The heavy typhoon-rain with a very long land track

In this paper, it is analysed that the whole heavy rainfall process caused by Typhoon Freda which covers a very long distance route (near by 3500km) over the East Asia contienent in 1984. It is indicated that such a heavy typhoon-rain with a very long land track experiences the tropic, semi-tropic and ertratropic stages . The characteristics of the heavy rainstorm processes and constructions of the systems in the three stages are studied. Comparing with that the similar rainstorm occurring over the North America contienent, the differences are discussed. The results are used to correct the typical synoptic model and could be considered as the reference for the forecasting of heavy rainfall effected by typhoon over the East Asia.

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