The National Weather Service has issued a winter storm watch for the South Shore of Suffolk County and the East End.

The watch starts late Tuesday night and runs through late Wednesday, with 3 to 8 inches of accumulation possible.

The heaviest snow is expected Wednesday, during the day.

Travel is expected to be hazardous or impossible due to low visibility, especially during the Wednesday evening commute.

Click here for a full National Weather Service PowerPoint briefing on the nor’easter, Long Island’s second in just five days.

On the North Shore, a more serious storm warning is in effect for Suffolk from Cold Spring Harbor through Rocky Point, with 6 to 10 inches expected, according to the NWS.

Photo: In Patchogue during January’s winter storm. (Credit: John Collins/file)