Current projects are advancing our understanding of 1) the microphysical structure of snow bands in winter cyclones; 2) the role of cloud microphysical processes in mesoscale convective systems (MCSs) and storms; 3) the properties of tropical clouds (habits, sizes and phases of cloud particles) generated by deep convection; 4) the role of cloud microphysical processes in the rapid intensification of tropical cyclones; 5) processes controlling the amount of supercooled water and freezing drizzle in clouds; 6) how aerosols and other processes affect the evolution of clouds in the Arctic and over the Southern Oceans; 7) the transmission of radiation through the cloudy atmosphere; 8) the representation of clouds in climate and weather models, and especially the development of a stochastic framework for representing cloud processes; 9) the impact of anthropogenic aerosol particles on the water and energy bugets of clouds; 9) the impact of biomass burning aerosols on cloud properties; 10) the retrieval of cloud properties from space-, air- and ground-based remote sensors; 11) the evolution of warm rain; and 12) the use of air- and ship-based instrumentation for measuring the properties of clouds.