The summer rainy season — known as the North American Monsoon — has begun across Arizona. Over the past week thunderstorm activity has increased substantially. Some locations have already received their average July rainfall in only a few days while other locations have had only a trace of rain. Flagstaff has been one of the wet places and has had a tremendous amount of rain, large hail, and lightning and there have been some good opportunities to catch lightning with a camera.
The second image is a composite of two separate photographs taken a few minutes apart with slightly different lighting and cloud structure.