Nice! The thumb nail is what originally attracted me to this image. A lot of colour mainly. It looks so nice. When I opened it up in full view I loved the large amounts of vibrant colour but I fount the foreground of the image to be quite soft. This is not a large problem because I think the image as a whole is very successful. It looks to me a thought this image has been cropped a lot.
I do like the composition and the rule of thirds has been used to emphasis the power of the sky. Great! Keep it up!