This photo was taken in the University Hill area, west of the CU Boulder main campus (1339 Broadway, Boulder, CO 80302; 40.0°N, –105.28°W), facing the northwest.
The cloud deck visible in the image is an altostratus-type cloud covering nearly the entire sky, characterized by its smooth and uniform underside. Based on its layered structure and the skew-T figure, the atmosphere at the time was stable.