Hurricane Sandy has become the largest tropical system recorded in the Atlantic as it makes the transition to a superstorm that threatens to push a wall of water ashore in the Northeast and smash the eastern U.S. with wind, rain and snow.
Drenching rains are soaking the mid-Atlantic states, 3 feet of snow may fall in the Appalachians and an 11.7-foot (3.5- meter) record-breaking storm surge may slosh over Manhattan’s Battery Park if Sandy’s most powerful punch arrives at the same time as the high tide.

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