Sunrise made more spectacular

Last weekend as I woke up in Custer a blanket of fog was rolling through the valley. I quickly headed for Stockade Lake on the west edge of Custer State Park and clicked away as the fog cleared over the water.

As beautiful as it was, I had a vision of something even more spectacular like this -

So what did it look like to my camera? Here's the untouched version of the middle exposure in an HDR set and the final image after processing through Photomatix and Photoshop.