The second one was produced by a mesocyclone , which developed along the shear line, and the strong convergence.

第二阶段暴雨是由切变线上的强辐合及切变线上形成的边界层中尺度气旋造成的。

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The second one was produced by a mesocyclone , which developed along the shear line, and the strong convergence.

第二阶段暴雨是由切变线上的强辐合及切变线上形成的边界层中尺度气旋造成的。

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