June’s Cloud of the Month:

We propose that asperatus should be adopted as a new ‘variety’ of cloud, meaning that it is a particular characteristic that appears in one or other of the main cloud types. This would mean that the rough and choppy looking Altocumulus cloud shown above would become known as ‘Altocumulus asperatus’. cloudappreciationsociety

Photographed over Schiehallion, Perthshire, Scotland © Ken Prior.