Everything you need to know about clouds – the continuing albeit penultimate story!
If we drill down further, the large scale arrangement of clouds give the genera and species a wide variety of presentation. Some clouds can exhibit multiple varieties at once, so the varieties are not mutually exclusive to one another, and many genera have a number of varieties. The exceptions to this are translucidus and opacus varieties; they cannot occur at the same time.
1. Intortus. This variety of cirrus clouds has irregularly curved and twisted filaments.
2. Vertebratus. Have you ever seen a cloud that looked like a fish skeleton? It was almost certainly a vertebratus cirrus cloud.
3. Undulatus. These sheets or layers of clouds display a wavy pattern. You can find undulatus varieties in cirrocumulus, cirrostratus, altocumulus, altostratus, stratocumulus and stratus clouds.
4. Radiatus. The bands of these separated clouds run parallel to one another and appear to merge on the horizon. Look for them when you spot cirrus, altocumulus (pictured), altostratus, stratocumulus and cumulus clouds.
5. Lacunosus. This cloud variety appears mostly in relation to cirrocumulus and altocumulus clouds. It is marked with small holes in the cloud layer, like a net or honeycomb.
6. Duplicatus. These layers of cirrus, cirrostratus, altocumulus, altostratus or stratocumulus clouds appear in at least two slightly different layers.
7. Translucidus. A large sheet of clouds — either altocumulus, altostratus (pictured), stratocumulus and stratus — that is translucent enough to allow the sun or the moon to shine through.
8. Perlucidus. Yet another variety of clouds in a sheet, these altocumulus and stratocumulus clouds have small spaces between each cloudlet that result in a visible sky.
9. Opacus. The opposite of the previous two varieties, these cloud layers are opaque enough to hide the sun or moon. This variety is found among altocumulus, altostratus (pictured), stratocumulus and stratus clouds.
As their name implies, accessory clouds are smaller clouds associated with a larger cloud. They may be partially connected or separate from the main cloud.
1. Pileus. A small cap or hood that appears above the top of a cumulus and cumulonimbus cloud.
2. Velum. This veil is close above or attached to cumulus and cumulonimbus clouds.
3. Pannus. Appearing mostly along the bottoms of altostratus, nimbostratus, cumulus and cumulonimbus clouds, these are ragged shreds of the cloud that make up a continuous layer.
4. Flumen. These are bands of low clouds associated with supercell storm clouds, typically cumulonimbus. Some flumen clouds can resemble beaver tails due to their broad, flat appearances.
Please come back tomorrow for the last of this wonderful series about clouds.