be careful! Typhoon fireworks may bring serious wind and rain impact to East China
China weather network news according to the prediction of the Central Meteorological Observatory, this year's No. 6 typhoon "fireworks" may land along the coast from Zhoushan, Zhejiang to Yuhuan from the afternoon of the 25th to the early morning of the 26th. It is worth noting that after landing, it may linger in East China, bring extreme heavy rainfall to Zhejiang, Shanghai and other places, or go north to affect Jiangsu, Anhui and other places.
According to Xin Xin, chief meteorological analyst of China weather, this typhoon impact period coincides with the astronomical spring tide. The sea level along the coast of Zhejiang and Shanghai is high. The low pressure attraction of the typhoon (lower than the original normal pressure, the pressure of the air column on the sea surface decreases, resulting in the rise of the sea surface) and the boost of the onshore wind (east wind) may make the sea level higher and higher, That is, astronomical spring tides and storm surges form a superposition. Moreover, Hangzhou Bay is in the shape of a bell mouth. When the east wind comes in, it is easy to form aggregation and accumulation, and the water level is high.
Drawn by: Huo Yunyi
Once the water level of the sea level is high, the height drop between the land and the sea surface decreases. At this time, there will be heavy rainfall in the inland, especially continuous heavy rainfall, which will lead to poor drainage and waterlogging. When the sea level is higher than the land, there will even be seawater backflow. In October 2013, typhoon fitt landed in China. Combined with the cold air, there was a rare severe rainstorm in Zhejiang. At that time, the astronomical spring tide superimposed the storm surge, and the waterlogging in Yuyao was seriously affected.
Drawn by: Huo Yunyi
It is worth mentioning that due to some uncertainty in the forecast of Typhoon "fireworks", it may linger in East China after landing, bring extreme heavy rainfall to Zhejiang and Shanghai, or go north to affect Jiangsu, Anhui and other places, with serious wind and rain impact. The public needs to pay close attention to the weather forecast, cancel the coastal travel schedule and make preparations for typhoon prevention.
be careful! Typhoon fireworks may bring serious wind and rain impact to East China
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