Prelude to a Storm

I had been inside a medical office doing portraits of each of the providers. When I went inside there was a clear sky. When I came out these clouds, a winter storm on the horizon, were moving in. I moved to a location with no interfering elements and made the exposures. I think there were four or five exposures that were made with the camera in a vertical orientation and then combined using photoshop. These were done very early in my transition from film to digital using a Fuji Finepix Pro S3 camera and a Nikon lens.