Formation of cumulus congestus clouds on land due the centre of the Azores High being further North than usual as per surface pressure chart on the first thumbnail. This allowed cooler air to filter towards the Maltese Islands generating some instability hence the formation of such clouds locally known as l-“Gherejjex ta` Santa Marija“. The cooler sea than recent years seems to have limited the energy required to develop these clouds into fully fledged cumulonimbus clouds full of rain. The second thumbnail shows this cooler air at 850mb height.