Camera: Nikon D800E
Lens: Nikon VR 16-35mm at 22mm
Aperture: f/16
Shutter Speed: 1/400th
ISO: 200

HDR image using 5 exposures. Edited using Photomatix and Photoshop with sharpening using Topaz Detail.

I have always been fascinated by cloud formations. This image was taken mid day just as a storm was approaching.