How long does the rainy season last in Wuhan? Will there be heavy rain in Wuhan tomorrow?

It is rainy in Wuhan now, and it will continue to rain. Friends should pay more attention. The weather forecast shows that there will be a rainstorm tomorrow and Friday. Remember to take an umbrella when you go out, and go home early at night to be careful of the rainstorm.

How long?

Meiyu time in the middle reaches of the Yangtze River: June 8 to July 9, and this year will last until mid-July.

Changmeiyu

Normal Meiyu in the middle and lower reaches of the Yangtze River begins in mid-June and ends in mid-July, which is in the two solar terms of "ear seed" and "summer solstice". The meiyu period is about 20-30 days, and the rainfall is between 200-400 mm. Before and after "Little Summer", the main rainfall belt moves northward to the Yellow River and Huaihe River basins, and then to Shandong and North China. The Yangtze River basin began to change from rainy and humid weather to sunny and hot summer. According to statistics, this normal plum rain accounts for about half of the total.

Early plum rain

In some years, the rainy season starts very early and suddenly comes at the end of May and the beginning of June. Meteorologically, the plum rain that began before "Mangzi" is generally called "early plum rain". The early plum rains will bring some abnormal phenomena. For example, since the cold air from north to south is still very frequent in the atmosphere near the ground at the beginning of the rainy season, the temperature is still relatively low and even chilly after the rainy season. The farmer's proverb says, "Eat Dragon Boat Festival Brown and freeze it three times". At the same time, there is no obvious damp phenomenon.

Farmers in some areas in the middle and lower reaches of the Yangtze River refer to Huang Meiyu, where the temperature is relatively low, as "cold water Huangmei". In the future, with the extension of rainy time and the strengthening of warm and humid air, the temperature will gradually increase, the humidity will continue to increase, and the inherent characteristics of Meiyu will become more and more obvious. The chance of early plum rain is roughly once in ten years. This kind of early plum rain often presents two situations. One is to start early and end late, even in late July. The rainy season lasts for forty or fifty days, and some years last for two months. The other is to start early and finish early. By the end of June, the middle and lower reaches of the Yangtze River had entered midsummer. Due to the early arrival of midsummer, droughts of different degrees often occur in the middle and lower reaches of the Yangtze River.

Chi Meiyu

Contrary to early plum rain, late plum rain is usually called late plum rain in meteorology. There are more opportunities for late meiyu than early meiyu.

Because the solar term is already late, at the beginning of the late Meiyu, once the warm and humid air flows northward, its power is very strong, and the solar radiation is also relatively strong. When the air is heated, it is prone to strong convection, so there are often thunderstorms and showers in the later period of Meiyu.

People also call this kind of Huang Meiyu "Huangmei". The duration of the late Meiyu is generally not long, with an average of only about half a month. However, the rainfall of this plum rain is sometimes quite concentrated.

Ultra-long plum rain

During the period of 1954, a once-in-a-century flood occurred in the Jianghuai basin of China. The flood was caused by a particularly long-lasting plum rain. This year, there were many spring rains in the middle and lower reaches of the Yangtze River in the second half of May before the beginning of Meiyu. Meiyu came very early and began in early June. The weather has been rainy and rainy, with heavy rain and heavy rain from time to time, which lasted for a long time until the beginning of August. When the rainy weather ended and turned to midsummer weather, it was near "beginning of autumn". This year, the whole meiyu period lasted for two months, and with the spring rain in May, it reached more than two and a half months. After entering the "little summer" and "big summer", the middle and lower reaches of the Yangtze River should have been sunny and hot "dog days", but it has been gloomy and difficult to see the sun. From time to time, pouring rain poured down to the ground, floods rolled in, and "cold" hit people in many areas.

In this year, the rainfall in the middle and lower reaches of the Yangtze River from May to July is generally 800- 1000 mm, which is close to the annual rainfall in normal years in this area. The rainfall in some areas is as high as 1500-2000mm, which is equivalent to the rainfall in the same area for one and a half years, leading to flooding. China has a vast territory, and local floods often occur. Some may be caused by typhoon rainstorm, and some may be caused by several consecutive rainstorms brought by other weather systems, but their duration is not long, the flood recedes quickly, and the influence range is relatively small. It is extremely rare that the rainfall time like 1954 reaches more than two months, resulting in a basin-wide flood in the Yangtze River basin. This rare flood is usually associated with abnormal plum rains. Like the flood in 1998, it was also caused by the extremely long plum rain.

Will there be a rainstorm tomorrow?

Yes, there will be heavy rain and strong wind this Friday! It will rain at the weekend. The most uncomfortable thing is that it will rain in the week after July 2, that is, from July 3 to July 10.