I like how you are capturing the sky in most of your recent submissions (and including some other stuff for composition). In this one I wish the foreground was darker..In the large view there is an extra hill and some lights, that I found a bit distracting compared to the thumbnail version. I like how the silhouetted trees are off to a side, but wonder if it would help if the tree didn't touch the edge of the shot (I really don't mind it touching, it's just a thought). I hope I don't sound too critical, I do like the picture...and your other sky shots. I'll be watching for your next one.
I agree with the above comments in that the darker background seen in the smaller image makes for a more dramatic shot. Framing wise, a little border on the right isn't a bad idea, either.
Overall, though, it is a stunning and dramatic capture! Well done.