Heavy rain ＂fought＂ in Northeast China! How big is the rainstorm, rainstorm and torrential rainstorm？

　　According to the Central Meteorological Observatory, from 22nd to 23rd, the rainfall in the north will shift to Liaoning, Jilin, eastern Inner Mongolia and other places, among which Liaoning will experience the largest rainstorm this year, and the accumulated rainfall in some areas will exceed 100mm.

　　In terms of temperature, the northwest region will become the "main position" of high temperature in the coming week, and the local maximum temperature can reach above 40℃. In many places in the south, the high temperature increases, the air humidity increases and the sultry feeling intensifies.

　　Northeast China enters the main rainfall period.

　　Four districts in Beijing issued rainstorm warning

　　The Central Meteorological Observatory continued to issue a blue rainstorm warning at 6 o’clock on the 22nd. It is expected that there will be heavy rains in parts of eastern Inner Mongolia, Liaoning, central and western Jilin, southern Heilongjiang, northwestern Jiangxi and northeastern Hunan during the day and night on the 22nd, and there will be heavy rains in parts of southeastern Inner Mongolia, western Jilin and central and western Liaoning.

　　On the 22nd, Haidian District, Chaoyang District and Pinggu District of Beijing issued a blue rainstorm warning, and Shunyi District issued a yellow rainstorm warning.

　　On the 23rd, there were moderate to heavy rains in parts of Heilongjiang, western Jilin, southeastern northwest, central Tibet, central and eastern Jiangnan and northern Sichuan Plateau, among which there were heavy rains in parts of central and western Heilongjiang.

　　Before the end of the month, there may be two rainy weather processes in the northern region. From 24th to 26th, there may be heavy rain in parts of North China, Huanghuai and Northeast China. From 28th to 31st, the eastern part of the northwest, north China, northeast China and other places will see obvious rainfall again.

　　The highest local temperature in northwest China is over 40℃

　　The high temperature in many places in the south has increased and the sultry feeling has intensified.

　　Northwest China is controlled by continental high pressure or high pressure ridge. In the next 10 days, high temperature weather will continue in Xinjiang basin, western Gansu and western Inner Mongolia. The highest temperature is generally 35℃ to 38℃, and the local temperature can reach above 40℃.

　　In the south, with the enhancement of subtropical high, the high temperature weather will also increase obviously. All the year round, in late July, many places in the south ushered in the period with the highest temperature in a year. In addition, the air humidity is high and the sultry feeling is aggravated, and many places will start the experience of "steaming up and cooking down".

　　■ How big is the rainstorm and rainstorm?

　　There is a clear distinction between rainstorms in meteorology. In China, rain with a 24-hour precipitation of 50 mm or more is called "rainstorm". According to its precipitation intensity, it is divided into three grades:

　　24-hour precipitation exceeding 50 mm is called "rainstorm";

　　More than 100 mm is called "heavy rain";

　　More than 250 mm is called "torrential rain".

　　However, every rainstorm is different. Whether the rainstorm lasts evenly in 24 hours or "pours down" in a short time will bring different impressions to the public.

　　■ What is a rain belt?

　　Observing the rainfall distribution map in flood season, it is easy to find that the rainfall is obviously banded, and the rain belt will move with time. Some areas are sometimes located at the southern end of the rain belt, and after the rain belt moves, it is located at the northern end of the rain belt, during which the rain does not stop.

　　In fact, the "tangible" rain belt is related to the subtropical high, a weather system that affects China’s weather all the year round. Subtropical high pressure prevails in downward flow, and the air is dry and hot, like a big steamer buckled on the ground. However, in the marginal area of subtropical high, updraft prevails, which is one of the necessary conditions for rainfall. The rain belt will swing with the seasonal movement of subtropical high.

　　■ Where is the "local" in the weather forecast?

　　"Local" is not a specific location in the weather forecast, but to some extent expresses the uncertainty and possible extremes of the forecast.

　　"Local" is often associated with strong convective weather such as thunderstorms, hail and short-term heavy precipitation. Most of these severe convective weather are produced by small and medium-scale systems, with short life history and rapid extinction. With the current forecasting ability, we can only predict the possible range of local strong weather in advance, but we can’t predict its exact location in advance.

　　Transfer from/CCTV News WeChat Comprehensive China Weather Network, Central Meteorological Observatory, China Meteorological Bureau, Beijing Meteorological Bureau