Rare formation of mammatus underneath the stratocumulus cloud cover which weather experts cannot fully explain. Could have also been of the lacunosus sub-species. The photographed cloud formed out of large cumulus clouds spreading outwards due to limited environmental instability. As temperature over land increased by the morning sunshine, landmass convection then triggered cumulus cloud formation which upon reaching a stable layer, began to spread out and part of the air bubbles began to descend back to the surface forming the very minute mammatus features within the then stratocumulus cloud cover. In fact, the satellite image on the first thumbnail confirms this. Furthermore, the wind was almost calm hence by warming of land, sea breezes were quickly initiated with the second and third thumbnails showing opposing wind directions towards the west and east of the Maltese Islands. On the same day, funnel clouds were also observed alongside with very localized rain showers in spots. No thunder was heard or recorded.