Mid-flight report -- good first bit, but the seatbelt sign's been on for 40 min; we've had steady mod turbulence over Colorado and Kansas. The weird thing is I can't see anything on the map that would suggest that, including no pilot reports of turbulence over those states! Mystery turbulence.
Flying back now -- a very smooth flight, just a few occasional bumps. Curiously the flight over was turbulent all the way to Florida -- the seatbelt sign almost never came off. I had another "mystery turbulence" flight JFK-SFO last year where the maps seemed good but we had bumps the whole way. Today's flight was a lovely contrast!