Abstract:A tornado process occurring in Foshan, Guangdong, May 7th, 2011, was analyzed using the conventional observation data,NCEP 1o×1o reanalysis data and the data from the Doppler weather radar set up in Guangzhou. The results indicated that this tornado formed in favorable weather conditions, including high atmospheric instability, abundant moisture, strong vertical wind shear, and low lifting concentration level in the ambient environment. The convergence of multiple storm cells intensified the convection and induced the tornado. The echo pattern in reflectivity data revealed classical supercell structure, obvious hook echo, and the presence of Bounded Weak Echo Region in the reflectivity profile. The mesocyclone formed in hook echo and lasted for a duration of three times of volume scanning. The mesocyclone was strong and gradually developed to low-level mesocyclone. Tornado Vortex Signature occurred 10 minutes in advance of the tornado. Two adjacent pixels in the direction of azimuth angle in the radial velocity map exhibited strong wind shear at an angle of 0.5 degree (500m above the ground), indicating that funnel cloud had extended below the parent supercell storms. Ten minutes of pre-warning time can be achieved through a comprehensive analysis of the data from radar products.