It took four years but I finally got it.
A rotating supercell. And not just a rotating supercell, but one with insane structure and amazing movement.
I've been visiting the Central Plains since 2010. Usually it's just for a day, or three, or two...but it took until the fourth attempt to actually find what I'd been looking for. And boy did we find it.
No, there was no tornado. But that's not really what I was after. I'm from Arizona. We don't get structure like this. Clouds that rotate and look like alien spacecraft hanging over the Earth.