(AP) – A “bomb cyclone” that brings heavy snow to parts of the Carolinas and ushers in frigid temperature to much of East Coast Saturday is likely to persist into Sunday. Charlotte, North Carolina, saw one of its heaviest snowfalls in years — about a foot or more fell in the region. Treacherous road conditions led to an hours-long backup on Interstate 85 northeast of the city. The state highway patrol said it counted at least 750 traffic collisions Saturday, but none was fatal. Temperature dips below freezing in many areas, and the frigid cold is expected to plunge as far south as Florida. Forecasters say the subfreezing weather will persist in the East into February.