The name comes from oro-, which means mountain. When stable air is lifted, layered clouds usually result. B. When warm, unstable air is forced to rise over cooler air, towering clouds develop. CES1519 Classification of clouds according to height and form. The Bergeron process.
Ice crystals grow at the expense of cloud droplets until they are large enough to fall.
The size of these particles has been greatly exaggerated. The collision-coalescence process. Because large cloud droplets fall more rapidly than smaller droplets, they are able to sweep up the smaller ones in their path and grow. Most cloud droplets are so small that the motion of the air keeps them suspended. Even if these small cloud droplets were to fall, they would evaporate long before reaching the surface.