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Long Island weather: Heavy rain, possible flooding, for Friday

It may not be frozen flakes, but rain, heavy at times, accompanied by gusty winds, won’t be making for a smooth holiday getaway Friday, forecasters say.

“A prolific rain storm is on the way,” said News 12 Long Island meteorologist Pat Cavlin, in a tweet Wednesday evening. “Several inches of rain are possible, which may lead to street, parkway, and coastal flooding.”

“A significant storm” is expected to impact the area primarily from late night Thursday through Friday night, the National Weather Service said.

Long Island could be seeing 2 to 3 inches of rain, even higher amounts in some localized spots, the weather service said, based on its late afternoon Wednesday forecast. The rainfall rate could be up to an inch an hour.

Southeast winds gusting to 40 to 45 mph were expected late night Thursday to Friday evening.

Also thunderstorms are possible Friday which could bring spikes in rain amounts for localized areas, as well as take wind speeds up a notch.

Potential impacts include flooding of low lying and poor drainage areas, with a flood watch in effect for Long Island from 1 a.m. Friday to 1 a.m. Saturday.

Also, flooding “could be exacerbated along the coast if the heaviest rain coincided with the Friday morning high tide,” the watch said.

The weather service said there could be minor coastal flooding, locally moderate, in vulnerable areas of the Island’s southern and eastern bays, as well as the Long Island Sound. That would be for Friday morning’s high tide, and possibly Saturday’s as well.

Those wind gusts could also lead to downed trees and power lines, meaning the potential for isolated power outages.

Yet to be pinned down are the location and timing of bands of heaviest rain, which become more evident as the system approaches, the weather service said.

As for temperatures, Thursday was looking to head up to around 50 degrees and Friday to 60, with 41 and 42 the normal highs for those days at Long Island MacArthur Airport in Ronkonkoma.


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