Abstract: Based on recently modified tropical limited area numerical prediction model (TL10),test of short-term typhoon trace forecast for the South China ho area was implemented. Due to the sparsity of observation sites over oceanic regions,the initial typhoon circulation in analysis field is often nuclear and in the wrong location. We proposed a bogus scheme to represent typhoon circulation which is consistent with parameterization of physical processes in the model. By combining these synthetic observations with surrounding synopic obervation in the objective analysis step,the improvedinitial field is achieved. An of typhoon cases which landed on the coast of South China in 1993 are tested,and the results are competed with those from original numerical prediction system (TL6).