NORFOLK, Va.—Freezing rain began to glaze parts of the Carolinas late Friday afternoon, while light snow started falling in southeastern Virginia—marking the beginnings of a storm that forecasters say could snarl a region that’s unaccustomed to winter precipitation. “From now through overnight, we’re expecting to get our greatest accumulation of snow and ice,” said David Glenn, a meteorologist with the National Weather Service in Newport/Morehead City, North Carolina. Authorities along the North and South Carolina coast warned that ice accumulations could cause major power outages, while areas northeast of there stretching into Virginia could see several inches (centimeters) of snow. Most of that precipitation is expected to pass by sunrise Saturday. But forecasters said temperatures likely won’t rise above the 30s in North Carolina and Virginia during the day and will drop into the 20s and even teens in some places on Saturday night. The snow will “probably be sticking …