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affected by typhoon prasang,this evening, many places in the main urban area, linping, yuhang and xiaoshan also issued yellow warnings for thunderstorms. yuhang issued a yellow warning for heavy rain.

hangzhou meteorological observatory issued a yellow warning signal for minefire at 17:10 on september 20, 2024:affected by convective clouds, thunderstorms are expected to occur in most streets of upper city, gongshu district, xihu district and binjiang district this evening. please take precautions against the adverse effects of thunderstorms and try to avoid outdoor activities.

photo by chen zhongqiu

photo by yu qing

many orange friends felt the thunder:

a tornado suddenly appeared in shanghai?

affected by the residual circulation at the tail end of typhoon no. 14 "prasang", heavy rains fell in many places including the central urban area of ​​shanghai, jinshan, songjiang, fengxian, minhang, and central and northern pudong.due to heavy rainfall in a short period of time, roads in some parts of shanghai were flooded, and the shanghai metro swimming pool station almost turned into a swimming pool.

according to shanghai weather analysis, although the center of "prasang" has moved into jiangyin, jiangsu, shanghai is located on the right rear side of the cyclone and is experiencing a train effect. water vapor from the sea continues to gather and then rises after landing, and precipitation continues.

this afternoon, typhoon prasang caused trouble again. many weather enthusiasts reported that a tornado was suspected to have occurred in qingpu, shanghai.

the qingpu district meteorological observatory in shanghai has updated the yellow warning signal for strong winds to the orange warning signal for strong winds at 15:50:affected by thunderstorm clouds, strong northerly winds with gusts of more than level 12 are predicted in parts of qingpu district in the next 6 hours. tornadoes may occur locally. strong winds will have a serious impact on outdoor operations, transportation, facility agriculture, projects under construction, water operations, etc. the risk of disasters is very high, so please strengthen precautions.

after checking the radar echo at that time, the science blogger "weather enthusiast" found that there was a suspected development of purple echo in the local area. combined with the flat terrain of shanghai and the strong convective movement on the southeast side of prasang, it was analyzed that a tornado was indeed possible.

another popular science blogger, "chinese weather enthusiasts", also posted that a supercell and a tornado appeared in western shanghai. as the center of typhoon prasang turned around and moved eastward in jiangsu, the strong convective clouds on its tail also returned and swept across shanghai again. in the convective clouds in western shanghai, a supercell dropped a tornado when passing through qingpu district. according to the video shot by local citizens, the structure of the funnel cloud is clear and there are debris clouds on the ground, which can be confirmed to be a typical tornado.

judging from the probability forecast map of the path of "prasang" released by the central meteorological observatory, its center has really made a big turn and is heading towards the southern coast of south korea.

according to the city's meteorological station's previous analysis, it was originally predicted that the subtropical high pressure would push typhoon prasang to move northwestward, deep into the inland of jiangsu, and even possibly reach the vicinity of nanjing. now that the typhoon has turned ahead of schedule, it means that the subtropical high pressure, which has been strong for nearly three months, has finally begun to show signs of fatigue. the subtropical high pressure has weakened in intensity and its sphere of influence has shrunk. the typhoon's early turn has also caused a major change in the weather situation.

song yun, reporter of chengshi interactive and metropolis express