Northeast braces for snowstorm

BOSTON, Massachusetts — A densely populated swath of the Northeast was preparing for winter's harshest thump yet, a fast-moving storm that could bring more than a foot of snow, strong winds and coastal flooding.Some places were poised to experience an atmospheric yo-yo: Philadelphia and New York hit 60 degrees on Wednesday, were expecting at least a half-foot of snow on Thursday and were bracing for bitter cold temperatures Thursday night."This is going to be a big punch," said Benjamin Si