This study investigates the atmospheric mechanisms triggering flash-flood event in Thrace Basin of Turkey on November 27, 2018. Underestimation of this extreme precipitation amounts by NWP global and regional models (i.e. ECMWF, ALARO, WRF) and other meteorological difficulties (i.e. complex topography, land-sea interactions) in weather forecasting disabled disaster risk reduction before the event occurred. Detailed synoptic, thermodynamic, in-situ, and remote sensing analyzing results showed that significant amount of moisture during the afternoon times of the day was transferred to the atmosphere (from ground to 300-hPa) as a consequence of the excessive heating of sea surface temperatures (SSTs) of the Aegean Sea (16.5 °C in Ayvacik-Gulpinar place, 0.9 °C above its long-term normals). Strong southwesterly wind speeds associated with slow meridional movement of mid-latitude cyclone from its origin to the Eastern Mediterranean (EM) enabled transferring of relatively warm moist air to the land areas of Thrace Region (> 300 km fetch distance). Strong updraft and instability conditions under developed a supercell resulted with lightning (totally 63 cloud-to-ground and 59 intra cloud) and heavy rainfall especially Suloglu, Kofcaz, and Edirne settlements with the 12-hour total amounts 160.0, 123.0, and 97.4 mm (rainfall return period ~ 100 years), respectively. Flash-flood event caused numerous injuries and the death of a person and damaged, automobiles, houses, crops, and infrastructure of the Edirne and its neighboring settlements. From Showalter, K, Total of Totals, SWEAT, and CAPE instability indices; SWEAT is most appropriate to represent high possibility of occurrence of severe thunderstorms over the Edirne province owing to low-level moisture, warm air advection and low and mid-level wind speed terms in its equation.

中文翻译：

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与土耳其西北部山洪事件相关的大气过程的作用

本研究调查了 2018 年 11 月 27 日土耳其色雷斯盆地引发山洪暴发事件的大气机制。 , 海陆相互作用）在事件发生前无法降低灾害风险的天气预报。详细的天气、热力学、原位和遥感分析结果表明，由于海面过度加热，一天下午的大量水分被转移到大气中（从地面到 300 hPa）爱琴海的温度 (SST)（Ayvacik-Gulpinar 地区为 16.5 °C，比其长期正常值高 0.9 °C）。与从中纬度气旋从其起源到东地中海 (EM) 的缓慢经向运动相关的强烈西南风速能够将相对温暖的潮湿空气转移到色雷斯地区的陆地区域（> 300 公里的获取距离）。强上升气流和不稳定性条件下发达的超级单体导致闪电（总共 63 次云对地和 59 次云内）和强降雨，特别是 Suloglu、Kofcaz 和 Edirne 定居点，12 小时的总量为 160.0、123.0 和 97.4 毫米（降雨重现期〜100年），分别。山洪暴发造成多人受伤和死亡，并损坏了埃迪尔内及其邻近定居点的汽车、房屋、农作物和基础设施。来自 Showalter、K、Total of Totals、SWEAT 和 CAPE 不稳定性指数；