Long Island weather: Rain and thunderstorms Saturday

Forecasters posted wet weather predictions, saying rain and thunderstorms are almost sure bets for Saturday.

While the National Weather Service issued a flash flood warning from 2 to 8 p.m. for New York City, Jim Connolly of the Upton-based outfit of the service said that alert didn’t include Long Island.

Nassau and Suffolk, he said, will catch up to an inch of rain and endure winds ranging from 10 to 20 mph. The chance of rain is 80%.

“We’re not expecting major flooding, but there could be isolated flooding, Connolly said. “It’s basically going to be kind of rainy.”

Temperatures will peak at around 80 degrees and dip down to 64 degrees at night under clear skies.

“Sunday looks nice,” Connolly said, adding that the day will feature seasonal temperatures topping off at 80 degrees and declining to 60 degrees at night. “That’s pretty much right at normal.”

Monday will be clear and sunny with a high near 77 degrees, but there is a 30% chance of showers after midnight, the weather service said, adding that night will be mostly cloudy, with a low temperature of around 64 degrees.

Earlier this week the weather service predicted Long Island might get battered by isolated thunderstorms packing wind gusts of up to 60 mph on Thursday, and warned that tornadoes also might be possible. It turned out most of the storm damage was north of the Island — in upstate New York, Connecticut and Massachusetts — though in a report issued overnight the weather service said most storm-related damage was contained to the North Fork.