Heavy rain possible Sunday and Monday, but it will be a bit cooler too

Showers and thunderstorms are likely for Long Island before 2 a.m. tonight, according to the National Weather Service's most recent forecast. A severe thunderstorm watch has been issued for New York, Kings and Queens counties through 11 p.m., but there is only slight risk of severe thunderstorms outside the watch area and most if not all of the Island should be spared, according to the forecast.

But heavy rain on Sunday afternoon through Monday could result in limited flash flooding in certain areas on Long Island, the weather service said. Parts of Nassau and western Suffolk could see more than 3 inches of rainfall, according to weather service reports. Areas in eastern Suffolk are forecasted to see less, with Westhampton predicted to see less than 2 inches and Montauk 1.5 inches.

But it won't be as hot as it's been been the last few days. Sunday's heat index — what temperatures feel like — on much of Long Island will be in the upper 80s, about 10 degrees less than on Saturday.