The National Weather Service has issued a severe thunderstorm watch for all of the Metropolitan area, including Nassau County, in advance of a large band of thunderstorms moving toward Long Island.
One lightning storm has already skirted the North Shore of Long Island Wednesday afternoon and more are expected to pop up throughout the afternoon and evening, the NWS said.
Just after 4:30 p.m. the NWS issued a flash flood warning for this area until 6:30 p.m., advising the public to avoid flood areas.
The severe thunderstorm warning is in effect until 9 p.m. because of a large cold front moving northwesterly toward Long Island Wednesday, according to the NWS.
A heat advisory is also in effect this afternoon.
Temperatures were hovering in the lower 90s Wednesday afternoon with a heat index approaching 100 degrees.
The temperatures will change dramatically after the storm system passes through.