Definition
The altitude at which a parcel of surface air, warmed by solar heating and rising through convection, cools enough for its water vapor to condense and form the base of cumulus clouds.
Plain English
The height where rising warm air from the ground cools just enough for moisture in it to turn into visible cloud, forming the flat bottoms of fair-weather and thunderstorm clouds.
Context Anchor
Seen in aviation weather study, weather briefings, and discussions of cumulus cloud bases caused by daytime heating.
Derivation
Convective comes from Latin convehere, meaning 'to carry together' — referring to air being carried upward by heating. Condensation is the change of water vapor into liquid droplets. Together, the term names the level where convective lifting produces condensation.
Why Pilots Care
The CCL shows the expected base height of convective clouds and helps anticipate turbulence, visibility changes, and possible thunderstorm growth.
Grounding Statement
On a warm afternoon, watch the flat bottoms of all the puffy cumulus clouds line up at roughly the same height — that height is the convective condensation level.
Intuition Check
Do not read “convective” as meaning any cloud or any condensation. Here it specifically means condensation caused by air rising from surface heating.
Example Sentence 1
With strong surface heating forecast, the convective condensation level was expected near 4,500 feet, matching the bases of the building cumulus by midafternoon.
Example Sentence 2
Before departure the crew checked the CCL to judge whether the cloud bases would stay high enough for comfortable VFR flight.