This photo was taken on September 8th at 6:59pm facing West on Pearl St. in Boulder. The picture shows stratocumulus or cumulus clouds over the Flatirons. An hour before this photo was taken, the sky was covered with dark storm clouds.

Camera iPhone 15: 1/711, f/1.6, ISO 50, and 6.0 mm focal length.

From the Skew-T, the atmosphere was stable.