Long Island Sound

The team took 1 litre 'grab samples' of surface water every 3 miles from the East River along the middle of Long Island Sound to The Race, where it meets Rhode Island Sound.

“Hits an embankment at the end of the street, goes airborne over the bluff, off the beach and into Long Island Sound.”

The water temperature in Long Island Sound was about 44 degrees, he said.

The phenomenon, known as 'advection fog', formed as easterly winds blew over the cool waters of Long Island Sound.

It's a case that has attracted attention far beyond this city of 150,000 people on the north shore of Long Island Sound, about an hour from New York City.