An Analysis of Heavy Torrential Rain Generated by Southwest China Vortex in Hangjahu Area

The process of heavy torrentail rain in 13 August 1997 was analysed. The results revealed various features of enviromental physics field before heavy torrential rain appearance. It is found that the strong gradient of physics field has an important effect both on the occurrence and the development of heavy torrential rain,it also provides the evidence to the forecasts of the rainfall area about the formation,the development and the movement of the strong gradient belt of physics field.

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