ATLANTA (AP) — Snow and ice across the U.S. South are expected to relinquish their grip only slowly as the weekend continues. Major airports including Atlanta and Charlotte, North Carolina continued to report disruptions Saturday,. Temperatures are expected to plunge after sundown Saturday, raising the risk that melting snow will refreeze, turning roadways treacherous. The storm that brought snow to the South was forecast to move out to sea off the East Coast on Saturday, leaving behind snow showers in the Appalachian Mountains and New England. Richmond, Virginia, lifted its boil-water advisory Saturday, nearly a week after an earlier snowstorm cut power and caused a malfunction to the city’s water system.