The warm and muggy weather that has festered on Long Island for several days is expected to move out early Saturday night as a cold front brings on thunderstorms and possibly heavy wind gusts, according to the National Weather Service.
A severe thunderstorm watch was issued just after 1 p.m. for Nassau and Suffolk as well as New York City, meaning that "the potential exists for the development of thunderstorms which may produce large hail or damaging winds," the service said. The watch is in effect until 9 p.m.
The humidity, hovering near 70 percent, is expected to stick around through the morning and afternoon hours, with temperatures in the mid 80s across the Island, said meteorologist Joey Picca, in the service's Upton office.
But, temperatures will cool down late Saturday afternoon and evening with thunderstorms expected in the afternoon and evening hours, the weather service said. Storms are expected to end about 11 p.m., Picca said. Wind gusts of 35 to 40 miles per hour are likely, he said.
The weather service issued a special weather statement, in effect until midnight Saturday, for Long Island, New York City, northeast New Jersey and southern Connecticut, projecting possible heavy rainfall leading to potential flooding, damaging wind gusts and lightning.
Sunday's forecast calls for temperatures in the mid 70s on the East End and the upper 70s for the rest of the Island. No precipitation is expected.