An altocumulus showing vertical development, individual cloud elements have towerlike tops, often in the shape of tiny castles.

They are middle level convective clouds and possibly they should be classified as clouds with extensive vertical development. They are composed of mainly water vapor. They are characterized by their billowing tops and comparatively high bases. These clouds from between 6,500 and 23,000 feet. These clouds are a sign of instability aloft, and may pre [..]

mid-level clouds

A species of middle cloud of which at least a fraction of its upper part presents some vertically developed, cumuliform protuberances (some of which are taller than they are wide, as castles) and whic [..]

A middle level cloud with vertical development that forms from altocumulus clouds. It is composed primarily of ice crystals in its higher portions and characterised by its turrets, protuberances or crenulated tops.

A type of altocumulus cloud with tower-like projections that billow upwards from the base of the cloud. They are evidence of mid-level instability and can be the precursor to the development of cumulo [..]

A middle cloud with vertical development that forms from altocumulus clouds. It is composed primarily of ice crystals in its higher portions and characterized by its turrets, protuberances, or crenelated tops. Its formation indicates instability and turbulence at the altitudes of occurrence.

A middle cloud with vertical development that forms from altocumulus clouds. It is composed primarily of ice crystals in its higher portions and characterized by its turrets, protuberances, or crenelated tops. Its formation indicates instability and turbulence at the altitudes of occurrence. ALTOSTRATUS

A middle cloud, (bases generally 8 to 15 thousand feet), of which at least a fraction of their upper parts show vertical development that forms from altocumulus clouds. These clouds often are taller t [..]

A middle cloud

A middle cloud with vertical development that forms from altocumulus clouds. It is composed primarily of ice crystals in its higher portions and characterized by its turrets, protuberances, or crenelated tops. Its formation indicates instability and turbulence at the altitudes of occurrence.