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[Dave Terrell]

Earlier this summer while I was sailing Grand Traverse Bay in winds of 2 to 4 kts apparent with calm flat water and no power boats in the area, there suddenly appeared about about ten wave crests - one was a breaking wave - I thiink some of them might have been two feet high. The water around these waves was flat like all the rest of the water on the bay. When they passed - having  bumped me around  pretty well - the sea remained flat and the winds remained at the same speeds for most of the rest of the afternoon. The wave crests went all the way across the bay. I saw an other sail boat get knocked around as I was. The whole event lasted about two minutes - maybe a little more or less.
 
Any thoughts on what this event was? no reported midwest earthquakes or tremors that I know of tha day. The waves did not resemble the wake of a large power boat. To be sure I looked carefully and found none. Later a large power boat passed by and its wake did not resemble what I experienced in any way.
 
really curious. I have never seen this sort of thing before.
 
David, 432
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