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ice sheet

NOAA

TRAVERSE CITY, Mich. (AP) - For the second consecutive winter, bitter weather threatens to turn the surface of the Great Lakes into a vast frozen plain.

The federal Great Lakes research laboratory in Ann Arbor reports Friday that nearly 81 percent of the five lakes' surface area is ice-covered. On Thursday, the ice cover exceeded 85 percent.

  The lab's George Leshkevich says the small drop-off probably happened because winds broke apart some ice, creating open spots.