The Red-Sea Trough (RST) is a lower-level trough extending from the tropical low-pressure to the Levant. Its annual occurrence in the Levant is 20%, mostly in the autumn. It produces dry weather, but occasionally causing local showers and floods. During winter, the dominant synoptic system over the eastern Mediterranean is the Cyprus low (CL). Previous studies showed that some CLs form within pre-existing RSTs, through a tropical–extratropical interaction.

中文翻译：

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在红海槽内的东地中海上空形成气旋

红海槽（RST）是一个从热带低压延伸到黎凡特的低层槽。它在黎凡特的年发生率为 20%，主要发生在秋季。它产生干燥的天气，但偶尔会导致局部阵雨和洪水。在冬季，地中海东部的主要天气系统是塞浦路斯低压（CL）。先前的研究表明，通过热带-温带相互作用，一些 CL 在预先存在的 RST 中形成。