Cloud Panorama

I went outside today, and when I looked up I saw these beautiful dark gray clouds overhead.  I tried a couple of different views of the sky, but I couldn't get enough of the sky to satisfy myself.  So what I did was to take two photographs - one on the left and one on the right and then using some special software, I combined the two photographs.  This is the result, and doing the combination results in the strange shapes around the edges.  If you click on this, it will open up extra large.