Wednesday on Long Island will be mostly sunny with a high about 86 degrees, but clouds roll in overnight, with a 50% chance of thunderstorms by the Thursday morning commute, according to the National Weather Service.

There's a 30% chance of showers and thunderstorms after 3 a.m. Thursday, increasing to 50% by the morning. The low Wednesday night will dip to about 72 with Thursday's high climbing to 89 before dropping to 72 after dark, the weather service said.

Despite a threat of rain, the heat index will about 97 Thursday.

"The chance for unsettled conditions remains for much of the day on Thursday and into Thursday night as the area remains in the warm sector of the frontal system," the weather service said.

There is another chance of rain and storms Friday afternoon and evening. Highs in the upper 80s are predicted.

But the weekend is expected to be dry and sunny, with highs in the mid-80s. 

And, the weather service said, humidity will "generally be less over the weekend," before increasing Sunday night into early next week.

Sunshine and highs in the mid-80s are predicted for Monday.

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