A rapidly rising tower of cumulus congestus cloud into the already developed anvil of a former cumulonimbus cloud to become cumulonimbus capillatus incus. The first thumbnail is a panorama of various cumulonimbus clouds of the same species covering much of the horizon whilst the second thumbnail is a cumulus congestus cloud at sunset whose background on the left hand side shows a developing cumulus radiatus cloud indicating a common lifting mechanism. The photographed cumulonimbus clouds had all developed on the eastern side as confirmed by the visible satellite image on the fourth thumbnail due to sea-effect phenomena occuring exclusively in that zone on the eastern flank of a large high pressure system, check the surface pressure chart on the fifth thumbnail. The weather sounding on the third thumbnail showed a very unstable atmosphere for Winter but with little wind shear due to a constant flow of very cold Northerly winds being driven down from the Balkans and generating those sea-effect cumuliform cloud formations due to the large difference between sea surface temperature and temperature at an altitude of 1500 metres, the latter being driven by the jet stream. This sentence is graphically illustrated through the last 3 thumbnails in this series. Since this cold wind travelled over a comparatively larger sea stretch largely missing the Italian landmass, the formed cumulonimbus clouds had the potential to be 5km thick, that is between 880m and 5820m.