Question

What is the altitude at which rising air reaches the dew point temperature ?

Answer 1

see below

Explanation:

There is no exact altitude to reach the dew point temperatur. It depends (as you can sse on the diagram in figure) from the start point. If an air has 10 g of water in 1 kg of air (scale on the left) and it is at 30°C (scale on the bottom) it has the 38% of humidity (line green). If this air rise up, the temperature decreases (going to the left) of about 6°C every 1000 m till it meets the green line with the 100% of humidity (dew point temperature) at the temperature of about 14°C hence at about 2650 m up the precedent situation. You can make other examples like this

Answer 2

Lifted Condensation Level

Explanation:

The altitude at which rising air cools to and reaches the dew point is called the Lifted Condensation Level, or the LCL. This is the point where rising air starts to form clouds and is also the point where the cooling rate changes from the Dry Adiabatic Lapse Rate to the Saturated Adiabatic Lapse Rate. Please message me if you need more information about these terms.