Application of A Step-by-step Approximation Method in Forecasting Tropical Storm's Motion

By comparing experimental results of a step-by-step approximation method with tropical storm forecasts issued by other weather services in China and some international services, and with experimental outputs from some domestic objective forecasting methods during tropical storms season in 1995,it is pointed out that the step-by-step approximation method has good ability in forecasting recurvature of tropical storm's track. The 48 hours mean distance error of the results was less than 300km. The method has more advantages than other objective forecasting methods especially when a tropical storm changed its motion speed markedly.

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