And They Say Great Lakes Don’t Have Tides...

You sure would not see that at our end of the lake. Our levels in the marina are similar to August and then we have the north wind floods. Is it possible that your levels in the photo are due to the water being blown down south?

MM
Yes. It's a combined effect of seasonal decline and wind and pressure. Today's shot has winds from the NW at 5. Corps of Engineers shows water levels down 2" from a month ago. I believe it was also down an inch in the prior month. The August pic was taken on a day with strong winds from the NW which can stack water up at our house. May have also been falling barometer.
 
How can that type of chart cannot account for the wind moving massive amounts of water? I will grant that some of our marina flooding may be from the north wind effectively damming the harbor so river flow cannot exit.

MM
The Corp reports average levels including levels when the lake lays down typically in the evening.
 
I stand corrected "Seiche effect"

Short-term fluctuations that often occur on the Great Lakes are wind set-up or storm surge, and a phenomenon known as a seiche. A storm surge or wind set-up consists of high sustained winds from one direction that push the water level up at one end of the lake and make the level drop by a corresponding amount at the opposite end.

http://geo.msu.edu/extra/geogmich/seiches.htm

That is a cool find.

MM
 

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