At these heights, the atmosphere is cold enough that clouds are typically composed of ice crystals, not water droplets. These clouds often look thin, wispy, and delicate—but they can provide valuable ...

IN 1933 Bergeron1 postulated that rain falls only from clouds which contain both water drops and ice crystals. Natural cumulus clouds at temperatures above -13° C. often contain only supercooled ...

Cumulus Global, one of the original Google ... which he described as a "pretty poor" attempt at cloud because of functionality shortcomings and continuous compatibility issues.