The Impact of Typhoon Du on Beijing

Typhoon Du brought strong winds and rainfall to Beijing.

Typhoon Du landed on the coast of Fujian on the morning of 28th, and weakened into a tropical depression at 1 1 on 29th, and the Central Meteorological Observatory stopped numbering it. Although the numbering stopped, the pattern of low-pressure circulation still exists.

Due to the continuous influence of low-pressure circulation and its interaction with other weather systems during the movement, the southerly warm and humid air flow around the subtropical high will be further strengthened.

The weakened low-pressure circulation and the southerly warm and humid airflow around the subtropical high will be well combined in Beijing, Tianjin and Hebei. In this situation, it will bring a heavy rainfall to Beijing and a large area of Beijing, Tianjin and Hebei.

In terms of rainfall, it is predicted that from the night of 29th to August 1, Du will bring a heavy rainstorm to Beijing, which is the main stage of rainfall in some areas. During the rainstorm, there will be northerly winds of grades 6 and 7.

Cause analysis:

Zhang Linna, chief forecaster of Beijing Meteorological Observatory: According to meteorological records, only 23 typhoons weakened the low-pressure circulation and affected Beijing during the period from 1949 to 2022, so an average of 0.3 1 typhoon affected Beijing every year. This time, the influence of Du's weakened low-pressure circulation on Beijing should be said to be extreme.

According to our current forecast, Du's influence on Beijing's precipitation is likely to rank first or second in the typhoon's influence on Beijing. It should be said that the influence is still great.

Whether the typhoon generated in the northwest Pacific will affect Beijing depends largely on its path, and its path depends more on a form of the whole atmospheric circulation, so we pay more attention to a situation of the whole atmospheric circulation when making predictions.