The point where saturation begins in a rising air parcel is

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The lifting condensation level (LCL) is the point where saturation begins in a rising air parcel. At this point, the air temperature has cooled to the point where it reaches its dew point temperature and condensation occurs, leading to the formation of clouds. The dry adiabatic rate (DAR) and the moist adiabatic rate (MAR) are rates at which the temperature of a rising or sinking air parcel changes due to adiabatic heating or cooling, respectively. Cloud condensation nuclei are tiny particles in the air on which cloud droplets form.

The Point Where Saturation Begins in a Rising Air Parcel