It may be noted that the only process capable of bringing about cloudy condensation and the resultant precipitation from extensive air masses is the adiabatic cooling. But at the same time it is equally true that not all condensation, even in the ascending currents of air, is followed immediately by precipitation.
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Even though all clouds contain water, some produce precipitation while others do not. In certain cases precipitated moisture does fall from the clouds, but it gets evaporated in the atmosphere before actually reaching the earth’s surface.
Only when the cloud droplets, ice pellets or ice crystals grow to such a large size as to overcome the normal buoyancy and updrafts in the atmosphere does precipitation occur. It means that some special processes must operate in a cloud from which precipitation falls.