Based on the reanalysis data of ZJ-WARMS with three hours interval,conventional sounding data and Lin'an Dual-polarization Radar data products,the typical features of the first snowfall in Zhejiang area on Dec.5,2015 are studied.It is showed that the high temperature near surface and low temperature in middle and low levels,combined with the mountainous topography in the northwest region of Zhejiang province are the main causes.The typical characteristics of dual-polarization radar products on this type of snowfall in Zhejiang area are summarized,and the threshold value of discrimination is obtained consequently,with the purpose to improve the predictability of this kind of snowfall.