Forecast discussion: A strong high pressure system over the Southern U.S. has brought us nice but colder weather to Boston for the last few days. This high brought us only a high temperature of 32 degrees at Logan Airport on this first day of 2015. Unfortunately, we will continue to see a very cold weather pattern over Southern New England for most of the forecast period.
A dry cold front will be coming down from Canada by this evening, and passing through the area tomorrow. This will cause the winds to increase, making it feel a little cooler than normal. High temperatures will be in the middle 30’s into Saturday.
By Saturday night, a low pressure system nor bringing rain to Louisiana and Arkansas will move into the central U.S. The low will allow for increasing clouds Saturday afternoon, with the threat of a passing snow shower before sunset. We can expect snow showers to arrive right after sunset, before warmer air begins to filter into the region. So, the snow showers will mix or change to sleet and freezing rain. But, by early Sunday morning, temperatures will rise enough at the surface to make it just plain rain. The precipitation may end as some snow showers by late Sunday night.
We will have a brief period of dry weather for Monday, but the warm temperatures we experienced on Sunday will be gone. Another blast of cold air coming from the North Pole will lower the mercury some 15 degrees. A very quick moving Alberta Clipper may bring us the first measurable snowfall come Tuesday afternoon. The clipper will be offshore by early Wednesday morning, and we will return to dry weather by the middle of Wednesday morning. Any snowfall will help reflect the sun’s rays back into the atmosphere, which is why the temperatures are colder on next Thursday than the previous day.
72 hour forecast:
Tonight: Clearing skies with a low of 26.
Friday: Mostly sunny and breezy with a high of 37. Winds will come from the west-northwest at 14-17 mph.
Friday night: Partly cloudy with a low of 22. Winds will come from the northwest at 9-12 mph.
Saturday: Mostly sunny in the morning, with increasing clouds through the early afternoon. We will see a high of 35.
Saturday night: Overcast with snow showers arriving by 5 p.m. Snow showers will mix with sleet or freezing rain by 9 p.m., before becoming rain by 1 a.m. We will see a low of 30 before temperatures rise during the overnight.
Sunday: Rain tapers to showers by the early afternoon. We will see a high of 50.
Sunday night: Showers may change to snow showers by midnight, with all precipitation ending by 4 a.m. We will see a low of 32.
Monday: Mostly sunny and much colder. Highs 33-36, lows 18-21.
Tuesday: Partly sunny in the morning, with overcast skies and snow showers by 3 p.m. Highs 28-31, lows 18-21.
Wednesday: Light snow ends by 4 a.m. Partly sunny skies expected the rest of the day. Highs 28-31, lows 14-17.
Thursday: Mostly sunny. Highs 23-26, lows 15-18.