The Summarization of the squall on June 3 in 2009 in Henan and Anhui Province

By using the observation data, satellite data, lightening data and radar data etc., the severe squall line which occurred on Jun 3 in 2009 in Henan, Anhui and Jiangsu is analyzed. Results demonstrate that under the favorable cold vortex in North east of china, the outflow verge of thunderstorm formed by thermal convection in the afternoon and convergence line at the surface cause the mesoscale severe squall line in south of Shanxi and Henan province. The squall line followed by gale, hail etc. cause the casualty of people and loss of belongings.