The above image shows what I believe to be stratocumulus clouds above Boulder around sunset on 10/17/23. I increased the saturation as I thought it highlighted the detail in the clouds more and made the image more dramatic. The reflection of light from the sunset off the massive sheet of clouds rolling in is stunning but also makes me feel a bit uneasy. I believe these are stratocumulus due to their sheet-like appearance with some gaps between clouds and the low altitude.
My clouds appear relatively low in the sky and based on the Skew-T diagram below, it appears these clouds are stable which I believe matches the connected, sheet-like nature of those depicted above.