Shanghai is now a spectacular arc cumulonimbus cloud. How did this cloud form?

Spectacular arc cumulonimbus clouds appear in Shanghai, and the formation of this cloud is related to strong convective weather.

1. Arc cumulonimbus clouds generally occur in strong convective weather. Arc cumulonimbus clouds generally occur before the storm, because the collision between cold air and hot air leads to the spread of hot air in all directions. Arc cumulonimbus clouds are the fronts of cumulonimbus clouds and thunderstorms. At this time, dense, arc-shaped and sometimes even silky horizontal scroll-shaped clouds will be formed in the front and lower parts of the clouds.

The formation of arc cumulonimbus clouds is generally a prelude to the storm, which also means that the wind is increasing and the wind direction is abrupt, and obvious strong convective weather is coming. Therefore, if you see such a cloud forming, you should prepare for the rainstorm in advance and minimize outdoor activities. Don't travel unless necessary, and you must pay attention to safety when traveling.

Second, the classification of arc cumulonimbus clouds can be divided into cirrus clouds and beach clouds.

Cirrus is a very rare arc-shaped low-level tubular cloud. Unlike beach clouds, cirrus clouds are completely independent of other cloud systems. Generally speaking, a tornado cloud seems to rotate around a horizontal axis, which is a solitary wave called a soliton. It is a single peak that is not affected by speed and shape.

The appearance of beach clouds is a rare long cloud. Because it is very similar to the cumulonimbus cloud that produces storms, it often becomes a hurricane. Beach clouds move very fast, sometimes people think it is a sandstorm, and sometimes it looks like a tsunami.

Third, the influence of arc cumulonimbus clouds on Shanghai. After the arc cumulonimbus cloud appeared in Shanghai, the rainstorm increased obviously, and the wind force reached a rare eleventh level. The sky in the Bund and other places is covered with dark clouds, just like night.

After the arc cumulonimbus cloud appeared, the gust of Songjiang in Shanghai reached 30. 1 m/s, which is the standard of 1/gale, and the cumulative precipitation of1h was also the highest in Songjiang, reaching an astonishing 25.6 mm.