An analysis of a heavy rainfall event on 2 June 2008 in Dali, Yunnan Province, is made with wind profiler radar products and hourly rainfall data. The results show that the event is characterized with apparent mesoscale features; the vertical structure can be clearly revealed by the horizontal wind profiler products; the downward disturbance at the upper atmosphere is closely related with the enhancement of rainfall; the products of wind profiler radar (such as vertical velocity, refractivity structure constant, signal to noise ratio) can be used to determine the beginning, ending and intensity of rainfall.