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WHY WHEN THE WATER VAPOUR RISES,THE CLOUDS STARTS COOLING?

The warmer the air is, the more water vapour it can hold. Clouds are usually produced through condensation - as the air rises, it will cool and reducing the temperature of the air decreases its ability to hold water vapour so that condensation occurs.As the parcel rises, its humidity increases until it reaches 100%. When this occurs, cloud droplets begin forming as the excess water vapor condenses on the largest aerosol particles. Above this point the cloud droplets grow by condensation in the rising air.The upward motions that generate clouds and lead to precipitation can be produced by convection in unstable air, convergence of air near cloud base, lifting of air by fronts and lifting over elevated topography such as mountains.


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