Fig. 1. Vertical profile of relative humidity in Wuhu area at 14:00 on July 19, 2021

Fig. 2. The ground wind field of the encrypted automatic weather station in Anhui Province at 15:00 (a), 16:00 (b) and 17:00 (c) on July 19, 2021

Fig. 3. The reflectivity factor at 2.5° elevation of Wuhu doppler weather radar at 15:12 (a), 15:42 (b), 16:47 (c), and 17:15 (d) on July 19, 2021

Fig. 4. Radial velocity map of doppler weather radar with 2.5° elevation at Wuhu station at 16:03 (a) and 16:30 (b) on July 19, 2021

Fig. 5. Vertical structure diagram of thunderstorm outflow boundary and gust front^[6,7]

Fig. 6. Horizontal wind profile (a) and vertical velocity profile of airflow (b) at 2-min interval at Wuhu station from 16:00 to 17:00 on July 19, 2021

Fig. 7. Horizontal wind profile (a) and vertical velocity profile of airflow (b) at 2-min interval at Wuhu station from 17:00 to 18:00 on July 19, 2021

Fig. 8. Profile of radar horizontal SNR at 2-min interval at Wuhu station from 17:00 to 18:00 on July 19, 2021

Fig. 9. Variation of SRH and precipitation (10-min interval) at Wuhu station from 15:00 to 18:00 on July 19, 2021