This map shows data reported by users of the mPING app during Friday's blizzard in the Northeast. The PING Project hide caption

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This App Uses The Power Of You To Report The Weather

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Punxsutawney Phil climbs on the shoulder of handler John Griffiths. The groundhog did not see his shadow during the 127th Groundhog Day Celebration in Punxsutawney, Pa., on Saturday. Alex Wong/Getty Images hide caption

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Nathan Lee, 5, was using a "wovel" to move snow from his family's driveway earlier today in State College Pa. Nabil K. Mark/Centre Daily Times/MCT /Landov hide caption

toggle caption Nabil K. Mark/Centre Daily Times/MCT /Landov

From 'Morning Edition': The storm and its effects.

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The wicked weather covers a lot of territory. (Image shows conditions as of late afternoon Wednesday, ET. National Weather Service hide caption

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Rescue in Hoboken: Much of the New Jersey city remains flooded and the National Guard has been called in to help rescue stranded residents. Tuesday, this was the scene on one of the city's flooded streets. Eduardo Munoz /Reuters /Landov hide caption

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Broken and non-functional traffic lights hang over an intersection in Atlantic City, N.J., on Monday. Seth Wenig/AP hide caption

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This satellite image from the National Hurricane Center in Miami shows Sandy at 10:03 a.m., Sunday. AP hide caption

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Workers cover an entrance with plywood at a subway station in New York City in preparation for flooding from Hurricane Sandy. Mary Altaffer/AP hide caption

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