It wasn’t really “afternoon” any more at 18:15 local, about forty-five minutes before sunset, but it wasn’t really “dusk” either – so let’s call it “pre-dusk,” shall we?
The clouds were beautiful and layered and interesting, but the sun was still really bright. How do I block it just a little so my picture isn’t ruined? Maybe stand right there in the shade of the trunk of that pine tree?
A little further out into the parking lot another option presents itself. The parking lot lights have these huge, smoky colored glass balls on top of the column. What if I stand right in the shadow of that? I like that one a lot!
Over by the car, not being blocked by the building any more, there looked to be some sort of mechanism at work in multiple dimensions and at multiple altitudes, breaking the clouds into rows and ripples. There’s a low-level band of them from center left to lower right, but another very high level group going at 90° to that from center left to center bottom.
Gravity waves, perhaps?