What are the characteristics of rainstorm weather? Causes of heavy rainfall

1. Heavy rains mainly occur during the flood season from May to August. This is mainly due to the fact that the summer precipitation and heavy rains in our country are heavily influenced by the summer monsoon from the Indian Ocean and the western Pacific. The widespread rainy season in China generally begins with the outbreak of the summer monsoon (earlier in South China) and ends with the retreat of the summer monsoon.

Rainfall intensity and variation are closely related to the summer monsoon pulsation.

Second, the rainstorm lasts for a long time. The duration of heavy rainfall in China ranged from a few hours to 63 days, and some people believe that the rainy season in 1896 reached 65 days. The length of the main rainstorm is 2 days to a week.

The persistence of heavy rain is an obvious feature of heavy rain in China, whether it is North China, the Yangtze River Basin and South China.

3. Heavy rain intensity and high extremes. If compared with other countries in the same climate zone, the intensity of heavy rain in our country is very large, and the extreme values of heavy rain of different time lengths are very high. For example, the extreme value of 531 mm in 5 minutes (Meitonggou, Shaanxi, 1 July 1971), the extreme value of 1 hour rainstorm is 1983 mm (Linzhuang, Henan, 5 August 1975), and the extreme value of 24-hour rainfall is 1248 mm (Taiwan, 10 September 1963), although these values do not break the world record of 1870 mm (24 h) (Southwest Indian Ocean, Reunion), but they are much larger than those recorded in similar climate zones (such as the United States).

For example, the 24-hour precipitation extreme in the United States is 983 mm (Florida).

Stormy weather usually leads to strong winds. It was very dark in the sky. There is generally no thunder.

The intensity of precipitation on the warm front is small, and heavy rain will not be formed. Typhoons mainly affect the southeast coast, and have little impact on the northern region, so it is not easy to affect the northern inland. Under the influence of an anticyclone, the weather is clear.

In summer, the water vapor in the air is relatively abundant, and the strong cold air meets the warm and humid air to form a cold front, and the warm and humid air rises sharply, forming heavy rainfall.

What are the characteristics of rainstorm weatherWhat are the characteristics of rainstorm weather? A rainstorm is a sudden heavy rainfall, which is a two-three, an hour, two hours, or one to a few hours, and the rain is particularly heavy.

When a heavy rainstorm comes, the most important feature is that it rains very heavily, and it goes on and on, and at the same time, there is lightning and thunder, and there are dark clouds in the weather, and it comes with fog and rain.

What's the characteristic of a rainstorm is that it's getting dark, and then it's dark and cloudy, so I didn't call you, it's going to be rainstorming.

Rainstorm weather is characterized by heavy rain.

In fact, the characteristics of rainstorm weather are obvious, for example, the weather will be particularly hot and humid before the rainstorm comes. There will also be dark clouds. These are all precursors to storms, to come. So when we see these things happening, it means that there is a rainstorm coming.

The process of rainstorm formation is quite complex, generally from the macroscopic physical conditions, the main physical conditions for the production of rainstorm are sufficient water vapor, strong and persistent upward movement of air currents and the instability of the atmospheric structure.

The more abundant water vapour is in the atmosphere, the greater the chance of heavy rainfall.

Heavy rain also requires a strong sustained upward movement so that the water vapor in the atmosphere can continue to condense and form raindrops. The southwesterly or southerly airflow from the tropical ocean is the conveyor belt of water vapour, and the southwesterly airflow on the northwest side of the high pressure generally carries sufficient water vapour. When the low-level southwesterly airflow reaches a certain strength (wind speed exceeds 12 m/s), it is called a low-level jet stream, and when other conditions are favorable, the low-level jet stream can generally form heavy rainfall.

1. Typhoon: Typhoon brings a large amount of water vapor from the ocean, adding to the atmosphere.

Strenuous exercise is prone to heavy rainfall.

2. Cold and warm: the cold air mass and the warm air mass meet to form a cold front.

Rainstorms form in a short period of time.

3. Temperature: In summer, the temperature is high, and the water vapor evaporates vigorously, forming convective movement and producing heavy rain.

Heavy rain: Heavy rain refers to rain with high precipitation intensity, often formed in cumulonimbus clouds. China meteorologically stipulates that 24-hour precipitation.

Heavy rainfall of more than 50 mm.

It's called "heavy rain". According to the intensity of precipitation, it is divided into three grades, that is, the 24-hour precipitation is called "heavy rain" when it is millimeters, and the heavy rain between millimeters is called "extremely heavy rain". However, due to the different precipitation and topographic characteristics in different places, the standards of heavy rain and flooding are also different in different places.

In business practice, heavy rainfall can be divided into local rainstorm, regional rainstorm, large-scale rainstorm, and extra-large rainstorm according to the size of the occurrence and impact range.

torrential rain (English name torrential rain; rainstorm;storm refers to rain with a high intensity of precipitation, often formed in cumulonimbus clouds. According to China's meteorological regulations, rain with an hourly rainfall of more than 16 mm, or 12 consecutive hours of rainfall of more than 30 mm, and a 24-hour rainfall of 50 mm or more is called "heavy rain".

