Based on the stability classification, if, over the airport, rising air reaches the point of saturation below 3000 m, it is likely that:

It is likely that vertically developed cumuliform clouds would begin to form

Explanation:

This is because since the air is conditionally unstable below 3000mand air were to be forced to rise to a point of saturation within this particular layer of the atmosphere

hi there!

your question asks at which segment does freezing occur.

since we're talking about water, the freezing point of water will be 32 degrees fahrenheit or below.

hope this ! ~