 24-31.
Saturday night: Clear through the evening, clouds start to move back in late at night. Low 10-17, but temperatures may rise a bit after midnight.
Sunday: Cloudy and breezy with showers likely in the afternoon, possibly starting as snow or freezing rain north and west of Boston. High 37-44.
Sunday night: Showers changing to snow showers before ending by daybreak. Low 22-29.
Monday: Becoming partly to mostly sunny and colder. Temperatures hold steady or drop a bit during the day.