Why do hailstones appear in the summer, and why do hailstones always appear in the summer?

The reasons for this are as follows

In summer, the weather is hot, and the sun bakes the earth, which is prone to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly and the temperature drops rapidly, sometimes as low as -3. The water vapor in the hot air condenses into water droplets when it hits the cold air and quickly freezes to form Xiaoice beads.

The Xiaoice beads tumbled up and down in the clouds, constantly absorbing and condensing the surrounding water droplets into ice, becoming heavier and heavier, and finally smashed down from the sky, which is hail.

The reason why hail always occurs in summer: According to reports, experts from the Meteorological Observatory explained that hail is a kind of disastrous weather in spring and summer, and it is also a type of strong convective weather, although the probability of occurrence is much smaller than that of thunder, lightning, strong winds, short-term heavy rainfall, etc., but it is also normal.

Although the summer temperature is high, the temperature at the top is still below zero, and the hot air with a large amount of water vapor quickly rises to the sky, and the cooling turns into water droplets and then ice droplets. Hail is produced in the process of convective movement formed by cumulonimbus clouds and strong air, and the air is relatively stable in winter, and the "air flow difference" between the upper and lower levels is not as large as in summer, and the vertical convective movement of air is not as strong as in summer, so it is not easy to form hail.

In summer, the sun is exposed, the ground temperature is very high, and the factors of water evaporation are, first, the area of surface water is broad, second, the temperature is high, and third, the air above the water surface flows fast, and at least the first two conditions should be met, so a large amount of water vapor is evaporated, and its density is small, so it rises rapidly to the high altitude.

Hail is commonly known as hailstone. They are most commonly found in summer or at the turn of spring and summer. They are ice particles as small as mung beans or soybeans and as large as chestnuts or eggs.

Extra-large hailstones are larger than grapefruits. Except for Guangdong, Hunan, Hubei, Fujian, Jiangxi and other provinces, China has fewer hailstorms, and all regions suffer from hail disasters of varying degrees every year.

Especially in the mountainous and hilly areas of the north, the terrain is complex, the weather is changeable, there are many hailstorms, and the damage is serious, which is extremely harmful to agriculture. Violent hailstorms destroyed crops, destroyed houses, injured people, killed livestock. Therefore, hail is one of the serious disasters in our country, how is hail formed?

What is its structure? How to prevent hail disasters.

Hail Introduction Hail is a kind of ice or ice lump falling from a strong cumulonimbus cloud (also known as a hail cloud), according to its size, hardness and structure, it is often called "hail", hail from the hail cloud falling to the ground can be roughly divided into the following four types: Hail: ice with a diameter greater than 5mm, relatively hard, will ** when falling; Each hail block is made up of an opaque ice core alternately and a transparent and opaque layer of ice outside the ice core.

This is the most dangerous hailstorm.

Soft hail: loose structure, light weight, easy to break on the ground, this kind of hail is called soft hail. This hail is not very harmful.

Soft hail usually occurs at high latitudes or in highland areas. It is believed that hail in the clouds sometimes turns into soft hail due to the influence of high altitudes. Summers are hot.

The sun sheates the earth too hot, and it is easy to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly, and the temperature drops dramatically, sometimes even to -30. Water vapor in the hot air condenses into water droplets when cold and quickly freezes to form Xiaoice droplets.

Xiaoice beads roll up and down in the clouds, constantly adhering and condensing the surrounding water droplets into ice, becoming heavier and heavier, and finally falling from the sky, which is hail. So only in the summer will there be hail.

This is due to the fact that the climatic conditions for the formation of hail can only be met in summer.

Hail is formed by cumulonimbus clouds, and the formation of cumulonimbus clouds needs to meet three conditions: first, there must be a large amount of unstable energy to produce convective weather; second, there must be sufficient water vapor; The third is that there is enough shock, and the afternoon temperature in summer is very high, so there is often a strong air flow rising, so these conditions determine that cumulonimbus clouds can only appear in summer.

Conditions for the formation of hailstones:

1. There should be strong wind shear.

2. There must be a fairly thick layer of instability in the atmosphere.

3. Cumulonimbus clouds must develop to a temperature that can freeze individual large water droplets (generally considered to be -12 -16).

