Netizens are hotly discussing the most terrible hail they have ever seen, what is the hail in everyo

On the night of May 9, 2021, severe convective clouds appeared over southern China, and thunderstorms, strong winds, and hail occurred over most parts of Fujian Province. Coincidentally, a squall line also appeared in Guizhou Province, which is located on the Yunnan-Guizhou Plateau in China. On the evening of May 9, many areas in Guizhou were affected by the squall line, and many areas of Guizhou were hit by strong winds.

For example, monitoring data shows that the Guizhou Provincial Squall Line caused strong winds of 12 meters per second at the national station in Qianxi County. Strong convective weather is not uncommon in Guizhou, but on the night of May 9, the strong convective weather was really violent, including Guiyang City, the capital of Guizhou Province, thunderstorms were frequent, short-term heavy rain hit, netizens ** showed that Guiyang City even appeared hail at night, and the hail was relatively large, larger than the egg, this hail and strong wind have a certain destructive power, some netizens said that the windows are particularly loud, which may bring more serious harm to the local agriculture and forestry production in Guizhou.

Short-term convective weather is normal summer weather. As summer approached, I started to experience more and more convective weather, such as showers, thundershowers. From spring to summer, the weather is prone to hail.

However, it is really confusing if we deduce from common sense that it can be formed not only in cold winters, but also that this phenomenon appears in summer. Because of the wealth and vastness of our country, the climate varies from place to place, and certain areas are always affected by hail.

A large amount of water vapor rises rapidly to the air after being exposed to strong sunlight in the hot summer, and after meeting with cold air, it becomes ice crystals and falls, and in the process of falling, small water droplets in the air adhere to each other and become blood beads, and the blood falls again, flowing the rising high heat back to the sky. The circle rolls bigger and bigger like a snowball in the clouds, and the heavier the tumbling weight, when it reaches a certain weight, it will fall directly to the ground, which is the so-called hail, Xiaoice hail such as soybeans, eggs, etc., and more exaggerated chopsticks, irregular hail, ball shape.

Hail is a short-term severe convective weather, according to yesterday's weather forecast, heavy rain, heavy rain, short-term strong winds and other short-term severe convective weather will occur in the southern and southeastern regions of our province. The main reason is that the convective motion is strong. With the interaction of cold and warm air, precipitation conditions were met, and part of the precipitation came in the form of hail.

The internal structure of infrared rays is not uniform, but they all have a shell in the middle, called a shell, which is mainly composed of water droplets. There are also small amounts of oil droplets that freeze, forming a transparent ice shell. Debris of different sizes will be mixed in the ice, with some hailstones up to 10 layers or even up to 30 layers.

In fact, in the hailstones you will find many large hailstones, some as big as a basin and even more exaggerated like a car.

It felt like a small stone falling from the sky, and it hurt very much to hit my face, which was my own severe hail.

The hail in the eyes of netizens is the kind of particularly huge hailstone, the kind that can smash a hole in the car glass when smashed down, and the lethality of this hail is very huge.

The hail in everyone's eyes is that ice eggs will fall from the sky, which will hurt people, especially painful, very annoying.

In everyone's eyes, the hail is very powerful, it can break through the car glass, and it will knock the head out of a bag.

It's probably just a Xiaoice ball and a Xiaoice ball, falling from the sky, and then there's a little bit of a little wind, and that's what makes me very excited, because it's rare in my life to have weather like this.

It's very big, and it hurts very much on the body, and hail is actually ice, and it will hurt if it lands on a person's body.

The hail in my eyes is a cube of ice the size of a soldier's ball, and I've touched hail, so I don't know exactly what it is.

In the process of moving with the upward movement of the air flow, the ice particles will absorb the nearby Xiaoice particles or water droplets, and gradually become larger and heavier, and when the updraft can not bear its weight, the ice particles will fall down, but the ice particles at this time are not large enough, if you can encounter a more powerful updraft at this time, push the ice particles down and push them up, the ice particles can continue to absorb small water droplets and condense into ice.

It hurts a lot when it hits people, and the destructive power is also very great, and people won't go out when they see it.

1. Why do hailstones exist on Earth?

Many people think that the principle of hail is very similar to that of snow, that is, after the temperature reaches 0 degrees, the moisture in the air condenses into iceHail only falls when it is blown by the wind, but in fact, the principle of hail is very different.

The cause of hail is due to the hedging of hot and cold air currents, after the two air currents collideAt any time, the gas liquefies and then solidifies, and after solidification, it naturally becomes hail.

In the hot summer, the temperature is very high, but the temperature above a few thousand meters is below 0 degrees, and the high temperature on the ground provides the conditions for the hot air to slowly climb upwards. When the clouds are reached, the cold air collides with each other, and then another wind blows, and then the hail will shine brightly.

Hail is actually caused by the collision of the upper and lower air currents, and when the temperature on the earth reaches a certain altitude, it will be very low. Falling cold air collides with rising thermals, which can cause hail.

The cold air that falls can be mixed with ice crystals and snowflakes, which are all products of the cold air, after colliding with the hot air current, cold water droplets are formed.

In the atmosphere, at the junction of the 0°C clouds, the droplets formed by the hedging of the upper and lower air currents continue to move up and down repeatedly in the 0°C area, which further thickens the hail, as if it were a snowball in the clouds, and after a period of time, the hail visible to the naked eye is born.

2. What are the most basic conditions for the formation of hail?

1. There must be a strong wind change, so as to ensure that the hail can fully move in the clouds.

2. There is an unstable layer in the atmosphereIt has to be quite thick.

The vertical thickness of the cloud is not less than 6 8 kmAdequate liquefaction of hail is guaranteed.

