Looks like a chart update is in order. Weather is cooling now. My pond was high 60s top and low 60s at 13-14'.. prolly not much of a thermocline, but if there were big fish, good fishing weather. Get out and catch a few and measure gapes.
I'm heading down to the pond for the weekend (20 grit sanding on 1100 sq ft of 50 yo oak floors). Dump lotta data in the thread and I'll post a new chart early next week.