Hail is regularly observed in Belgium and is sometimes the cause of severe damage on e.g. crops, greenhouses, roofs and cars. Most severe hail events occur in summer and are associated with intense thunderstorms producing large hail stones. Hail is a very local phenomenon, in time and space, which can not be easily detected with ground observational networks. Due to its wide spatial coverage and relatively fine spatial and time resolution, weather radar appears as a valuable tool for the real-time detection of hail.