Abstract: the forecast of heavy rain induced by vortex is not only determined by the vortex movement track, but also closely related to its structure and revolution.

摘要对西南涡暴雨的预报不仅取决于对西南涡移动路径的把握，也与西南涡的结构及其演变密切相关。

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As a result, since 2005 the website has called for rain when there is no measurable downpour less than one-hundredth of an inch nearly twice as often as it has shown no rain in its icons before rain occurs, according to the website Forecast Advisor, which tracks weather forecasts.

WSJ: Some Percentages Are Just Fair-Weather Friends