When will Typhoon Du arrive in Hebei?

Typhoon Du arrived in Hebei on July 29th.

On July 29th, the Meteorological Publicity and Popularization Center of China Meteorological Bureau (China Meteorological News), together with the Central Meteorological Observatory, the Meteorological Service Center of China Meteorological Bureau and the meteorological departments of Beijing, Tianjin, Hebei, Shandong and other provinces (cities), held a media briefing on the rainstorm in North China. It was learned from the meeting that Typhoon Du continued to affect Hebei Province northward, and it is expected that there will be a heavy rainfall process in the whole province.

The comprehensive risk level of this rainy weather process is high. In response to this process, Hebei Meteorological Observatory has upgraded and released the rainstorm red warning signal. The characteristics of this precipitation are extreme, long duration, wide influence range and high disaster risk. Mountain torrents, floods in small and medium-sized rivers, geological disasters and urban waterlogging disasters have high risk levels.

It is necessary to prevent mountain torrents, floods in small and medium-sized rivers and geological disasters in advance, and pay special attention to the possibility of floods in small and medium-sized rivers in the upper reaches of xiong'an new area. It is necessary to strengthen the prevention of disasters such as urban waterlogging and farmland waterlogging, and focus on ensuring infrastructure such as roads, communication facilities and power facilities in Taihang Mountain area and Yanshan Mountain area.

The reason why Typhoon Du can still travel long distances after landing;

Generally speaking, after the typhoon landed, the wind speed near the typhoon center will gradually decrease under the action of terrain friction on the underlying surface. As it goes further inland, the water vapor supply from the ocean will also decrease, leading to the weakening and dissipation of the typhoon. After Du landed in Fujian, under the influence of mountainous terrain in Fujian, Jiangxi and Anhui, he quickly weakened and stopped numbering.

However, it takes one day to cross the above mountains, and the moving speed is about 25 kilometers to 30 kilometers per hour, which is relatively fast among the moving speeds of typhoons. This also retains some strength for its residual low pressure cycle. Subsequently, Du Julie's residual low pressure gradually approached North China, although its moving speed slowed down.

However, the terrain on the way is relatively flat, and the water vapor channels on the east and south sides of the low pressure are clear, and the water vapor is constantly replenished. In addition, the strong divergence area on the right side of the inlet area of the upper jet stream is conducive to maintaining the ground low pressure, so the low-pressure circulation has been maintained for a long time and a long journey has been realized.

Baidu Encyclopedia-Typhoon Du Surui