辽源地区一场特大暴雪天气过程形势分析

Analysis on Weather Process Situation of Severe Heavy Snow in Liaoyuan Area

2007年3714～5日，辽源出现了一场自1957年有气象记录以来最大的一次暴雪天气过程。通过对该天气过程形势进行分析，探讨了特大暴雪的成因。结果表明：这次天气过程是在极为有利的环流背景下，贝加尔湖到日本海之间“Ω”型高压坝的阻挡、西南涡与河套倒槽的合并加强对暴雪的形成和维持起到了重要作用。

The most severe heavy snow happened on 4 - 5 March 2007 in Liaoyuan, which was the greatest in the weather record from 1957. Based on analyzing the clause of the severe heavy snow on weather process situation. The results showed that the influence of advantageous eircumfluence, the obstruct from high air pressure dame of ＂Ω＂, and the merging and strengthening of the southwest vortex and Hetao anti - air reservoir, all of them contribute the form and maintain of severe heavy snow.