Forecast discussion: After balmy conditions Monday morning, Boston is returning to the deep freeze for the next few days. The warmer air that was over New England has left, thanks to a cold front that passed through during the afternoon. Now, a second front will pass through during the overnight, and may create a few snow squalls. Some areas may even see up to an inch of snow by Tuesday morning.
Over the next couple of days, a polar vortex over the eastern U.S. will bring very cold air over New England. Temperatures will not even make it to 20 degrees as a high, and wind chills will make it feel like 5 to 10 below zero. We will see air temperatures in the upper single digits Tuesday night, and wind chills will make it feel like 10-15 below zero.
By Wednesday, we will begin to see milder air move up from the southern U.S. The polar vortex will be slowly moving back to the north, allowing the jet stream to pick up milder air from the southern U.S. High pressure will continue to give us dry conditions through the week, although we will see more clouds than sun by Thursday.
As we look towards the weekend, a cold front will slowly move towards the eastern U.S. We will see showers by late Saturday morning, with heavier rains and some gusty winds Saturday evening. This will make for a wet night at Foxboro for the Patriots-Colts playoff game. Temperatures will remain mild next Monday, as the front moves offshore, and precipitation ends by early Monday afternoon.
72 hour forecast:
Tonight: Partly cloudy with possible snow showers during the overnight. Snowfall will just be a coating to half an inch. We will see increasing winds and a low of 14.
Tuesday: Partly to mostly sunny, windy, and very cold with the high only reaching 18. The Cape and Islands may see some ocean effect snow showers through the day. Winds will come from the west at 17-22 mph with gusts of 30 mph.
Tuesday night: Partly cloudy with a low of 7. Winds will come from the west-southwest at 8-11 mph.
Wednesday: Mostly sunny with a high of 23.
Wednesday night: Partly cloudy with a low of 17.
Thursday: Partly sunny and warmer with a high of 31.
Thursday night: Partly cloudy with a low of 19.
Friday: Partly to mostly sunny. Highs 36-39, lows 25-28.
Saturday: Overcast with rain showers by the late morning, and heavier rain by the evening. Highs 43-46, lows 35-38.
Sunday: Rain tapering to showers by dawn, and all precipitation ending by the late morning. Some peeks of sunshine possible before sunset. Highs 45-48, lows 33-36.
Monday: Showers/rain by the early morning, before precipitation ends in the early afternoon. Highs 42-45, lows 31-34.