So I'm out grilling dinner, and for a while this evening, the usual cloudless PHX sky in June gave way to some long lasting contrails. I'm always looking at contrails, probably because I was brought up in the 70s when they were more interesting with all of the 4 holers up there. But at around 6:30 PM at pretty much the same time, contrails of 2 airliners to the south made a 90 degree turn to the right almost all the way up to PHX, then a >90 degree turn back down towards San Diego. It was pretty funky to see. A quick look at my phone's flightradar app showed the flights to be these.
The turns seemed even more abrupt than the line on the flightaware graphs.
So what gives? Turbulence? There were no clouds at all to indicate any "weather".
Anyone have an idea?