Officials warned waders, swimmers and fishermen to stay away from the lakefront Wednesday night as a precaution.
The National Weather Service says a storm front crossed over the lake Wednesday afternoon, causing a 2-foot drop of water levels on the east side of the lake. It warned that as a result, a 2-foot rise on the west side was possible.
Seiches occur when strong, sustained winds cause large amounts of water to move from one part of a lake to another, like water sloshing around in a bathtub.
The weather service says water fluctuations and dangerous rip currents are still possible.
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