Unusual Cloud Formations

I like clouds. I find their shapes and formation beautiful and fascinating. I am not one who sees images in clouds - maybe I am not imaginative enough - but I do like spectacular clouds. In the days when I was a more serious photographer I usually incorporated clouds in my images. Tricky business, that. Sometimes clouds can add to the mood, sometimes distract from the subject.

Here is an interesting discussion of different cloud types, the mechanism of their formation (when known), and some striking images as well.