This picture was taken in Golden, Colorado on the evening of September 20, 2020, facing west. There was rain on and off previous to this image. There appear to be low grey stratus clouds, high white cirrus clouds, and a mature to dissipating stage of cumulonimbus in the bottom right corner. The original image and the SkewT diagram are shown below. The diagram indicates some instability, with a CAPE value of 84.23.
SkewT diagram of the evening of September 20th at DIA