epa10446994 Sea smoke, forms over the water of Boston Harbor, with Boston's Logan International Airport as a backdrop, in Boston, Massachusetts, USA, 04 February 2023. Sea smoke, or steam fog, forms when cold air flows immediately over warmer water. A cold airmass moved into the region setting a new record low temperature for Boston of -9 F (-22.7C), along with wind gusts of 35 mph to 50 mph (56.33kph to 80.47kph) driving windchill temperatures to as low as -40F (-40C). EPA/CJ GUNTHER
