Northeast facing icy mess as plunging temps follow storm

NEW YORK — Plunging temperatures ushered in by the storm that plastered the Northeast turned the snow and sleet into rock-solid ice, leaving roads and sidewalks treacherous Wednesday and making shoveling seem like hard labor.Tuesday's powerful nor'easter paralyzed much of the Washington-to-Boston corridor, but fell short of the predicted snowfall totals in New York, Boston, and Philadelphia.The storm, which followed a stretch of unusually mild winter weather, dumped 1 to 2 feet in many pla