4. The cloud must be oblique, and if you want to ensure that there is an air flow in the cloud, the cloud layer at this time cannot be vertical downBecause the gravitational potential energy that is vertically downward is too large, the energy required is very huge.

Therefore, inclined clouds are more able to allow the airflow to rise, and in inclined clouds, it is easiest to complete the hedging of hot and cold air.

Moisture in clouds must be abundant, and hail requires a lot of water in the process of formation. This is because a small amount of hail is formed when the cold air above collides with the heat flow below, but it is constantly moving in the clouds. The size of the ice treasure changes after exercise, and a lot of water is needed to replenish it.

Because there are conditions in the sky for the formation of hailstones, there will be hail in the sky. Hail is formed by the instant solidification of water when it encounters strong cold air.

This is because there is a lot of water vapor in the sky, and when the cold and hot air currents collide with each other, this water vapor will condense into hail, which is why it will rain from the sky.

This is because the cold and hot air currents above collide with each other and condense the moisture in the air into hail, so hail falls from the sky.

The symbol of hail in the weather forecast is shown in the small triangle below

Hail is formed in cumulonimbus clouds formed by convective clouds, when the water vapor rises with the air flow and colds, it will condense into small water droplets, if the temperature continues to decrease with the increase of altitude, reaching below zero degrees Celsius, the water droplets will condense into ice particles; During its upward motion, it will absorb small Xiaoice particles or water droplets around it and increase until it descends due to its increased weight, and when it descends to a higher temperature zone, its surface will melt into water.

Hail is a kind of disastrous weather that is more harmful to agricultural production in spring and summer. Hail is often accompanied by high winds, drastic cooling, and strong thunder and lightning. A hail struck and reduced production and wiped out the harvest.

Although meteorological stations can make forecasts in advance based on weather maps, satellite cloud image analysis and radar monitoring, the accuracy is still not very ideal. After a long period of observation and practice, people have summarized some common experiences of **hail.

Hail activity is not only related to the weather system, but also greatly affected by topography and landform. China has a vast territory, complex topography, and great differences in landforms, and China has the largest plateau in the world, which makes the atmospheric circulation complicated. Therefore, the hail weather in China has a large impact and a wide range of hail disasters.

China is one of the earliest countries in the world to prevent artificial hail. Due to the serious hail disaster in China, the hail prevention work has received great attention and support. By 2013, many provinces have established long-term experimental sites, carried out rigorous experiments, and achieved many valuable scientific research results.

Carry out artificial hail prevention to make it develop in the direction that people expect, so as to achieve the purpose of disaster mitigation.

When the temperature inside the cloud is below zero degrees Celsius, the cloud is composed entirely of water droplets, and when the cloud droplets grow in size, they fall into hail.

Hail (hail) is also called "hail", commonly known as hail, "bazi", and some areas are called "lengzi" (such as Xuzhou, Gansu and other places), and it is most common at the turn of summer or spring and summer. It is as small as mung beans and soybeans, and as large as ice grains such as orange chestnuts and eggs.

When the surface water is exposed to the sun and vaporized, and then rises into the air, a lot of water vapor is together, condensed into clouds, at this time the relative humidity is 100%, when it encounters cold air, it liquefies, and the dust in the air is used as a condensation nucleus, forming raindrops (tropical rain) or ice clumps (mid-latitude rain), which are getting larger and larger.

When the temperature drops to a certain level, the air is oversaturated, so it rains, if it encounters cold air without condensation nuclei, the water vapor will condense into ice or snow, that is, snow, if the temperature drops sharply, it will form a large ice mass, that is, hail.

Except for Guangdong, Hunan, Hubei, Fujian, Jiangxi and other provinces in China, which have fewer hailstorms, all parts of China are affected by hailstorms of varying degrees every year. Especially in the mountainous and hilly areas of the north, the terrain is complex, the weather is changeable, and there are many hailstorms, which are very harmful to agriculture.

Violent hailstorms often destroy crops, damage houses, and smash people and livestock. Huge hailstorms, even larger than grapefruits, can kill people, destroy vast tracts of farmland and trees, destroy buildings and vehicles, and more. It has great lethality. Hailstorm is one of the most serious disasters in China.

In the hail cloud, the strong updraft carries many large and small water droplets and ice crystals, some of which combine with the ice crystals to freeze into larger ice particles, and these particles and supercooled water droplets are transported by the updraft to the water accumulation area, which can become the hail core, and the core of the initial growth of these hail has good growth conditions in the water content accumulation area.

After the hail nucleus enters the growth zone carried by the updraft, it collides with supercooled water droplets in an area with a lot of water and a temperature that is not too low to grow into a transparent ice layer, and then goes up into a low temperature zone with less water, which is mainly composed of ice crystals, snowflakes and a small number of supercooled water droplets, and the hail core sticks and freezes with them to form an opaque ice layer.

When the hail is unable to support the growing hail, the hail falls in the updraft, and continues to grow by merging ice crystals, snowflakes and water droplets in the fall, and when it falls to a higher temperature zone, the supercooled water droplets that touch and go up form a transparent ice layer.

Hail is also called hail, commonly known as hail, and in some areas it is called cold, and it is most common in summer or at the turn of spring and summer. It is as small as mung beans and soybeans, and as large as chestnuts and eggs.

The formation of hail requires the following conditions.

There must be a rather cautious layer of instability in the atmosphere.

Curomulus clouds must develop to a height that can freeze individual large water droplets (generally thought to be temperatures up to -12 -16).

There should be strong wind shear.

The vertical thickness of the cloud cannot be less than 6 8 km.

Cumulonimbus clouds contain abundant water. Generally 3 8 g m3 with a cumulative band of liquid supercooled water above the maximum rising velocity.

There should be an oblique, strong and uneven updraft in the cloud, generally more than 10 laughing cracks for more than 20 m seconds.