沈阳“06．2”暴雪天气过程诊断分析

本文针对2006年2月24日到25日沈阳地区出现的暴雪天气进行了天气诊断分析，发现本次暴雪是在高空横槽转竖、低空锋区扰动、地面倒槽发展东移北上这样几个高低空系统相互作用的结果。水汽条件、垂直速度场和K指数等多个物理量场的条件分析，发现本次暴雪出现在强烈上升的饱和湿区和K指数大值区之中。通过卫星云图图像分析，再现本次暴雪过程的表象特征。同时通过实况天气图与日本气象厅的预报传真图之间的对比，肯定了数值预报产品在实际预报工作中的重要参考作用。

DIAGNOSTIC ANALYSIS OF HEAVY-SNOW DURING FEBRUARY 2006 IN SHENYANG

Analyzing the weather process of heavy snow from February 20 to 25,2006 happened in Shenyang region showed that heavy snow event resulted from upper transversal trough turning to vertical, lower frontal zone disturbance,ground inverse trough developed and moved eastward to the north . After analyzing transportation of water vapor, distribution of vertical velocity and K index, we found that this snow process was in the area of strong ascending motion with moist air and big K index. According to the analyzing by satellite cloud picture,the feature was described again by the cloud evolvement. By means of comparison of numerical forecasting of Japan Meteorological Office with real weather map, we found that the numerical forecast has important reference value for the forecast work.