In the weather forecast, this definition is judged by the amount of precipitation in 24 hours, as well as the amount of precipitation in previous years, and if it exceeds this value, it is judged as heavy rain, and if it is not exceeded, it is judged as light rain.

In weather forecasting, heavy rain is defined according to the level of rainfall, as well as the amount of rainfall.

According to Chinese meteorology, heavy rainfall with more than 50 mm of precipitation in 24 hours is called heavy rainfall.

It should be a rainstorm with 50 100mm of rainfall 24 hours a day.

The reasons for the formation of heavy rains are as followsThe formation of rainstorm is particularly complex, physically speaking, it produces rainstorm, its condition is the instability caused by rising water vapor and airflow, and the atmosphere is also unstable, all kinds of weather are related to the terrain, so it will produce relatively large rainstorms. <>

Causing a wide range of heavy rain, that is, there are typhoons or tropical convergence zones, etc., these reasons have caused large-scale heavy rains in China, and now in arid places, it is also possible to cause heavy rains, but heavy rains often come down from the clouds, and the conditions for the formation of heavy rains must also have water vapor, and there is a rising movement, the water vapor is sent up, so that the water droplets in the clouds will rise, and when the clouds cannot hold it, it will fall to the surface. <>

If it is a very dangerous place, and the lower terrain should be transferred immediately, outdoor activities should be stopped immediately, and the school can no longer be held, classes should be stopped, the circuit or gas in the house must be checked to see if it is safe, and they must turn off their main switches, and they must also collect the clothes that are dried outside in advance, and pack up the valuables at home and put them in a higher place. I can no longer do field work. <>

If people outside the house should go to a high place, first take shelter after the rainstorm measures, you should prevent the occurrence of residential housing, put a water barrier at home, pile sandbags or ridges so that you can, dangerous places can move people to a safe place, turn off the gas valve and the main switch, if there is water in the house, you should cut off the power supply to prevent electricity from hurting people. If we walk outside the house, we must pay attention to walking close to things to prevent falling into the pit, so as to keep our personal safety, and we must not panic, and we must maintain our own mentality. As long as it exceeds 24 hours in meteorological regulations, precipitation of more than 50 mm is called heavy rain, because of the difference in various places, so the standard of heavy rain is also different, and the heavy rain is a disastrous weather, which will lead to a series of life obstacles.

The description of the rainstorm in the second grade is as follows:

1. The wind is as tight as a gust, the rain is also as tight as a gust, and the downpour rains fall from the sky like a silver curtain hanging in the air. There was only the sound of "whoosh" in my ears, and the raindrops were like dense barbed wire, blowing from the sky to the ground endlessly, as if the Tianhe River had broken and fallen a torrential rain.

2. Immediately afterward, the storm swept in, pouring rain! Heavy raindrops rained violently on rooftops, on roads, and on tree branches, thundering and lightning, and violent winds. It's as if the world wants to swallow up the entire universe!

The wind began to roar outside, shaking the windows violently, shaking them with a "clang" sound. The pouring rain poured into the pond like fried beans, splashing water. Under the arrival of the storm, how could Grandpa Lei not come?

3. In an instant, the wind was blowing, and dark clouds filled the sky, and then the raindrops the size of beans fell from the sky, making the windows crackle. It's another thunderbolt, deafening. Suddenly, the raindrops were connected into a line, and with a bang, the heavy rain sloped down from the sky as if the sky had fallen.

4. The breeze blows, and the rain curtain is slanted, like filaments running towards the grass and trees, and the wall. The rain is sprinkled down, and the leaves of various flowers and plants are condensed with crystal droplets.

5. I only heard a roar in the sky, and the rain shot down like an arrow! With the deafening thunder, came the storm! It's like a storm "arrow" rain, the rain is falling wildly in an instant, and the thunder is getting louder and louder, the wind is roaring, and the thunder is roaring!

The sky is roaring! The clouds grew more and more, the rain grew heavier, and then a burst of lightning struck a tree!

Heavy rain refers to the weather phenomenon of Tsuyoga that produces heavy rainfall in a short period of time.

This is manifested in the rainfall of more than or equal to 50 mm in 24 hours, and the meteorological definition of heavy rain has stricter magnitude regulations.

According to the "Precipitation Grade" issued by the relevant departments, there are two different provisions on rainfall according to the cumulative rainfall time in the national standard.

"Like a splash, like a pour. The short four words constitute two sentences, which not only describe the magnitude of the rain, but also show the ferocity of the rain, which paves the way for the flash flood outbreak below.

Heavy rain like splashing water with a scoop. Describe how it rains very heavily.

The rain was so heavy that it poured like water in a basin. Describe the rain as urgent. Like splashing, like pouring, they all use exaggerated techniques to describe that the rain is very heavy.

The rhetorical technique of purposefully enlarging or shrinking the image characteristics of things on the basis of objective reality to enhance the effect of expression is also called exaggeration or extravagance. Refers to the use of exaggerated words to describe things in order to enlighten the imagination of the reader or listener and to enhance the power of the words spoken. In the sentence, "like splashing, like pouring", exaggerates the characteristics of raining a lot, which arouses the reader's rich imagination and strong resonance.