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Cirrostratus / ˌsɪroʊˈstrɑːtəs / is a high-altitude, very thin, generally uniform stratiform genus-type of cloud. It is made out of ice -crystals, which are pieces of frozen water. It is difficult to detect and it can make halos. These are made when the cloud takes the form of thin cirrostratus nebulosus. [1] .
While they might not have the attention-grabbing power of their more flamboyant cousins, such as cumulonimbus or cumulus clouds, cirrostratus clouds have a unique charm of their own. In this...
Cirrostratus are transparent high clouds, which cover large areas of the sky. They sometimes produce white or coloured rings, spots or arcs of light around the Sun or Moon, that are known...
Cirrostratus at Night Night-time cloud watching has its challenges, but this photo captures the moon just as it illuminates a nice stratus section of the cloud. This is probably cirrostratus (ice cloud) because of the rainbow effect around the moon, but could also be altostratus. Photo from Sant Antoni Abat School, Valencia, Spain.
Cirrostratus clouds indicate upper atmosphere moisture and turbulence, often indicating a change in weather. Atmospheric effects of cirrostratus clouds include halos, sundogs and sunpillars. Cirrostratus clouds form above 20,000 feet.
Cirrostratus is a subtle, understated cloud that can easily go unnoticed – except, that is, by CloudSpotters, keen to complete all ten of the main cloud types in their collection. A delicate layer of ice crystals, often spread over vast areas of the sky, Cirrostratus can appear as no more than a light, milky whitening of the blue.
Cirrostratus are sheet-like, high-level clouds composed of ice crystals. Though cirrostratus can cover the entire sky and be up to several thousand feet thick, they are relatively transparent, as the sun or the moon can easily be seen through them.
Cirrostratus clouds belong to the High Cloud (5000-13000m) group. They are sheetlike thin clouds that usually cover the entire sky. The sun or moon can shine through cirrostratus clouds . Sometimes, the sun or moon will appear to have a halo around it when in the presence of cirrostratus.
The coldest cirriform clouds (i.e., cirrus and cirrostratus) can be −80°C or lower in deep storms with high cloud tops (>15 km above sea level), such as in anvils associated with thunderstorm outflow. Because of their icy composition, cirrus and cirrostratus clouds are fibrous, wispy, and diffuse.
A principal cloud type (cloud genus), appearing as a whitish veil, usually fibrous but sometimes smooth, that may totally cover the sky, and that often produces halo phenomena, either partial or complete.