The vapour having then risen, occupied the upper air in the form of light cirrostratus and cumulus clouds.
Towards afternoon, cirrocumulus and cirrostratus began to appear moving northward.
The resulting cloud forms may resemble cirrus, cirrocumulus, or cirrostratus, and are sometimes called cirrus aviaticus.
The other two genera, cirrocumulus and cirrostratus, are also high clouds.
High-tage tropospheric genus-types, "cirrus", "cirrocumulus", and "cirrostratus", particularly show this duality with both short-wave albedo cooling and long-wave greenhouse warming effects.
At night, high thin cirrostratus clouds can lead to halos around the moon, which indicates an approach of a warm front and its associated rain.
Unlike other high cirrus and cirrostratus, cirrocumulus includes a small amount of liquid water droplets, although these are in a supercooled state.
Cirrostratus at its most characteristic tends to be mostly of the stratiform species "nebulosus", which creates a rather diffuse appearance lacking in structural detail.
