A potent storm drawing on leftover tropical moisture from the remnants of the once-mighty Hurricane Patricia is expected to dump at least two inches of rain on the Berkshires and southern Vermont starting Wednesday morning.
Strong winds are likely in the hills and mountains, according to the National Weather Service.
As twin storm centers from the Great Lakes and the Ohio Valley approach and merge, high wind watches or advisories may be issued, according to meteorologist Luigi Meccariello at the government forecast office in Albany, N.Y.
“Wind will be a big concern with this system,” he stated. The system will be tapping into plumes of moisture from the Gulf of Mexico as well as the Atlantic Ocean.
The rain is expected to begin soon after dawn on Wednesday and continue into the late night, causing significant ponding of water on some roadways because of fallen leaves clogging storm drains and culverts. The heaviest rainfall is due from Wednesday afternoon until early Thursday.
Because rivers and streams are running somewhat below normal due to persistent dry weather, flooding is not expected.
North Berkshire is targeted for the strongest winds with the storm, AccuWeather.com predicted, with sustained winds of 20 miles an hour and gusts to 40 mph starting early Thursday.
Temperatures are likely to be in the 60s on Wednesday, but will cool down significantly on Thursday as the bulk of the rainfall moves out of western New England.
For Halloween weekend, dry and seasonably chilly weather is forecast with nighttime lows in the 20s and daytime highs from 45 to 50, Meccariello said.
So far this month, just over one inch of rain has been recorded at Pittsfield Municipal Airport, about one-fourth the average amount for October, while temperatures have been somewhat below normal.
At Harriman and West Airport in North Adams, rainfall has totaled 1.26 inches, compared to an average of 3.96 inches for the first 27 days of the month.
The region’s driest conditions are in South Berkshire, Meccariello reported. “The rain definitely will be beneficial,” he said.