"Imperfection is beauty; madness is genius & it's better to be absolutely ridiculous than absolutely boring. And when it comes down to it, I let them think what they want. If they care enough to bother with what I do, then I'm really better than them."--Marilyn Monroe
Powerful shot, overall.
The only thing I can think of that might improve the image is try taking it from different eye-levels. Maybe if the horizon was 2/3rds down the image, it would put more emphasis on the intense sky.
I like the image though:)