Spreading out of cirrus originating from cumulonimbus clouds that produced offshore heavy thunderstorms to the east and southeast of Malta. The large cloud in the main photo is “Cirrus spissatus cumulonimbogenitus” that was still transitioning from a cumulonimbus capillatus incus cloud hence still retaining the shape of it. The first thumbnail shows the further spreading out and eventual thinning of high clouds being “cirrus fibratus radiatus cumulonimbogenitus” as the rising air bubbles hit a humid upper-level stable airmass which reduced the evaporation rate of high clouds allowing them to spread. The second thumbnail shows a localized heavy rain shower panorama occuring in approximately the same place which was taken 90 minutes earlier from the main photo during the peak of an isolated thunderstorm. The heavy nature of the rain is clearly evidenced on the left-hand side through a curly ending of the shower from bouncing rain drops off the ground. There is also stratocumulus clouds which seemed to be developing into cumulonimbus clouds. The third thumbnail is another beautiful photo of a still transitioning cumulonimbus anvil cloud that formed locally on the 19th September due to a small elevated cold pool at 925mb. In fact, rain could still be noticed falling from part of that cloud. The weather sounding on the fourth thumbnail shows a weakly capped and moist unstable airmass with light winds throughout the entire levels of the atmosphere whilst the fifth thumbnail shows a line of bad weather close to the Maltese Islands represented by a solid black line in the surface pressure chart. This acted as a trigger to develop thunderstorm clouds which formed single cell upright cumulonimbus clouds and dissipating in approximately the same area as there was no wind shear to tear the clouds apart. The sixth thumbnail is an a mobile app showing the very isolated nature of this storm under description.