关键词: 雷暴, 时空分布, 环流形势, 东北冷涡, 河套低涡

Abstract: Based on the conventional meteorological data,the thunderstorm weather process in Jinzhou during the 2006-2013 years was analyzed in detail from two aspects of the temporal and spatial distribution and the circulation pattern. The results showed that the annual variation of thunderstorm days in Jinzhou had no obvious increasing or decreasing trend; The monthly distribution was unimodal,with the peak value in June,and there were 10.9 thunderstorm days on average per month; The diurnal variation of thunderstorm was very obvious,mostly from 11：00（noon） to 23：00（eve）; Affected by the cold vortex system,more than 2 consecutive days of thunderstorm accounted for 63.7% of the total; Area thunderstorm accounted for 55.0%,slightly more than the local thunderstorm; Thunderstorm first appeared in late February,the latest in mid November; Thunderstorms regional difference was not obvious. Large scale circulation background of thunderstorm in Jinzhou city was divided into cold vortex type and westerly trough type. The main difference between the two lies in the former was dominated by meridional circulation,affected by the northeast cold vortex or Hetao vortex,but the latter was dominated by zonal circulation. Cold vortex type was divided into cold（low） vortex directly influence type,bottom trough type and rear cross trough type. The direct influence type of the cold（low） vortex was characterized by the south of the vortex position and the thunderstorm occurring in the west airflow behind the vortex; But in the latter two types,the vortex position was northerly,and the short wave trough at the bottom or the cross trough back of the vortex swinging downward trigger thunderstorm weather,thunderstorm weather could occur in the southwest airflow in front of the trough or the northwest airflow behind the trough.

Key words: thunderstorm, temporal and spatial distribution, circulation situation, northeast cold vortex, Hetao vortex