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Summary: The last in the series of jet stream disturbances to rotate through the region this weekend looks a little more vigorous than it did yesterday. In fact, it will be vigorous enough to generate a weak and diffuse surface low pressure system that will move rapidly through New England and off the coast Sunday night. As a result, I think snowfall totals, although still relatively light, may be a little greater than I forecast yesterday. Snow will likely develop late in the day Sunday, between about 4 and 6 pm. The snow should be relatively steady through the evening, ending by midnight. Snow should be mostly light, although there may be a few moderate bursts. Most likely accumulation totals will be 1-2″.

Saturday Night

Mostly cloudy and not quite as cold as previous nights. There is a chance of a snow flurry or snow shower, predominantly after midnight. Probability of precipitation 30%. No accumulation expected.

Low temperatures in the low teens.

Light northwesterly winds.

Sunday

Partly sunny early. Becoming overcast by noon with snow developing between 4 and 6 pm. Continued cold.

High temperatures near 20 in Pittsfield, Lee, Stockbridge, Adams, North Adams and Williamstown; low 20s in Great Barrington and Sheffield and; upper teens over the elevated terrain.

Light westerly winds, shifting to westerly and then southerly during the afternoon.

Sunday Night

Snow during the evening, ending by midnight. The snow will be mostly light with a few moderate bursts possible. Probability of precipitation 80%. Most likely snowfall accumulations 1-2″. Remaining overcast after midnight, becoming breezy with partial clearing toward daybreak.

Low temperatures in the low to mid teens.

Light southwesterly winds in the evening, shifting to northwesterly and increasing to 10-15 mph after midnight.

Monday

Partly cloudy, breezy and cold.

High temperatures near 20 in Pittsfield; low 20s in Lee, Stockbridge, Adams, North Adams, Williamstown, Great Barrington and Sheffield and; mid to upper teens over the elevated terrain.

West-northwesterly winds at 10-15 mph.