Analysis of Three Tropical Cyclones with Similar Tracks but Different

TC precipitation prediction based on corresponding track-similar TC precipitation is one of operational TC precipitation forecasting methods. Typhoon Chebi(0102)，Toraji(0108) and a Tropical Depression have similar tracks and both brought about heavy rains in Zhejiang Province，but their precipitation intensity and distribution have different features. Based on the operational prediction，the detailed analyses were conducted on the atmospheric circulation features，physical quantity diagnoses and satellite images. It is found that the precipitation differences of the three tropical cyclones are mainly resulted from different atmospheric circulation backgrounds，environmental conditions of Zhejiang Province，the different intensity of TC，westerly trough，subtropical high over the Northwest Pacific Ocean and interactions between TC and westerly systems/subtropical systems. The conclusion is useful to operational TC precipitation prediction.

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