Back قاعدة السحاب Arabic Kondensationsniveau German Base de la nube Spanish کف ابر Persian Base d'un nuage French Base della nube Italian 雲底 Japanese Debesies pagrindas Lithuanian Wolkenbasis Dutch Skybase NN
A cloud base (or the base of the cloud) is the lowest altitude of the visible portion of a cloud. It is traditionally expressed either in metres or feet above mean sea level or above a planetary surface, or as the pressure level corresponding to this altitude in hectopascals (hPa, equivalent to the millibar).