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A rainstorm weather event occurred from 1 to 3 September 2012 in Dali over the northwestern Yunnan Plateau is analyzed based on the new type detection data. The results indicate that during the rainfall, the cloud base height observed by a microwave radiometer always maintained under 1 km, and the larger the liquid water content was, the stronger the rainfall intensity was; air temperature appeared lager fluctuation; the small value area of relative humidity at upper levels corresponded well with heavy precipitation. During precipitation, the detection height from wind profile radar increased; the horizontal wind rotated clockwise from ground to top (warm advection), and the vertical wind speed was less than-4 m/s; the signal to noise ratio was greater than 40 dB, and there was a positive relationship between signal to noise ratio and rainfall intensity. The results are helpful to the monitoring and studies of rainfall weather in details.