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Forecasters: Typhoon Nuri combines with jet stream dip to bring LI colder air next week

While the Atlantic hurricane season barely affected the region this year, a western Pacific super typhoon -- and its effect on the jet stream -- will mean cooler than normal air late next week for the Eastern United States, forecasters said.

The remnants of Typhoon Nuri, which curved away from Asia to the northeast, were headed to the Bering Sea, and forecast to morph into an intense, nontropical storm -- raising the alarm for hurricane force winds Friday for the Aleutian Islands.

That system is set to merge with the jet stream, as well as a disturbance riding along it, said Erik Pindrock, AccuWeather.com meteorologist. And that's one of several factors expected to cause the jet stream to dip down to the Central and Eastern United States next week, bringing in the colder air.

For Long Island, "the probability is very high for below normal" temperatures next week, but it's too early to say by how much, said David Stark, meteorologist for the National Weather Service in Upton.

But Pindrock said temperatures could dip to about 10 degrees below normal in the region.

Starting Tuesday, the worst of the cold is expected to arrive in areas such as Fargo, North Dakota, Minneapolis, Chicago and St. Louis, according to AccuWeather.com.

For Long Island, the "cooldown" is expected by next Thursday, said Brian Ciemnecki, National Weather Service meteorologist.

However, Stark said, while the air is coming from colder regions, it gets "modified as it moves further south." Another factor could be Long Island's proximity to a still "relatively warm body of water."

For Nov. 13 to 19, the Climate Prediction Center indicates a higher probability -- about 80 to 90 percent -- for below-normal temperatures than there is for at or above normal. Normal highs for that period are from 52 to 54 degrees, Stark said, with lows from 34 to 36.

Back in August, the Climate Prediction Center issued an outlook for an above-average chance of above-normal temperatures for the three-month period from September to November.

But as of now, AccuWeather.com is calling for November through January to have average temperatures or a little below.

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