canal cloud

English - English

Definition of canal cloud in English English dictionary

(Meteoroloji) A fallstreak hole (also: hole punch cloud, punch hole cloud, canal cloud) is a large circular gap that can appear in cirrocumulus or altocumulus clouds. Such holes are formed when the water temperature in the clouds is below freezing but the water has not frozen yet due to the lack of ice nucleation particles. When a portion of the water does start to freeze it will set off a domino effect, due to the Bergeron process, causing the water vapor around it to freeze and fall to the earth as well. This leaves a large, often circular, hole in the cloud

Hyphenation

ca·nal cloud

Turkish pronunciation

kınäl klaud

Pronunciation

/kəˈnal ˈkloud/ /kəˈnæl ˈklaʊd/