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Boston weather, metro north and west: More snow Saturday

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There is no doubt this has been a bear of a winter across the Boston area and for that matter most of the country. Outside of a brief respite in January from the winter conditions Old Man Winter has had a grip on us since early December in one form or another. Yesterdays powerful storm was just another example of what has been tossed at us this season and sad to say another storm system will likely impact eastern Massachusetts with more accumulating snow Saturday and Saturday night. Unlike the past storm areas closer to and right along the coast will see the highest snow accumulations. The track of this storm will be offshore and the air mass will be just cold enough to support mainly snow across the Boston metro area.

Low pressure tracks eastward across the Tennessee Valley today to be positioned in southeast Virginia by daybreak Saturday. The system then tracks northeast and intensifies quickly over the open waters during Saturday and Saturday night. The forecast track brings the center of the storm southeast of Nantucket Island Saturday evening as it continues to deepen through the night.

Expect snow to break out Saturday afternoon, possibly mixed with spotty rain at the onset, especially along the coast. Otherwise, the precipitation will be all snow with several inches accumulation likely by the time it ends Sunday morning. The coastal plain will be the last to see the snow or snow showers move out Sunday morning. Winds are expected to ramp up once again as the storm intensifies. Coastal winds may gust to near 40 mph Saturday night.

Snow accumulations of 4 to 6 inches are likely along the coast and generally inside of Route 128/95, diminishing to 2 to 4 inches toward Route 495. These numbers certainly can change as this is a system that bears close watching once it gets out into the open waters and begins to sharply intensify.

Arctic air brings another dose of colder conditions Sunday and especially Sunday night into Monday. Then, a front approaches during Monday and may trigger another round of precipitation later Monday night into Tuesday. Early thinking on this is snow Monday night changing to rain Tuesday. More on this later in the weekend.

72 Hour Outlook:

Friday: Blustery conditions with gusty winds and occasional snow showers into the early afternoon. Gradual improvement to spotty afternoon sunshine with still an outside chance of a passing flurry along the coast. High temperatures in the low to mid 30s. West winds gusting 40 to 50 mph along the coastal plain.

Friday night: Becoming cloudy. Lows in the low 20s. Gusty evening winds will subside to 5 to 15 mph later at night.

Saturday: Snow develops in the afternoon, possibly mixed with a few raindrops along the coast at the onset. High temperatures in the low 30s. Winds turning northeast 10 to 20 mph.

Saturday night: Snow, possibly heavy at times near the coast. Windy with low visibilities. Blowing snow. Lows in the low 20s. North winds 15 to 30 mph, possibly gusting to near 40 mph along the coast.

Sunday: Snow ends early, possibly lingering into late morning along the coast as snow showers. Cold, highs in the mid 20s. Gusty northwest to west winds up to 35 mph.

Sunday night: Fair skies and much colder. Lows in the single digits to around 10 degrees inland to low teens along the coast.

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