Formation of a very small cumulonimbus capillatus incus due to a bubble of cumulus congestus cloud reaching upper-level stability and spreading out to form a small anvil on the left hand side. The first thumbnail is another photo of a cumulonimbus anvil along with a cumulus congestus cloud having a large vertical extent and which had formed on land due to strong daytime heating. A similar weather situation happened on the previous day as was described here, however it had not resulted in any local thunderstorms. The weather situation on the day was a broad high pressure system over Russia directing a very light and unstable easterly current towards the Central and Western Mediterranean including Malta.