Storm in the east

This image was part of a timelapse with images at 45 second intervals from before sunset through the middle of the night. I was hoping for some lightning activity and while not a lot, I did get a few bolts and some lit up clouds. This image was taken at 38mm focal length with an exposure of 3.2 seconds at f/5, ISO 400. The southern part of Tucson is at the left in this view from Kitt Peak.