Cumulus Stage moist parcels lifted sufficiently high to cool to dew point creating shallow cumulus clouds entrainment of dry air acts against cloud development additional convection moistens the path, the cumulus cloud grows in height significant condensation releases enormous latent heat, powering the developing updraft cumulus cloud reaches an altitude where temperatures are significantly below zero (-15 degrees C or less), developing a mixed region of the cloud three-phase process works to create cloud particles large enough to fall through the updraft