綏化市一次冷渦背景下的強對流天氣成因分析

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作者簡介 李瑩（1992—），女，黑龍江綏化人，工程師，主要從事天氣預(yù)報分析工作。

收稿日期 2023-08-21

Analysis of the Causes of Severe Convection Weather under the Background of A Cold Vortex in Suihua City

Li Ying et al（Suihua Meteorological Bureau， Suihua， Heilongjiang 152000）

Abstract Using conventional meteorological observation data， regional automatic station data， and radar data， the causes of severe convective weather in Suihua City on June 28， 2020 under the background of a cold vortex were analyzed. The conclusions were as follows： （1） The dry and cold air in front of the upper ridge and the warm and wet air in the lower layer form an unstable state， which is conducive to the occurrence of convection; （2） The low humidity in Suihua area is relatively high， and the easterly air flow strengthens the water vapor transport， which is conducive to the generation of wind and hail weather; （3） There is an obvious "horn" on the radiosonde map， and the convective effective potential energy， K index and Sand index all indicate that the atmosphere is unstable， which is conducive to the occurrence of hail; （4） The surface convergence line causes convergence uplift， triggering strong convective weather， forming convective system and cold pool at the front of the wet tongue， which is prone to wind and hail weather; （5） Strong basic reflectance corresponds to strong precipitation area， and "V" notch， vertical liquid water content area， and high overhanging strong echo center are the characteristics of hail.

Key words Cold vortex; Strong convection; Mesoscale;Radar echo

摘要 利用常規(guī)氣象觀測資料、區(qū)域自動站資料和雷達資料，分析2020年6月28日冷渦背景下綏化市出現(xiàn)的強對流天氣成因。（剩余3555字）