On my way to Greybull Pass to then climb Brown Mountain, I turned to nervously and admiringly watch this developing storm. I wasn't so full of admiration when it was dumping hail on me and my peripheral vision was filled with scenes of lightning about an hour later.
This is in Brown Basin above timberline. The ridge in the foreground is a spur of Mount Crosby, and in the distance is Spar Mountain.
Absaroka Range (WY), July 2007