This NSF Mid-scale Research Infrastruture-1 project is for the development of two mobile cloud and weather radars, known as the Ka-band Rapid-scan Volumetric Imaging Radars (KaRVIR). Ka-band refers to the short, millimeter-scale wavelength of the radar transmissions, which are ideal for observing small particles in the atmosphere. A primary use case for the radars will be for the remote sensing of cloud processes including the development of precipitation. Existing cloud radars only point vertically or have a slow scan rate for a full volume scan. KaRVIR will use phased array radar technology to provide a generational leap in measurement capability, completing a volume scan in less than 20 seconds. This will allow for the capture of quickly developing cloud processes which cannot be observed by any other means. The development will enable first-of-its-kind studies of cumulus cloud evolution, cloud and precipitation processes, atmospheric boundary layer structure, and wildfire studies, among many other topics. The development takes advantage of prior public and private sector investments in advanced wireless technology and addresses key NSF priorities regarding national defense, disaster response, and the Established Program to Stimulate Competitive Research (EPSCoR). Student training will take place at the intersection of atmospheric sciences and engineering. KaRVIR is a next generation phased array radar system for atmospheric and related sciences. The antenna ar