Summary: Yesterday’s forecast still holds, for the most part, with one significant change. It appears that the strongest upper-level forcing (divergence in the jet stream wind field), and thus the greatest upward motion in the atmosphere (vertical velocity) will be focused to our north tonight. As a result, the heaviest rain will also fall to our north. Instead of 0.50″ of rain it now looks more like 0.10 to 0.25″. It is still looking like a fairly nice fall weekend with good amounts of sunshine both days, although a bit cooler on Sunday.

Thursday Night

Clouding up quickly this evening. Periods of rain developing between 10pm and midnight and ending by 3 or 4 am. Probability of precipitation 90%. Most likely rainfall totals between 0.10″ and 0.25″.

Low temperatures in the low 50s, a few degrees cooler over the elevated terrain.

South-southeasterly winds at 5-10 mph early this evening, increasing to 10-15 mph by late evening and then shifting to northwesterly after midnight.

Friday

Partly cloudy, breezy and cooler.

Temperatures will not rise a great deal over the course of the day with high temperatures near 60 in Pittsfield, North Adams, Adams and Williamstown; low 60s in Lee, Stockbridge, Great Barrington and Sheffield and; mid to upper 50s over the elevated terrain and hilltowns, depending on elevation.

West-northwesterly winds at 10-15 mph, 15-20 mph over the elevated terrain with gusts to between 25-30 mph. Winds will diminish late in the afternoon.

Friday Night

Mostly clear and much cooler than previous nights.

Low temperatures generally in the upper 30s, mid 30s over the elevated terrain.

Westerly winds at 5-10 mph in the evening becoming light southwesterly after midnight.

Saturday

Partly cloudy. Clouds may increase late.

High temperatures in the low 60s in Pittsfield, North Adams, Adams and Williamstown; low to mid 60s in Lee, Stockbridge, Great Barrington and Sheffield and; upper 50s to near 60 over the elevated terrain and hilltowns, depending on elevation.

South-southwesterly winds at 5-15 mph.

Saturday Night

Mostly cloudy with the chance of a shower. Probability of precipitation 40%. Low temperatures in the upper 30s.

Sunday

Partly cloudy and cooler. High temperatures in the low to mid 50s, upper 40s to near 50 over the elevated terrain.