A thunderstorm with torrential rainfall and lightning hit Suffolk late Tuesday night, starting over Huntington and moving east, the National Weather Service in Upton said.
Wind gusts of up to 50 mph were possible, meteorologists said, and an advisory for minor flooding was in effect for Suffolk County until 1 a.m.
News 12 Long Island meteorologist Rich Hoffman warned of the heavy rain for the night.
"We are so much warmer than normal," Hoffman said.
Showers were expected for the rest of Long Island before 2 a.m. and the chance of showers and a thunderstorm remains afterward, the National Weather Service said.
There was a small craft advisory for the waters off the South Shore from 2 p.m. Tuesday to 6 p.m. Wednesday, the weather service said.
Wednesday and Thursday, with a mix of sun and clouds, were set to cool down to the mid- and lower 60s, then warm up to the high 70s, the weather service said.
Some mugginess will enter the picture through the end of the week, though it will not be oppressive, said weather service meteorologist Adrienne Leptich.
The warm conditions are courtesy of a massive ridge of high pressure building at high altitudes over the eastern United States, said Tim Morrin, another weather service meteorologist.
With Ellen Yan