4. The vertical thickness of the cloud should not be less than 6 8 km.

5. Cumulonimbus clouds have abundant water content. Generally 3 8 grams per cubic meter, above the maximum rising velocity there is an accumulation zone of liquid supercooled water.

6. There should be an oblique, strong and uneven updraft in the cloud, generally above 10 20 m sec.

Hail is only possible during thunderstorm conditions in summer.

It is caused by the rising air flow caused by the thermal radiation of the sun.

Hail is a disease caused by air cooling and condensation in a short period of time, and gradually accumulates and expands.

In summer, when the sun bakes the earth hot, it is easy to produce a lot of hot and humid air near the ground. Hot and humid air rises rapidly and the temperature drops sharply, sometimes as low as -30. The water vapor in the hot air condenses into water droplets and quickly freezes to form Xiaoice beads.

Xiaoice beads tumble up and down in the clouds, constantly sticking and condensing the surrounding water droplets into ice, becoming heavier and heavier, and finally falling from the sky, which is hail. That's why hail only happens in summer.

Hail is formed by cumulonimbus clouds, and the formation of cumulonimbus clouds needs to meet three conditions: first, there must be a large amount of unstable energy to produce convective weather; second, there must be sufficient water vapor; The third is that there is enough impact, the temperature is very high in summer, and there is often a strong air flow rising, so these conditions determine that hail can only occur in summer, understand? ╮(

Hail is not only seen in summer, but only in summer. Hail has a strong seasonality, with warm air active in summer and cold air activity frequent, and hail is prone to occur. Hail is more common in the evening because of the strong convective effect during this time.

First of all, you have to know why hail falls in the sky, simply put, due to the low temperature in the sky, the particles suspended in the air absorb the moisture in the clouds, so that the particles continue to increase, in the process of falling, if the temperature plummets these particles become Xiaoice crystals, this Xiaoice crystals are hail.

The updraft has no way to send it back into the air before it falls to the ground, which is hail. In other seasons, the temperature is low and the air does not have much convection capacity, so hail weather generally does not occur.

First of all, the following three conditions must be met.

1. There should be a fairly thick unstable layer in the atmosphere (in fact, the clouds inside should be thick enough, and the thickness should not be less than 6 km to 8 km).

2. It needs to be a cumulonimbus cloud (there is water to form hail. ）

3. There needs to be a strong air convective movement.

I won't go into other details, there are many detailed instructions on the Internet.

Let's just say why it hails in the summer and not in the winter.

Because the winter is cold, there is not so much unstable convection, and it does not get hot and cold.

So, since there will be no strong air convection, the water in the cumulonimbus clouds will either change to rain or snow. Under normal circumstances, it does not hail.

Hail is the ice particles that fall from the sky, the ice attack block, its grains.

The diameter is generally 5-10 mm, and the largest particle size recorded in the literature can reach more than 300 mm. Hail from the sky can cause great damage to houses, people, livestock, crops, etc., and form a disaster. Hail is a product of convective weather, formed in thick and strong cumulonimbus clouds, and meteorologically said to be deep stratification without concealment.

Because the temperature is relatively high in summer, there is a lot of warm and humid air, and once a cumulonimbus cloud is formed, it is very easy to cause a strong version.

The convection, the warm and humid air on the ground, can be transported to an altitude of 8000 meters above sea level, after the warm and humid air rises to an altitude of 8000 meters above sea level, it is easier to form hail when it encounters a low temperature of minus 20, therefore, in the hot summer afternoon, when encountering cumulonimbus clouds, it is most likely to form hail, do you see what I said right?

Because when it rains, there can be no hugs, and when it doesn't rain, can there be hail on a snowy day?

Because it's hot in the summer, I wear less, so I'll play haha.

In summer, the surface water is exposed to the sun and vaporized, and then rises into the air, a lot of water vapor together, condensed into clouds, at this time the relative humidity is 100%, when it encounters cold air, it is liquefied, and the dust in the air is used as a condensation nucleus, forming raindrops or ice crystals, which is getting bigger and bigger, when the temperature drops to a certain extent, the water vapor of the air is supersaturated, so it rains, if it encounters cold air and there is no condensation nucleus, the water vapor will condense into ice or snow, that is, it will snow, if the temperature drops sharply, This will form larger ice masses, also known as hailstones.