What a nice mid December day it was Friday as sunshine splashed skies and mild temperatures almost made you forget that it is less than two weeks from the Christmas Holiday. Many areas saw the mercury climb into the mid and upper 40s. Another chilly night is on tap tonight, as most of us will see temperatures dip into the 20s by morning.
A cold front will slowly move across southern New England overnight, with high pressure building into Quebec behind the front. This means chillier air will infiltrate the region Saturday as we expect high temperatures to generally run about ten degrees cooler from those of Friday. Enjoy the sunshine Saturday because it will be the last you see of it for many days ahead as we get into a long duration period of unsettled weather starting Sunday and continuing through most of next week.
Low pressure in the Great Lakes will move eastward, with the high to our north pushing offshore during Sunday. Another low will start to take shape off the coast south of New England and will be the primary player in our weather for Sunday night and Monday. After a pleasant day on Saturday we take a turn for the worse on Sunday as light precipitation will overspread the area. Although light snow will likely break out everywhere it should mix with and change to rain along the coast. Interior sections will continue with periods of light snow or snow showers, with a gradual change to a wintry mix and finally to mostly rain Monday. Sleet and freezing rain are also a possibility through the interior, which could make for hazardous travel into the Monday morning commute, assuming it stays cold enough into early Monday. The heaviest of the precipitation should be late Sunday night into midday Monday. Any snow accumulations would be away from the coast, with up to 2 inches a possibility along the Route 495 belt. This is not likely to be a big storm. That potential comes later in the week.
Showers may linger into Monday night and Tuesday. Temperatures should have warmed enough so that any snow or ice is no longer a factor in the forecast at that time.
Another low, with a much bigger punch, is possible by mid week. This system should ride along the coast and intensify as it moves into the Canadian Maritimes. Right now the thinking is mostly rain on the coast, snow and rain or all snow well inland. More on this system as we get toward the end of the weekend. Please stay tuned.
Five Day Forecast:
Saturday: Sunny and cooler. Increasing clouds later in the day. High temperatures in the upper 30s. Northwest winds gradually becoming northeast at 5 to 10 mph.
Saturday night: Becoming cloudy. Cold, with lows in the mid 20s. Light northeast winds of 5 mph or less.
Sunday: Cloudy and cold. Light snow or snow showers developing later in the day. Highs in the mid to upper 30s. Winds northeast to east 5 to 10 mph.
Sunday night: Precipitation changing to mostly light rain along the coast, with a rain and snow mix inland. A period of sleet and or freezing rain possible inland. Near steady temperatures, with lows in the mid 30s. East winds 5 to 15 mph.
Monday: Rain on the coast, with any mixed precipitation inland changing to all rain and then tapering off during the afternoon. Highs in the upper 30s inland to low 40s on the coast.
Monday night: Mostly cloudy, with a chance of a shower. Lows remaining in the upper 30s.
Tuesday: Cloudy skies, with showers possible. Highs in the low 40s inland to near 45 on the coast.
Tuesday night and Wednesday: A chance of rain along the coast, with a wintry mix possible inland. Highs in the low 40s. Overnight lows in mid to upper 30s.
Wednesday night: A chance of rain mixing with and changing to snow on the coast, mostly snow inland. Lows in the upper 20s inland to low 30s along the coast.