Why does the rain in Beijing never stop?

Zhao Wei, chief forecaster of the Beijing Meteorological Observatory, explained that the heavy rainfall process in North China was affected by the low vortex system. This low vortex precipitation is very efficient and violent when it comes, but at the same time It has the characteristics of spiral rainbands, with periods of pause and intermittent rainfall.

The public may think that after a wave of rain stops, they think it is gone, but in fact, there are second waves, third waves or even more. This is similar to the characteristics of low-vortex precipitation. relation. Judging from the actual situation, around 18:00 last night, the rain front arrived in Beijing first, bringing the first wave of precipitation to Beijing, followed by the second wave from 22:00 to 23:00, and then the third wave from 5:00 to 6:00 this morning. There are three waves. Currently, urban areas and southern areas are in an intermittent period of rainfall.

Zhao Wei explained that the low-vortex system does not have the same impact as the high-altitude trough on Beijing. When the high-altitude trough comes, it is a rainband, and when it passes, it passes, and the rain ends with the next wave.

However, from the cloud map, the low vortex system is a spiral echo rainband, which will keep rotating. For example, the rainband affecting the urban area has passed and turned to the north, but it will turn back after a while. If we turn back, there will be another wave in the urban area. It will take until the central body of the entire low vortex system turns out of Beijing that the rainfall will finally weaken and end, so the overall time will be relatively long.

The impact of the rain in Beijing on aviation

On July 12, due to the rain, Beijing Capital International Airport and Beijing Daxing International Airport have reduced 462 flights. Passengers are advised to contact the airline to confirm flight information before traveling. ?

The reporter learned from the North China Air Traffic Control Bureau that on July 12, the Capital Airport planned to have 779 inbound and outbound flights. Affected by thunderstorms, 306 flights have been reduced and 7 flights have been diverted to other stations. Daxing Airport reduced 156 flights throughout the day and planned to execute 598 flights. ?

As of 10:55 on July 12, the North China Air Traffic Control Bureau has guaranteed 184 flights in and out of the Capital Airport and 92 flights in and out of Daxing Airport. Ensure that one vaccine transport flight takes off early. ?

It is expected that there will be a more obvious rainfall process at the Capital Airport from 16:00 to 19:00 on July 12. Currently, some air routes in North China, as well as Chongqing, Wuhan and other areas are affected by thunderstorms and their traffic capacity is reduced. It is expected that Guangzhou Airport will be affected by thunderstorms from around noon to evening and its traffic capacity is reduced.

Reference for the above content? Beijing News-The rain is "to be continued" Why did it rain in Beijing for so long?