Ok never heard that term before, what does it mean when a lake "turns over"?  Is it a fall thing?

Here is an article that we have that will help you out.

http://www.bassresource.com/fish_biology/destratification.html

I live in NE PA and we have been having record highs and near record whighs for lat Sept anf Oct, still in the 80's and down to 50's at night OUR LAKE NOT TURNING YET and with little rain we have patterened the fish and this is absolutley the best fall ever! AVG HIGHS SHOULD BE IN LOWER 60'S WITH FIRST FROST ALREADY HERE!!!!!

Here is an article that we have that will help you out.

http://www.bassresource.com/fish_biology/destratification.html

And here's another.  

http://mdc.mo.gov/documents/fish/aquaguides/turnover.pdf

Im fishing in NH and we havent even come close yet to any of our lakes turning over yet. Im still reading lake temps in the 60s. We have a long way to go before lakes start turning over. Unless we hit some really cold weather soon.

tell me about it. I live in NE Mass, and we are still getting 80 degree days. The lows are in the 50's, so I'm guessing the ponds cool alot over night, but by mid afternoon, they must be warmed right back up. I have a feeling all of a sudden, one cold front will move in, drop temps intot he 60's and 50's and thats the way they will stay. So for us Northeast guys, get all the bass fishing in you can, cuz soon enough you'll be grabbing those UL's and the power eggs and going trout fishing.

tell me about it. I live in NE Mass, and we are still getting 80 degree days. The lows are in the 50's, so I'm guessing the ponds cool alot over night, but by mid afternoon, they must be warmed right back up. I have a feeling all of a sudden, one cold front will move in, drop temps intot he 60's and 50's and thats the way they will stay. So for us Northeast guys, get all the bass fishing in you can, cuz soon enough you'll be grabbing those UL's and the power eggs and going trout fishing.

To the contrary I live right across the boarder from you in NH and the last time I was fishing last season on Open water for LM Bass was actually Jan 7th this yr. So fish will and can be caught after the lake turns over.

One sign that your lake is turning over is bubbles/foam that stay on top of the water without popping.

FROM THE EXPERTS: The lake starts to turn as the upper layer cools and becomes most dense at 39.2 degrees However it will start to turn as the wind and temps cool the upper layer and it starts to decend.

as these articles show salinity also plays a role

http://www.islandnet.com/~see/weather/elements/turnlakes.htm

http://www.in-fisherman.com/magazine/articles/IF2706_turnover/

http://waterontheweb.org/under/lakeecology/05_stratification.htmlhttp://www.onth elake.net/fishing/turnover.htm

This is a scientific accounting of the process

http://www.mlswa.org/lkclassf.htm