What are the causes of convective rain?

1. Convective rain is a precipitation phenomenon caused by atmospheric convection. Its formation mechanism is that the air near the surface layer is heated or the air at high altitude is strongly cooled, which leads to the rise of the lower air and the condensation of water vapor, thus forming convective rain. Before the arrival of convective rain, there are often strong winds, which can pull up trees with a diameter of 50 cm, accompanied by lightning and thunder, and sometimes hail.

2. Convective rain mainly occurs in cumulonimbus clouds, where ice crystals and water droplets exist. The vertical thickness and water vapor content of the cloud are particularly large, and the airflow fluctuates strongly, reaching 20 ~ 30m/s, and the cloud is charged. Therefore, cumulonimbus clouds often develop into strong convective weather and produce heavy rain. Lightning strikes, strong winds and heavy rains often occur in such thunderstorms.

Pale cumulus clouds are thin and have low water content, so rain usually falls to the ground. Cumulus seldom rains in the middle and high latitudes, but in the low latitudes, it can sometimes produce precipitation because of its rich water content and strong convection.