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Forecaster: Friday shaping up to be 'kind of a washout' on Long Island

Long Island forecast for Thursday, Aug. 20, 2015.

Long Island forecast for Thursday, Aug. 20, 2015. Photo Credit: Newsday/NWS

Thursday evening commuters are likely to get a pass, but those heading to work on Friday morning, especially in Nassau County, are likely to be confronted with widespread rain with possible localized downpours, the National Weather Service said.

On late Thursday afternoon weather-related flight arrival delays were reported at both LaGuardia and Kennedy airports, according to the Federal Aviation Administration's website. Those airports, as well as Long Island MacArthur, were also experiencing some departure delays, with the FAA advising travelers to check with their airlines.

Chances for rain increase overnight, with all of Friday "kind of a washout," said Carlie Buccola, weather service meteorologist based in Upton.

Nassau is expected to be hit harder than Suffolk she said, with a hazardous weather outlook issued for Nassau, indicating the likelihood of locally heavy rainfall late Thursday into Friday, preceding a slow-moving cold front. That also means the likelihood for widespread urban and poor drainage flooding and possible flash flooding, the weather service said.

As for rainfall amounts, Nassau could see close to an inch, diminishing from west to east, with the East End looking at less than half an inch, this from 8 p.m. Thursday through 2 a.m. Saturday, the weather service said.

News 12 Long Island meteorologists were forecasting showers and thunderstorms Friday with locally heavy rain possible - and gradually clearing skies after noon.

Matt Hammer, News 12 meteorologist, said a late shower or storm is possible on Thursday "but much of the activity holds off until early Friday" with scattered showers and storms with a few late breaks of sun.

Hammer agreed that rainfall Friday "could produce some heavy rain."

The rainfall is ahead of a slow-moving cold front entering the area Friday into Friday night. Because the front is moving so slowly, forecasters said any widespread rain could generate widespread urban and flash flooding and that areas with poor drainage are vulnerable.


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