Can somebody explain this to me?  I found a slough before a tournament that was holding some really nice fish.  During the tournament there was nothing there and I talked to a guy in the slough and asked if he was having any luck and he said no the water is turning over in here these fish are probably gone by now.   I was wanting to learn more about that.

http://www.takemefishing.org/fishing/fishopedia/how-to-fish/when-to-fish

About a third of the way down the page, it talks about water turnover.

Isn't this an event which occurs later in the year like Fall/early Winter when the top levels of water cool, get denser and sinks and the warmer water below rises and replaces the cooler water?

First off, the term "turnover" should not be taken literally. The top and bottom layers do not actually switch positions, instead, the layers mix to from a condition were the temperature is uniform throughout the water column.

Now, if you're fishing in Alabama, the lake was not mixing. Southern lakes are monomictic (only mix once per year in the fall).

Many times in the spring or early summer algal blooms will occur and greatly discolor the water, causing some to think the lake is "turning over."

Hope this helps.

You are not experiencing a "stratification" turn over this time of year where you live.

As mentioned you could be seeing a water clarity change due to several factors; rain run off, algae bloom, wind, etc.

Use the Internet and Google "lake turn over", more info then you will ever need to know.

Bass anglers have a lot of excuses why the bass stopped biting and turn over is as good any.

WRB