Based on the conventional observation data,wind profile radar data and Doppler ra-dar data,the two typical stationary front thunderstorm events on August 13-14,2019 and June 13-14,2020 are compared and analyzed.The two weather processes are the northwest air flow behind the 500 hPa trough and the south pressure of the 700 HPA shear line.The difference is that the 700hPa field on August 13-14,2019 is in front of the central Yunnan trough and on the process of June 13-14,2020,the southeast air flow is controlled by the southwest side of the Western Pacific subtropical high.The difference between the two also leads to different flight impact.For the first time,the front passed through the northeast,causing the thunderstorm in this field and the extended line of the final succes-sively.The second is that after the passing of the front,the extended line of the final was covered by thunderstorms for a long time,and then with the northward movement of the front,and the thunder-storm was caused.The two main influence periods are the small peak of night shift from 0 to 2 o'clock.Wind profile radar data can play an important role in the decision-making of the advance and retreat auxiliary forecast of the judgement system.
关键词
静止锋雷暴/风廓线雷达/多普勒雷达
Key words
Stationary front thunderstorm/Wind profile radar/Doppler Radar
维普
万方数据