When will the typhoon arrive in Shandong?

Typhoon Du entered Shandong northward on July 30th, 2023.

On the morning of July 28th, Shandong Meteorological Observatory held a press conference on Typhoon Du, indicating that the impact of Du on Shandong Province was mainly rainfall. It is predicted that there will be heavy precipitation in the western and central parts of Shandong Province from the night of 28th to the day of 3 1 day. The meteorological department will closely monitor the typhoon trend, strengthen tracking and judgment, and timely release forecast and early warning information.

The accumulated average precipitation in the whole province is 80 ~110mm, of which Heze, Jining, Zaozhuang, Linyi, Rizhao, Jinan, Taian, Zibo, Weifang West, Liaocheng, Dezhou, Dongying and Binzhou are more than 250mm, and other areas are 20 ~100mm. At the same time, the wind gradually increases from south to north. Southeast wind, there are 7 gusts in the central Yellow Sea and Bohai Sea, 8-9, 6-7 in the Bohai Strait, northern Yellow Sea and inland areas, and 8 gusts.

Formation principle of typhoon:

1. Warm and hot seawater: A large amount of warm and hot seawater is needed for typhoon formation, and the seawater temperature is usually required to be above 26.5 degrees Celsius. Such warm seawater provides sufficient water vapor and is the energy source for typhoon formation.

2. Airflow Convergence: On the sea surface, due to the influence of the earth's rotation and topography, the airflow will converge, that is, the airflow will converge. This convergence will cause the air to rise and form a low pressure area.

3. Initial disturbance: Over the tropical ocean, there are usually some weather disturbances, such as storms and convective clouds. When airflow convergence and seawater evaporation provide enough energy, these disturbances can gradually develop into typhoons.

4. Cyclone formation: Due to the influence of the Coriolis force of the earth's rotation, the low-pressure area began to rotate. When the converging airflow continues to rise, it will form a cyclone and begin to have a certain scale.

5. Tissue growth: When a typhoon forms, it will be supplemented by tropical ocean energy and continue to develop and grow. When the wind speed exceeds 17.2 meters per second (about 7 winds), it is called a tropical storm. When the wind speed continues to increase and exceeds 32.7 meters per second (about 12 wind), it is called a typhoon.