Summary: The study reports on the experience of the first two years of the "Bács-Kiskun County Hail-preventing Unit with Rockets", established making use of the experience of south Baranya hail-preventing system of experimental character and operating since 1984. It deals with the aspects of the selection of the protected area's climatic conditions, the frequency and regional distribution of hails, the structure of the Hail-preventing Unit, the method of hail-supression, and its practice in the Unit.