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Boston Weather: 45.0°F | Light Rain Fog/Mist

Weather: A Bite of Reality

By Robert Korty

staff meteorologist

It’s the end of January, and the Charles River is ice-free between the Back Bay and MIT. And, after a record high of 64 F (18 C) yesterday, this January is destined to be one of the warmest on record. But if the intermittent snowfall Boston has received this winter has yet to satiate your appetite for wintry precipitation, fear not. This week will have at least one day of weather to please almost everyone.

Low pressure organizing across the central Great Plains today will track northeast to New York state by Thursday night. Meanwhile, a shallow, surface wedge of cold air over Maine and Nova Scotia will slide down the coast today; temperatures will be 35 F (20 C) colder by this weekend than they were yesterday. As the storm tracks east, precipitation will begin to fall through the cold surface layer giving us snow and sleet Thursday. As the winds shift to a southerly flow overnight Thursday, the cold airmass will be eroded, and the precipitation will turn to a mix of snow, sleet, freezing rain, and then turn over to rain as temperatures rise to 40 F (4 C) by Friday morning.

Friday’s warming will be short lived, though; as the storm passes into the Gulf of Maine, strong northwesterly winds on its backside will usher in the coldest air of the season. Though, that’s not saying much, considering how warm this season has been.

Extended Forecast

Today: Rain, possibly mixing with snow, ending early this afternoon, then remaining mostly cloudy. Much cooler, with a high near 40 F (4 C).

Tonight: Cloudy. Low of 26 F (-3 C).

Thursday: Snow developing during the morning, mixing with sleet and freezing rain, and then rain late. Precipitation may be heavy; several inches of snow and ice accumulation are possible by evening, but exact amounts will depend upon the ratio of snow to ice. Temperatures will hold in the upper 20s F (-3 to -1 C).

Thursday night: Snow and ice mixing with rain, then turning to all rain before dawn. Temperatures rising into the mid 30s F (1 to 2 C) by dawn.

Friday: Rain ending early, then clearing. Windy, with a high near 43 F (6 C).

Weekend: Windy and cold. Highs near 30 F (-1 C); lows 15 to 20 F (-9 to -6 C).