黑龙江省一次局地暴雪过程诊断分析

Diagnosis and analysis of a local blizzard in Heilongjiang

本文利用常规气象资料、NCEP逐6 h再分析资料,对2017年11月13-14日黑龙江省东部出现的暴雪过程进行天气形势分析及物理量场特征诊断。结果表明:此次降雪过程,受冷涡东移影响,地面气旋加强,中低层存在明显的冷暖锋区。850 h Pa暖舌北伸,系统锢囚。黑龙江省东南部处于急流轴的左侧,有利于暴雪的产生。降雪量大值区处于垂直速度大值区和假相当位温密集带。散度场也能很好的反应出暴雪落区。

The weather situation analysis and the physical quantity field diagnosis of snowstorms occurred in the eastern part of Heilongjiang province from November 13 th to 14 th, 2017 were performed using conventional meteorological data and NCEP reanalysis data on a 6-hour basis. The results show that the snowfall process was affected by the cold vortex eastward, the surface cyclones strengthened, and there were obvious cold and warm front areas in the middle and lower layers. Warm tongue in 850 h Pa layer stretched north, the system was in prison.The southeastern part of the province is on the left side of the jet stream, which is conducive to the creation of Blizzard. The large area of snowfall is in the vertical velocity large value zone and the false equivalent temperature intensive zone. The divergence field also responds well to the blizzard.