https://www.cirrostratus.fi/
Cirrostratus Oy
cirrostratusoy
https://cloudatlas.wmo.int/en/species-cirrostratus-nebulosus-cs-neb.html
Cirrostratus nebulosus (Cs neb) | International Cloud Atlas
A nebulous veil of Cirrostratus with no distinct detail. Sometimes the veil is so light that it is barely visible; it may also be relatively dense and easily...
international cloudcirrostratuscsnebatlas