Abstract:Based on Guangdong meteorological disaster archives, ERA5 reanalysis data and Doppler radar data, the spatiotemporal distribution, weather background and parent storm patterns of Guangdong tornadoes during 1961-2022 are analyzed, results are as follows:In the past 62 years, Guangdong has recorded a total of 225 tornadoes. Among them, since 2006, when multiple sources of observation data are relatively complete, about 6 tornadoes have occurred annually, about 50% of tornadoes occur in the background of tropical cyclone weather, followed by 40% of tornadoes in the Westerlies weather system, but the number of tornadoes fluctuates greatly year by year, up to 17 (2008), and only one tornado or no tornado record in some years. Tornadoes mainly occur from April to September, with 54% occurring from April to June, mostly in the context of the westerly weather system, and 34% occurring from July to September, mainly in the context of tropical cyclones and disturbances. More than 85% of tornadoes occur between 0800-2000 BJT (Beijing Time, the same below), with the highest occurrence occurring between 1400-1800 BJT (accounting for about 40%). Tornadoes occur most frequently in the Pearl River Delta, Leizhou Peninsula and Chaoshan Plain. There are few tornadoes in the northern mountainous areas. Foshan, Zhanjiang and Guangzhou are the cities with the highest incidence of tornadoes. Among the convection patterns that generate tornadoes in Guangdong, more than 50% of tornadoes are generated from miniature supercells embedded in the zonal convective system, and about 30% of tornadoes are generated from supercell in the multicells storm system. Different from the situation that isolated convection cell in the United States are more likely to generate tornadoes, the relative frequency of isolated convection cell that generate tornadoes in Guangdong is very low, accounting for about 5%. More than 90% of tornado parent storms have low-level mesocyclone, but only about 44% of tornado parent storms are accompanied by low-level TVS. Strong tornadoes (EF2+) are typically characterized by low-level mesocyclones with rotational speeds exceeding 20 m·s-1 and TVS velocity differences exceeding 40 m·s-1 .