I have a series of this cloud approaching Mount Shasta (foothills on the lower right), and then blending in with the Lenticular cloud which was already there. Water vapor. Uh-huh.

The phrase "Clouds like flames burned white across the sky..." filled my mind as these glowed in the evening sunlight.

I think I took fifty photos of this cloud; the rays of light were so pronounced I had to pull off of the freeway and capture the sight. This shot kinda looks like a kneeling Angel holding the sun, her halo would be off to the left, her hem to the right. Okay, all clouds look kinda like angels to me. If an Angel came down from heaven, I'd probably look at him/her and think: "What a cool looking cloud!"