| 摘要 |
Using conventional observation data and Guilin Doppler weather radar data, the atmospheric circulation situation, environmental conditions and mesoscale characteristics of convective storms during the severe convective weather process in Guilin, Guangxi on April 19, 2025 were analyzed in detail. The results showed that the severe convective process was dominated by short-term heavy rainfall, accompanied by thunderstorm and gale. This was a strong convective weather process in the warm region. On the south side of warm shear line, with the south branch fluctuation moving eastward, strong convection occurred near the surface convergence line. With the establishment of low-level jet at night, organized development of convection system was obtained. The environmental conditions showed unstable stratification, inversion layer, small convective effective potential energy, large K value and strong wind shear, and the inverted V-shaped structure was at low level. The convective storm that produced short-term heavy rainfall presented as low centroid precipitation echo. The mixed convection in Xinlong, Baishou, Yongfu was caused by heavy rainfall supercell and presented as high centroid precipitation echo, with weak echo area, bounded weak echo area and medium-intensity mesocyclone. |
