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Forecast calls for brief return of polar vortex in early April

Snow-covered daffodils in East Marion on Monday, March

Snow-covered daffodils in East Marion on Monday, March 21, 2016, the first full day of spring. Credit: Snow-covered daffodils in East Marion on Monday, March 21, 2016, the first full day of spring.

Early April will bring more than just the Yankees home opener.

A little blast of arctic air will be arriving as well, forecasters say.

Computer models indicate a short-lived cold spell will arrive this weekend thanks to a plunge in the jet stream, allowing the polar vortex — an extremely cold air mass — to take a brief dive south from its regular residence over the North Pole.

There is a 60 percent to 70 percent chance of below-normal temperatures on Long Island from Sunday through April 7, according to the National Oceanic and Atmospheric Administration’s Climate Prediction Center.

Normal highs for the first week of April at Long Island MacArthur Airport are in the low to mid-50s, with lows in the mid- to upper 30s, said Joe Pollina, a National Weather Service meteorologist based in Upton.

The weather service placed Saturday’s highs around the mid-50s, with Sunday’s looking to be near 44.

“It will turn colder as we head into Sunday and the start of next week, and will definitely put a chill on opening day,” which is Monday for the Yankees, said Bill Korbel, News 12 Long Island meteorologist.

Sunday and Monday are expected to be about 10 degrees below the normal high of around 52 degrees, he said.

In addition, forecasters are watching the timing and tracks of two Alberta clipper storm systems that could impact New York at the same time as the cold snap.

However, Mets fans anticipating bundling up at their team’s opener next Friday are off the hook.

That’s because temperatures are expected to be “bouncing back to normal, maybe above normal,” by the middle of next week, said Tom Kines, senior meteorologist with AccuWeather.com.

The cold “is not going to last forever,” he said. Likely by the end of next week, “it will just be a memory.”

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