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Snow rollers dot a field near Oil City, Pa., Monday, January 27, 2014. Snow rollers are the result of an ideal combination of temperature, snow and wind. “A lot of time they call them snow rollers”, National Weather Service meteorologist Alicia Miller said, referring to the typical cylindrical shape of the naturally-occurring formations also known as snow doughnuts, snow pipes, snow onions and snow logs. (Photo by Jerry Sowden/AP Photo/The Derrick)
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