How does the rainy season belt move in China?

Movement of rainy season zone in China:

It landed in the south in May, moved to the middle and lower reaches of the Yangtze River in June, reached North China and Northeast China in July and August, and began to withdraw southward in September.

Formation conditions of plum rain in rainy season:

1. There is blocking high pressure or stable high pressure ridge in the middle troposphere in high latitudes of Asia, and the atmospheric circulation is relatively stable with little change.

2. The westerly circulation in the mid-latitude area is gentle, and frequent short-wave activities provide cold air conditions for the Jianghuai area.

3. The western Pacific subtropical high has an obvious process of extending westward and jumping northward. The ridge line of the 500 HPA subtropical high is stable between 20 and 25 degrees north latitude, and the warm and humid air flow is transported from the edge of the subtropical high to the Jianghuai basin. Under this circulation condition, Meiyu front lingers in the Jianghuai basin, often accompanied by southwest vortex and shear line, and the mesoscale system on Meiyu front is active. It not only maintains the continuous precipitation during the Meiyu period, but also provides abundant water for the rainstorm.

Special circumstances of Meiyu:

Meiyu front rainstorm is a special weather in a specific area formed by the interaction of circulation systems of different scales. The variability of atmospheric circulation leads to the late start and short duration of meiyu period every year. In some years, the Meiyu front is particularly active, with frequent rainstorms, leading to flooding.

In some years, the meiyu front is not obvious, and there are "empty plums", which leads to dry weather. In some years, the Meiyu belt will move northward and then return to the Jianghuai basin to maintain relative stability, which is customarily called "inverted Huangmei". After the meiyu in Jianghuai basin ended, the rain belt moved to North China, and the Jianghuai basin entered high temperature and little rain.

Meteorologically, the beginning and ending time of plum rain are called "entering plum" (or "standing plum") and "leaving plum" (or "breaking plum") respectively. In the middle and lower reaches of the Yangtze River in China, plum blossoms come in mid-June and come out in early July every year for more than 20 days. But for each specific year, the beginning and end of meiyu and the intensity of meiyu are very different.

Matters needing attention when it rains:

1, take an umbrella when you go out.

When it rains, we should take precautions. Therefore, when we go out, whether it rains or not, we must remember to bring an umbrella.

2. Don't go near the river.

It is dangerous to be by the river in rainy days, because the river is extremely unstable at this time.

Don't walk when there is thunder and lightning.

Rainy days are most prone to thunder and lightning, so try not to walk around at will. If we are already in the wild, we should pay more attention to lightning protection.

Step 4 be careful on the road

Even after the rain stops, we should be extra careful when we go out and walk on the road. Especially when it rains, we should pay more attention to strong winds, because strong winds can easily blow off power lines, and at this time the ground is slippery and has strong conductivity. If people get close, the risk of electric shock is extremely high.

Wet clothes should be changed soon.

No matter where you are, change your clothes that are wet by the rain. Don't wear it casually, or even wait for the clothes to dry naturally. Although rain will evaporate, moisture will penetrate into the body, causing various diseases such as colds and rheumatism, and the consequences are very serious.

6, caught in the rain should be handled in time.

If you get caught in the rain, you must deal with it in time, otherwise you will easily catch a cold. First, change into wet clothes, and then dry the rain on your body with a dry towel, especially the rain on your hair. If possible, you'd better take a hot bath.