Based on the satellite images and synoptic charts and the radar(CINRAAD/CC) data of a heavy snow in southwestern of Hei Longjiang Province on December 12, 2001 ,the snowing weather process is analyzed. The result shows that the characteristics, such as the inhomogeneity of reflectivity, low level jet in speed field and two layer structure in height field can be obtained with the new generation weather radar ,as well as the difference of radar echoes of snow and rain is compared.