Abstract: A strong convective process involved an extensive area covering Zhaoqing, Foshan, Shunde, Nanhai, Panyu, Zhongshan and many other cities form 13 : 00 to 21 : 00 on 19 April 1995. The whole process was observed and complete radar data were obtained in Guangzhou Radar Observatory. The detailed analysis was made for the tornadic storm over Wanqingsha area. The results show that: (1) it is a rare anticyclonic tornado, (2) its scale belongs to the range of micro-small scale (1200 ~ 4000 m), (3) the life time of the accompanied storm cell is as long as 4~5 h, and (4) the calculated parameters such as tornado strength and tornado circulation are in the same order as those of Dellas, Fargo, et al