Q vector convergence band has indicative significance for the heavy rain. Specially, Q vector analysis is more beneficial when the weather influence system is not obvious.
矢量辐合带对暴雨有指示意义，尤其是在天气影响系统不明显的情况下，进行Q矢量分析更为有益。
The analysis shows that conditional symmetric instability might be the unstable mechanism responsible for the heavy rain event.
分析表明：条件性对称不稳定是这次强降水发生的不稳定机制之一。
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