Using the data of encrypted automatic station,sounding,weather radar and so on,16 thunderstorm gales were studied in Dalian area from May to September during 2011-2016. The characteristics of sounding,radar echo evolution and radar product identification index were analyzed before thunderstorm gale. The results showed that the thunderstorm gales were divided into three types: the low-elevation radial velocity high value region,the haplotype and the arcuate type according to the radar echo evolution. The low...