Formation of cumulonimbus with clear anvil which is evenly spread either because it was freshly developed or because very strong winds at upper levels was lacking. This cloud was the result of an extension of the -20 Degree Celcius line over the Maltese Islands contrasting with the warm surface temperature hence generating instability resulting in such cloud. Such weather phenomena is normal for the area during late October as the sea looses heat slowly into the atmosphere. Such clouds are capable of generating heavy rain, gusty winds and hail as can be seen in the rainfall radar. However, this cloud had moved southsouthwestwards hence did not affect any landmass. The first thumbnail is an enlarged photo of the same cloud.