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Luna, a black Lab mix, frolics in fresh snow in East Derry, New Hampshire, Thursday, Dec. 27, 2012. The southern N.H. area received about eight inches of snow from the winter storm. (AP Photo/Charles Krupa)

Winter storms hit U.S.

A winter storm system that blew

through Christmas Day with Gulf Coast tornadoes and snow in the nation's

midsection headed for the Northeast, spreading blizzard conditions that slowed holiday travel all week. The death toll rose to six with car accidents on snow and highways.