This image of a was taken in Grand Lake, Colorado. The clouds are traveling north east towards Fort Collins. A Canon EOS Rebel T6 was used with a f-stop of 10, ISO 100, and 1/800 sec shutter speed.
I took the following images a couple of minutes apart:
The Skew-T diagram confirms that the atmosphere on this day was unstable. The cloud in focus is a Cumulus cloud and the thin and wispy clouds in the background are Cirrus clouds.
You can find the full report using the following link: