The clouds were really extraordinary on this day. You can see their sheeplike formation better in the other images, but in this one you can see how oddly they are all corralled behind some invisible fence. The sky on the other side was perfectly blue. Sadly, I was unable to get to a better vantage point to show the entire phenomenon - this (as most of the other images from this set) was taken on the freeway from a moving taxi.
This is pretty nice for an "on the move grab shot". I bet you were wishing you could be in better control of location and composition. I like the way you filled the gap in the trees perfectly with the clouds.
Shows the line nicely. From where I was, they were all herded over to the western corner of the sky, above Palos Verdes. Like only they could afford the clouds... :-)