As far up lake as I am, with Beaver periodically dumping very cold water into the lake, I can see the current here at Holiday Island (somewhere around 12 - 14 river miles down stream from the dam). We often have temperature induced fogs in the morning during the summer, and I have found several patterns keyed to whether we have just received a new dose of Beaver.
Small examples: In the late summer when normal surface temp is 85, if we have a late evening electricity peak generation from Beaver, two patterns develop. You can find shocked shad in the river upstream from Beaver town and fish the under side of those schools. In addition, large mouth will move to sloughs and cuts out of the cold current and pick off the lethargic bait fish from the current edges.
When he passed, Chuck was trying to teach me the effects of the cold current on the walleye up here. I am still trying to put that all together, but it definitely changes the holds point and the angle of attack with your baits and lures.