Description & Characteristics. Cirrocumulus clouds are thin cloud patches found high in the troposphere and are the only cloud found here that has cloud heap characteristics. Because cirrocumulus clouds are so high in altitude, the cloud heaps take on what can be described as a ‘grain of rice’ appearance. Take note when you see them because along with cumulonimbus, cirrocumulus clouds are the least seen among the ten main cloud types.
Unlike cirrus and cirrostratus clouds, cirrocumulus clouds don’t typically produce sun halos, though they are capable of iridescence and coronas on the rare occasion. Additionally, these are the only clouds in the high level that cannot be found in the fibrous form.
If you see a cirrocumulus cloud, the chances are good that there are cirrus and/or cirrostratus clouds nearby or even adjacent. Similar to altocumulus clouds, cirrocumulus can also take on a mackerel sky effect, resembling fish scales. If you’re lucky enough to see a mackerel sky at sunset, you’re in for a treat.