The identificationof a flash heavy rain event relies on two factors: the rainfall rate and the duration of rainfall.

短时强降水事件的识别主要由雨强和降水持续时间两个要素确定。

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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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Last year's event was marred by heavy rain, which turned many car parks into mud baths with some festival-goers forced to sleep in their cars as traffic became gridlocked.

BBC: Paul Weller to play Isle of Wight Festival 2013

Organisers feared the event would have to be cancelled because of heavy rain and fog, but the 160 competitors carried on.

BBC: Charity bikers defeat weather

Organisers of a Surrey music festival have said they are confident the event will not be disrupted by wet weather, despite a forecast of heavy rain.

BBC: Olly Murs