The other day I was wondering how far up you need to go in order not to have turbulence anymore. The higher you go, the lower air density, and there for the lower the turbulence effects in absolute terms. However, since your wing load is lower, in relative terms it could always be there, right? So presumably you only stop noticing it once you enter orbit and wing lift ceases to be the main force counteracting gravity.
That's the theory (and feel free to correct me if I'm wrong), but how does it work in reality? Obviously a Space Shuttle in orbit won't notice anything, but what would be the limit? Would Concorde often experience turbulence at cruising altitude? If yes, did it feel different from regular turbulence? Storm cells occasionally go up to FL550 (or more?), I seem to remember Concorde would cruise up to FL600.
Just curious, hopefully some people with experience can enlighten.