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Long Island weather: Saturday starts cloudy with rain later

A cloudy, rainy and humid Saturday will lead Long Island’s first August weekend this year — but a sun-filled, dry and hot Sunday will redeem it.

Temperatures were in the mid-70s just after 7 a.m. on Saturday across Long Island, said meteorologist Tim Morrin in the National Weather Service’s Upton bureau. Humidity will continue to build throughout the morning hours as increasing moisture keeps a cloud cover, a predecessor to rain that will likely begin around 2 or 3 p.m.

A line of showers will be moving in from northwest to southeast and will linger for an hour or two before skies begin to clear up in Nassau County around 6 p.m., mid-Suffolk by 7 p.m., and the Twin Forks by 8 p.m., Morrin said.

Thunderstorms may pop up, Morrin said, with an “outside chance” for strong storms, including gusty winds and locally heavy rainfall.

“The main threats are locally damaging straight line winds and heavy rain,” the weather service said in a hazardous weather outlook, which also said the area has a slight risk for severe thunderstorms.

“It doesn’t look like it’s going to be a washout of a day. It should be dry in the morning through lunchtime,” Morrin said.

Matt Hammer, a meteorologist with News 12 Long Island, categorized Saturday’s weather as “humid and uncomfortable,” with “changeable sky conditions,” but said to “keep the outdoor plans, just keep-an-eye-on-the-sky type of day.”

“The line of thunderstorms looks broken; it doesn’t look like it’s going to be completely widespread,” Hammer said. “It’ll make its way here about 2 p.m. and it’ll all be out of the way by 6 or 7 p.m.”

Temperatures are expected to reach a high of 87 degrees Saturday, Morrin said, “a lot of it will be depending on how much sunshine we get between the clouds.”

The humidity will be higher than it was the previous two days. “It will feel more humid and muggy, but with a noticeable southwestern breeze during the day.”

The thermometer will drop overnight into the mid-60s, Morrin said.

Sunday, however, “looks much better,” according to Morrin, with sunny skies throughout the day, humidity taking a plunge and a light, westerly breeze with a high temperature of 85. No precipitation is expected.

Long Island remains in a severe drought, Morrin said.

“It’s been a consistent month after month after month that we’re in some level of deficit,” Morrin said. “It all adds up. What we’d be looking for to alleviate that is for the opposite to occur, to have several months of above average rainfall.”

The bureau’s forecasting system, which predicts weather patterns up to 10 days, has “no indication” that heavy, consistent rainfall is approaching, Morrin said.

The beautiful weather will stick through Monday and Tuesday, then a possible pop-up storm on Wednesday, with temperatures in the mid-80s through the end of the week, Hammer said.

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