Abstract
Using the relay computer, numerical predictions of the typhoon movement are performed by the barotropic model successively with many time steps of small time interval. In the problems of the typhoon prediction, the large truncation errors especially near the typhoon center seriously affect the forecast of typhoon movement. So, in this paper, to reduce such truncation errors, a certain smoothing procedure is taken, and the barotropic forecast is applied to the smoothing map at 700 mb and 500 mb level.
