[WestCoastGal]

I have been lucky enough to see one like that driving through Utah somewhere between SLC and St George. It was so beautiful, we had to pull over and stop.

Someone once explained this phenomena to me, atmospheric crystals or some such thing, I can't remember now. lol

[ravingnutter]

Someone once explained this phenomena to me, atmospheric crystals or some such thing,

That would fall in line with my previous post about cloud seeding. They mentioned something about the particles creating ice crystals in the cold part of the cloud, which then fall into the warm part of the cloud, causing rain.