Excellent choice going B&W. Composition is very dynamic, the masts lead the eye skyward, the clouds lead the eye back down at the 10000 feet toward the horizon.
I was curious why the upper area was so blotchy. I downloaded the image and zoomed in. This is what I found. Can anybody explain what happened here? I am suspecting it is a combination of high iso (800) and post processing.
This bugged me so much, I had to try to do a make over (I hope you don't mind).
Editing steps:
1) duplicated the original into new layer
2) set blend mode of duplicate layer to overlay, set opacity to 80%
3) created a gradient layer, set opacity to 60%