Downtown Missoula, Montana. This is a historic depot and is readily seen from I-90 and main street.
Spending the summer in Missoula, I was always scanning the sly for fast moving storms. I lived close to the depot and saw the clouds coming in, drove to the tracks, set up the tripod in the back of my truck and got this shot. Shortly after I was questioned by the "train police" to see what I was doing so close to the tracks. After showing him my camera he just said "Be careful, and Nice shot !"