* ''Noctilucente'': velos tipo I<ref name="veils">{{cite web |editor=World Meteorological Organization |title=Type I Veils, International Cloud Atlas |year=2017 |url=https://cloudatlas.wmo.int/noctilucent-clouds-type-I-veils.html|accessdate=18 Julyde julio de 2019}}</ref>, bandas tipo II<ref name="bands">{{cite web |editor=World Meteorological Organization |title=Type II Bands, International Cloud Atlas |year=2017 |url=https://cloudatlas.wmo.int/noctilucent-clouds-type-II-bands.html|accessdate=18 Julyde julio de 2019}}</ref>, ondas tipo III<ref name="billows">{{cite web |editor=World Meteorological Organization |title=Type III Billows, International Cloud Atlas |year=2017 |url=https://cloudatlas.wmo.int/noctilucent-clouds-type-III-billows.html|accessdate=18 Julyde julio de 2019}}</ref> y remolinos de nubes tipo IV.<ref name="whirls">{{cite web |editor=World Meteorological Organization |title=Type IV Whirls, International Cloud Atlas |year=2017 |url=https://cloudatlas.wmo.int/noctilucent-clouds-type-IV-whirls.html|accessdate=18 Julyde julio de 2019}}</ref>
