Cloud microphysics addresses description of formation and evolution of cloud particles. In this paper we describe basic microphysical processes in the so-called warm clouds, i.e., those void of ice. Representation of microphysics in numerical models is challenging because of the myriad of cloud particles – in one cubic meter there is approximately 108 cloud particles. Their sizes and spatial distribution define cloud radiative properties, and therefore radiative budget; which is the main element governing climate. The latest way to report microphysics in numerical models is based on a so-called superdroplet method. In this paper the main assumption of this method is presented along with the argument that it is the most complex, up-to date cloud microphysics description.