* The author is part of the community of readers of La Vanguardia

In these images in Las Fotos de los Lectores de La Vanguardia, captured in Manlleu (Osona), we can see how cumulus clouds develop. Clouds of evolution that we can appreciate in detail thanks to this accelerated video.

We speak of “evolution clouds” precisely because they evolve as the day progresses. To do this, they include the heat and humidity present in the lower layers of the atmosphere.

Evolution clouds are always formed by updrafts of warm, moist air, which is called convection.

Convection in the Earth’s atmosphere involves the transfer of enormous amounts of heat absorbed by water. It forms clouds of great vertical development (for example, cumulus congestus and, above all, cumulonimbus, which are the types of clouds that reach greater vertical development). These clouds are the typical carriers of thunderstorms and heavy rainfall.

Convection is a phenomenon by which a mass of warm air is transported from the lower layers to the upper layers of the atmosphere.