While we photographed beautiful Tenaya Lake and Mount Conness the storm clouds boiled and roiled over our heads.  I was pretty much focused on the mountain and lake until I looked up and saw the drama taking place high overhead.  So I rotated the camera to get a vertical composition and was rewarded with this one.

The Sierra Nevada Mountains are formed from the most magnificent granite, especially in the Yosemite area.  After two million years of advancing and retreating mile-deep glaciers it still stands strong.  It is this granite that forms the impressive domes that are so much of the Yosemite landscape and make this image so captivating. The fact that the hard rock and feathery clouds are in harmony makes it all the more fascinating.