https://maltaclouds.net/wp-content/uploads/2018/09/Cb-base3-1.jpg?v=156992004015362048adminhttp://maltaclouds.net/wp-content/uploads/2018/10/logo-1-300x138.pngadmin2014-04-18 17:21:202018-11-10 17:23:50Cb cloud base
From a search on the Internet, a cloud photo very similar to this one was found in clouds-online website. The subspecies `arcus` means `With gust collar at the bottom side of the cloud`. However, no wind gusts (at least on ground level) were observed by me (the observer) while taking this shot. The photographed cumulonimbus could have also been `pannus` meaning `with frazzles at the bottom side of the cloud.` The weather situation at the time was that a frontal system had just passed over the Maltese Islands. The weather sounding provides a good measure on the column of the atmosphere at that time.