Abstract: The Sever Weather Alert and Track Comprehensive platform (SWATCH) is constructed by integrating the assignments and processes of meteorological operations, and the data processing and forecasting technology of the strong convective early-warning among the observatories at three levels of the province, cities and counties in Jiangsu. The SWATCH is demonstrated by the vital technology of alerting and tracking severe weather, such as application and display of multi-source observation data, objectively identification and extrapolation of severe convective weather, rapid production and real-time linkage among three-level earlywarnings in the province, cities, and counties. At the same time, SWATCH integrates the core products related to storm identification and extrapolation in PUP and SWAN which are commonly used in nowcasting. It is a breakthrough in the provincial-level operational platform that combines actual operational needs and operational scenarios in Jiangsu. Since 2015, SWATCH has become the main business platform for the strong convection weather warning at three-level meteorological stations in cities and counties in Jiangsu Province. And it has played an important role in operations on the early warning process of major sudden catastrophic weather, such as the Funing tornado on June Fig..