NOTE: WP did not like the cropping of the image; the ‘second’ image in the gallery is the intended crop.
Photo of Denver from Highway 93 taken on 9/30/22. Below is the Skew-T diagram for this day– one can see that around 4400 meters the dew point and temperature measurements are close together, meaning that clouds are likely to be forming at this elevation. Additionally, based on the CAPE value, the atmosphere was unstable at this time. The clouds depicted in this image are likely a mixture between cumulus and stratus clouds.