Analysis of the 19 September 2023 EF3 Tornado in Funing,Jiangsu,and Multi-Band Radar Monitoring and Early Warning TechniquesⅡ:Multi-Band Radar Feature and Early Warning
LIU Jun
ZHOU Honggen
XIA Yuchen
XU Fen
ZHANG Xinghai
SHI Zhao
ZHOU Zhixi
Abstract：To explore the value of adaptive cooperative observations from multi-band radar in capturing tornado features and improving operational warnings,and to construct a tornado warning index for operational reference,this study analyzes the rare EF3-level tornado case on 19 September 2023 in Funing,Jiangsu,which is a rare tornado event for September in the history of Jiangsu.The analysis is conducted from the multi-band radar echo characteristics,tornado nowcasting,and early warning verification.The key findings are as follows.(1)The S-band and X-band weather radars cooperate to provide meso-and micro-scale features of the tornado and its parent storm.Funing EF3-Level tornado convection pattern conforms to the tornadic supercell conceptual model and the mature mesocyclone conceptual model,exhibiting mesoscale features such as Tornado Vortex Signature(TVS),Tornadic Debris Signature(TDS),Zdr arc,Kdp arc,Zdr column,Kdp column,CC column,W column,and Reflectivity Core(RC).(2)Both the multi-band radar TDS,which is associated with strong updrafts,and the mesocyclone,which is directly linked to the tornado,can be used for tornado targeted warning.The lead warning time of Funing tornado using TDS is 13 min and 33 min,while the lead warning time of Funing tornado using mesocyclone is 19 min and 39 min.In addition,the height of TDS offers a certain indication of the intensity and maintenance of the tornado.(3)According to early warning test of Jianhu EF1-level tornado on 19 September,the combined warning of multi-band radar TDS and mesocyclonic characteristics reached a lead time of 15 min.These findings provide a reference for the multi-band weather radar monitoring and warning of tornadoes in Jiangsu.
Keywords："9.19"Funing tornadoEF3-levelmulti-band radartornado characteristicstornado warning
Publication Date：2025-12-31
Online Publishing Date：2026-01-12(First online date of this platform, not the publication date of the document)
Pages：13( 820-832 )