A winter storm is dropping freezing rain and some sleet across much of South-Central Pennsylvania. A winter weather advisory is in effect until noon Thursday. Roads are expected to be icy. Travel restrictions are in effect.

Freezing rain, at its least intense, can create thin sheets of ice that lead to slick, dangerous conditions for drivers and pedestrians. At its worst, according to National Weather Service forecaster Christopher Bannan, thick ice forms on virtually every surface, from roads and sidewalks to rooftops and plants.