According to the Shanghai Central Meteorological Observatory: The center of this year's No. 14 typhoon "Plasang" (tropical storm level) made landfall for the second time on the coast of Fengxian District, Shanghai at around 21:45 today (19th). The largest area near the center whe

Wu Rui, chief service officer of Shanghai Meteorological Bureau, specially reminded that the landing of typhoon does not mean the end of the impact. Sometimes the wind and rain will continue.

From birth, development and landing at sea, typhoons advance all the way, often accompanied by powerful destructive power. Typhoons usually have two endings after they land -

One is weakening and dying. The gradual demise of typhoons is mainly due to two factors. On the one hand, compared with the sea surface, the land is rougher and has many obstacles. Friction will consume the energy of the typhoon and make it weaker. On the other hand, there is sufficient water vapor on the sea surface, which can continuously replenish energy for typhoons. However, after landing, that is, after running on land, the energy source decreases rapidly, and the typhoon will continue to weaken and die.

The second is that after the typhoon degenerates into an extratropical cyclone and moves northward to the temperate zone, its warm core symmetrical structure is destroyed. The influx of cold air and the formation of a deep cold center make it lose the characteristics of a tropical convective system. eventually transformed into an extratropical cyclone. However, the degeneration of a typhoon does not mean that its wind and rain influence is weakened. On the contrary, during the degeneration process, the combination with cold air may cause the extratropical cyclone to stimulate stronger energy and bring stronger storms.

Wu Rui said that the landing of the typhoon does not mean the end. After the typhoon makes landfall, its intensity will gradually weaken, but it still carries abundant warm and moist air. The interaction of this warm and moist air with cold air may cause heavy rains or even heavy rains, as well as strong weather such as thunderstorms and local tornadoes. Even if the typhoon ceases to be numbered, it does not mean that it is completely dead. Its remnants will still have serious impacts.

According to the latest news from the meteorological department, this year's No. 14 typhoon "Plasang" will affect this city. In order to effectively ensure the safety of road traffic, will implement temporary control measures on the following roads starting from 21:30 on September 19th:

1. For expressways in Pudong, Fengxian, Jinshan, and Chongming districts (including cross-sea, Jiangdaqiao) speed limit 40 km/h;

2. The entrances to expressway toll stations in Pudong, Fengxian, Jinshan and Chongming districts will be temporarily closed depending on the situation.

During the period of road traffic control, vehicles for public security, emergency rescue, rescue and disaster relief, medical emergency, supply guarantee and other transportation of national economy and people's livelihood are excluded.

The Public Security and Traffic Police Department reminds you: For the safety of your life and property, please try not to go out unless necessary during the typhoon. Before going out, citizens should be sure to learn about the latest road conditions, traffic restrictions, and road closures through various media channels to ensure travel safety.

@Yangtze River Delta Railway released news: According to the latest forecast of the path of Typhoon No. 14 "Plasang", in order to ensure the safety and security of railway transportation To ensure the safety of passengers, the railway department plans to temporarily suspend operations on the Jinshan Railway from 21:30 on September 19, and adopt speed-limiting measures on the Shanghai-Hangzhou High-speed Railway from 22:30 on September 19.At the same time, in view of the changes in the landing path of Typhoon "Plasang" and the gradual weakening of the impact on some lines of transportation, the railway department plans to resume operations on some passenger trains passing through the Hangzhou-Shenzhen High-speed Railway, Hangzhou-Taiwan High-speed Railway and other lines on September 19 to better meet the needs of passengers. Travel needs.

Sources: Central Meteorological Observatory, Municipal Meteorological Service Center, Xinmin Evening News