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Scattered Clouds 53° Good Morning
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Long Island weather: Heat index in 90s, chance of storms

A line of thunderstorms heading toward Nassau County could be capable of delivering “damaging wind gusts and torrential downpours” Tuesday evening, the National Weather Service said in a hazardous outlook issued at 4:15 p.m.

At that time the line was still in Pennsylvania, said Carlie Buccola, a weather service meteorologist based in Upton. She said forecasters have their eyes on the line, “which may not hold together” to make it into Nassau.

The highest chance — around 30 percent — for showers and thunderstorms shifted to Tuesday evening through around midnight, said Brian Ciemnecki, also a weather service meteorologist in Upton. Early morning indicators had been for higher chances earlier in the day.

The heat index was 92 degrees just before 4 p.m. at Long Island MacArthur Airport, where the temperature registered 83 degrees.

The Storm Prediction Center is indicating a slight risk for severe storms for Nassau County and most of Suffolk County, including the East End. That means the possibility of scattered severe storms. The rest of the Island is considered to have just a marginal risk for a possible isolated, severe storm, which would be limited in duration and coverage area. Damaging winds would be the prime threat, and there’s a lower potential for tornadoes, the center says.

Beachgoers should be aware of a moderate risk for rip currents at ocean beaches for the afternoon and evening hours, the service said.

Chance of storms continues Tuesday night, according to the service.

As for Wednesday, temperatures may be around the high 80s, nearing 90, but the good news is that heat indexes, which indicate “feels-like” conditions thanks to humidity, are expected to be right around air temperatures, the National Weather Service says.

“Wednesday will have sun and clouds,” said News 12 Long Island meteorologist Rich Hoffman. “Warm and less humid.”

Though muggy conditions are expected to return in the following days, Bill Korbel, also a News 12 meteorologist says, “I don’t expect humidity levels to get a high as” those from late last week and the weekend.

“It will be warm, though, with highs in the mid- to upper 80s,” which is above this time of year’s normal high of around 80 degrees for MacArthur.

As for the really good news?

“We should finally return to cooler weather early next week,” he says.

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