The 29th Olympic Games which were held in Beijing from August 8 to 24 in 2008 were the largest ever Olympic Event in history. New and higher demands were proposed for weather services from a variety of competition events, activities related to the Olympic Games, the public daily life and the city operation during the Games. Also, the games occurred during the later half of summer when the risks of severe convective weathers such as heavy rainfall, thunderstorms, strong winds, hails, etc. appeared higher; timely weather forecast and warning to the development and evolution of these weather phenomena were a significant challenge for the international meteorological community. Therefore, to develop and apply the advanced short-term, nowcasting weather technique as well as its operational system for severe convective weathers became one of the key and most important tasks for Beijing Olympic weather services.