What is Convectional Precipitation?

Convectional rainfall occurs as a result of one of the three mechanisms that produce rain. When a fluid, such as air, is warmed from the bottom, for instance by earth warmed by sunlight, the lighter air rises drawing cooler air in underneath it. This sets up a so-called convectional flow. If the air near the ground is moist then when the it rises it will form clouds whose droplets coalesce to form convectional rain.