Find out more about the clouds in the sky including what clouds are made of and the different types of clouds.
The fluffy, cauliflower-shaped cumulus are one of the most common and distinctive types of cloud. All cumulus clouds develop because of convection.
Stratocumulus clouds consists of large, rounded masses of stratus that form groups, lines or waves.
Stratus clouds tend to be featureless, low altitude clouds that cover the sky in a blanket of white or grey.
Altocumulus clouds are generally associated with settled weather and will normally appear white or grey with shading.
Altostratus evolves as a thin layer from a gradually thickening veil of cirrostratus and is usually grey or blue in colour with very few features.
When altostratus thickens and becomes rain-bearing, it becomes a nimbostratus cloud.
All high clouds are a type of cirrus, a common cloud that can be seen at any time of the year.
Cirrocumulus are a relatively rare cloud forming ripples which may resemble honeycomb.
The thin, layered Cirrostratus cloud is composed of ice crystals and forms a veil that covers all or part of the sky.
Noctilucent clouds are extremely rare very high clouds seen in the night sky, usually on clear, summer nights.
Find out more about mammatus clouds.
In this article we find out more about what banner clouds are and how they form.
Find out more about funnel clouds in this article.
Altocumulus castellanus clouds take their name from their resemblance to the turrets of castles and are often a warning of thunderstorms.
What happens when rain falls but doesn't reach the ground?
A fallstreak hole (also known as a holepunch cloud) forms when part of the cloud layer forms ice crystals which are large enough to fall as a 'fallstreak'.
Undulatus Asperatus is currently being assessed by the World Meteorological Organisation to decide whether it should become a supplementary feature of mamma clouds in the International Cloud Atlas.
Arcus clouds are low-level, wide ranging clouds typically associated with powerful storm clouds and thunderstorms.
Lenticular clouds are a distinctive cloud formation resembling lenses and are thought to be an explanation for some supposed UFO sightings.
Sometimes known as mother of pearl clouds for their distinct appearance, nacreous clouds are laced with vivid iridescent light from below the horizon.
Resembling evenly spaced rolling ocean waves, Kelvin-Helmholtz are one of the most striking and rare cloud types.
Last updated: 6 August 2014