Here's what may have caused an unusual swirl in Lake Pend Oreille 

A picture of an unusual swirl in Lake Pend Oreille stumped many community members and experts alike. The photo was taken by Art Groeneweg from a plane on Sunday. KREM 2 reached out to many experts in the area and Professor Frank Wilhelm from the College of Natural Resources at University of Idaho had an idea of what could have caused it.
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