Supercooled water is water that remains liquid below the normal freezing temperature of H2O: 32 degrees Fahrenheit (or 0 degrees Celsius). Trickling over some of the ice was a stream of supercooled water. Ruiz and independent researcher Charles Cranford filmed a 65-foot (20-meter) waterfall in North Carolina that had mostly frozen. On a cold morning in January 2018, physics professor Michael J. Right beneath this icy blanket, however, you'll still find plenty of liquid water flowing on its usual downward path.īottom line: Niagara Falls isn't going to freeze all the way through anytime soon. Under the right weather conditions, those water droplets are liable to freeze as they accumulate on the trees, boulders and railings that surround the falls.Īlso, there are days when a thin layer of frozen spray and mist hardens over the falls. Well, Niagara Falls generates an awful lot of mist, as the ' Maid of the Mist' boat tour will happily remind you.