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Victor Jimenez, of Des Moines, Iowa, gets a push from his dad Guillermo Jimenez, left, as they clear snow off a driveway, Thursday, Dec. 20, 2012, in Des Moines, Iowa. The first widespread snowstorm of the season began a slow crawl across the Midwest on Thursday with some areas receiving as much as 15 inches of snow. (AP Photo/Charlie Neibergall)

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.