The weather situation and the principles of snowfall estimation by using of Doppler radar data are introduced. The snowfall of a snowstorm weather process occurred in Shijiazhuang city from 10 to 12 November 2009 is computed based on the products of Doppler radar and the intensive snowfall observation by means of the Kalman filter method. The results indicate: (1) To use the Kalman filter method to estimate snowfall in this case is applicable, and the results are satisfactory, especially for the heavy snow of over 2 mm per hour. (2) The selection of elevations in estimating snowfall using the Kalman filter is based on the geographical features, the products of the radar reflectivity factor and echo tops, which is different from rainfall estimation. Both products of Doppler radar data and intensive snowfall observation data are useful in estimating the distribution of snowfall.