The very deep 1000‐500 hPa thickness cold pool which affected the UK and Ireland near the end of February 2018, advected the coldest air mass (in depth) into these islands since February 1991 (and the equal coldest since January 1987). This paper focuses on the first phase of the cold spell when snowfall was convective in origin. It was principally ‘Lake Effect’, i.e. associated with the inter‐action between deep, exceptionally cold air and relatively warm seas, enhanced and extended inland by coastal convergence and topography.The track of this cold pool was somewhat further north than in the record 1987 event with the heaviest snowfalls in 2018 occurring from around The Wash up to central Scotland.

中文翻译：

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2018年2月27日至3月1日的深冷池和湖效应降雪

极深的1000-500 hPa厚度的冷池在2018年2月下旬影响了英国和爱尔兰，使这些岛屿进入了自1991年2月以来最冷的空气质量（深度）（与1987年1月以来的最冷空气相同）。本文着重介绍降雪起源于对流的寒冷时期的第一阶段。它主要是“湖效应”，即与深冷异常的空气和相对温暖的海洋之间的相互作用有关，并通过沿海汇聚和地形增强和扩展了内陆。该冷池的轨迹比记录的更偏北1987年的降雪量最大，发生在2018年，从The Wash到苏格兰中部。