Summer Storm - Grand Canyon

It's been somewhat slow lately on the photography front. Not for lack of taking pictures, but just finding the time to sit down and process the RAWs.

I normally don't submit multiple versions of the same scene, but I've been working on prints for a couple of friends here in town, so I figured I'd upload one of the images I've been working on. Hope to submit to the lab this weekend.

Critiques are always welcome.

Technical Details:
Nikon D70s
Sigma DC 10-20 @ 10mm
ISO 250, .5s-.3s-1/5s-1/8s @ F/20
B&W Polarizer