|Greetings from the Critique Club!
A landscape shot with a dramatic sky. The strongest subject here is the sky--it contains the majority of the light, texture and interest.
The composition roughly follows the rule of thirds by placing the horizon line on one of the thirds lines. However the horizon is tilted--this may be due to the presence of a hill but that would not be evident in this image. Once the sky is seen, the eye travels to find another point of interest. The light on the white buildings begs to be noticed, the eye then travels along the lines of perspective created by the building and the diagonal shadow and ends up at a rather non-descript square building off to the left. Had there been something of interest there (perhaps the tower) the image would deliver more satisfaction. Alternatively, if the lit area in the foreground which falls on a thirds point had been more interesting there might be some satisfaction. Unfortunately the eye wanders, bouncing between the detail of the foreground and the light on the clouds. I think this image could be rescued somewhat by cropping out almost all of the foreground leaving just a sliver of the horizon and cropping out the leading lines of the building on the left and the squarish building they lead to. The spectacular part of the image is truly the sky and the most interesting part of the landscape is the tower anad the sheeting rain falling behind it.
As far as meeting the challenge topic goes, I think you almost had it. It is, in my opinion, the lack of control in the composition that hurt its challenge rating.
Overall, a nicely spotted scene!