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the center of this year's 13th typhoon "bebejia" (strong typhoon level) made landfall in lingang new city, pudong, shanghai around 7:30 am today (september 16). the maximum wind speed near the center was 14 (42 meters/second) when it landed. it is the strongest typhoon to land in shanghai since 1949.

the shanghai meteorological bureau said that although "bebejia" has made landfall, the period of the strongest wind and rain impact in shanghai has not yet ended.

typhoon bebejia's path forecast. screenshot of shanghai weather app

during the day, under the influence of the typhoon, shanghai will be cloudy with showers or thunderstorms, with accumulated rainfall reaching torrential rain, and heavy rainstorms in some areas. from this evening to the first half of the night, the wind and rain will gradually weaken, turning to cloudy to overcast with occasional showers. as the typhoon moves westward, the wind direction will change significantly, from northeasterly wind to southeasterly wind, with strong winds during the day and gradually weakening after the evening. the temperature difference throughout the day is small, between 28℃ and 30℃. although the wind is strong and the temperature is not high, the humidity is high and the air pressure is low, so the body will not feel very comfortable.

some netizens in some areas said that the wind and rain did not seem to be too strong, and it was even very calm? meteorological experts said that there would be a brief calm in the eye of the typhoon or the gap between the spiral clouds, and then strong winds and rain would strike again. the danger has not been lifted, and we should not relax our vigilance. it is recommended to continue to wait at home for the typhoon to completely end.

in the horizontal direction, the structure of a typhoon can be divided into three parts from the center to the periphery: typhoon eye (center), typhoon eyewall/cloud wall (main body), and spiral cloud and rain belt (periphery).

the area where the eye of a typhoon passes is often calm, which makes people mistakenly believe that the typhoon has passed. in fact, it is right in the eye of the typhoon. the calmer it is, the stronger the typhoon is.

the typhoon eyewall or typhoon cloud wall is one of the main areas causing typhoon rainstorms. tornadoes, lightning, thunderstorms and sometimes hail can also occur in the eyewall area.

the typhoon spiral rain belt is located immediately outside the typhoon eyewall, with a wide range and various forms. the areas affected by the spiral rain belt are often accompanied by showers and gusty winds, and the rainfall intensity and time vary with the development range and intensity of the rain belt.

china weather network said that at present, the convection in the eye wall area on the east side of "bebejia" is more vigorous, and the wind and rain are stronger. this will also be where the strongest wind and rain will appear. it is expected that some areas of shanghai where the center of the typhoon passes today will have strong winds of level 13 or above.

as the center of the typhoon continues to move westward, more places in shanghai will enter the eye of the typhoon, experience a temporary lull in wind and rain, and then strong winds and rainstorms will hit the east.

if you are in the gap of the typhoon's spiral clouds, you are not completely safe. the typhoon's outer spiral clouds will continue to be thrown ashore, especially on the north side where the wind and rain are stronger, and the rainfall may come in waves.