english: It's composed entirely of ice crystals cascading from the upper reaches of the troposphere, and as these ice crystals fall, they pass through different layers with different winds and they speed up and slow down, giving the cloud these brush-stroked appearances, these brush-stroke forms known as fall streaks.
non_english: Sastoji se uglavnom od ledenih kristala koji se stepenasto spuštaju iz gornjih delova troposfere i dok kristali padaju, prolaze kroz različite slojeve, sa raznim vetrovima ubrzavaju se i usporavaju, dajući ovim oblacima izgled kao da su potezi urađeni četkom, ovi potezi se nazivaju padajući pramenovi.