I really do enjoy the composition. However, the ground part is so peaceful especially against such aggressive sky that it seems it was taken from another shot. And even if I usually prefer aggresive skies, with clouds like this one I belive that single colour gradient shaded sky without any clouds would be a better add-on to the bottom part of this foto. Anyway, you are not in position of selecting the weather yet and it is still a faboulous shot.
How can this not have any comments? Best I've seen for a while! You've got everything needed; interesting foreground that leads the eye to the subject, a perfect main subject, and then on top of that a truly amazing sky!