What kind of clouds are the clouds before the rainstorm? 30

Clouds before a rainstorm are generally classified as cumulonimbus.

and Nimbostratus. Cumulonimbus clouds: low-level thunderclouds with dark clouds. Tower-shaped clouds can reach heights of up to 6,000 metres, and the flat cloud layer at the top is called the anvil top. Cumulonimbus clouds often bring strong storms, thunder and lightning. The upper layer resembles a false cirrus cloud.

The top layer resembles a false rain cloud.

Nimbostratus: Low-lying dark clouds that shroud the air, meaning that there will be rain within 4 hours, usually for a few hours.

The characteristics of other clouds are as follows:

Cirrocumulus. Cumulus massifolius, which looks like a ripple, is often referred to as "ichthyoses" and is usually at an altitude of elevation.

5,000 8,000 m, generally foreshadowing sunny weather.

Altocumulus. Similar to Cirrocumulus, it portends good weather, but it has a wider coverage, thicker clouds, and white and dark clouds. It usually occurs after a heavy rainstorm and is suspended at an altitude of 5,000 to 6,000 metres.

Cumulus clouds: easily recognizable, fluffy white clouds, like clumps of cotton wool, floating in the air. If you are separated from each other, it means that it is a beautiful sunny day, but if it grows bigger and bigger, and there are more and more fronts, it is likely to bring a sudden rainstorm.

Cumulus clouds located in the blue sky over the sea usually indicate that they are not far from land, and the height is generally not more than 2,500 metres.

Cirrus: A high-level wisp cloud formed by ice crystals, which is why it looks pure white, often called a horsetail cloud. They also usually mean clear weather, 5 000 9 000 meters high.

Cirrostratus: Formed by ice particles that look like white clouds, these are the only clouds that create a halo around the sun or moon. If Cirrostratus expands, it means that the weather is clear; If the cirrostratus clouds shrink, it means that it is going to rain; If the sky is shrouded in cirrus clouds, the sky above the cirrus clouds darkens and cirrocumulus clouds gradually form, which signals the arrival of rain and snow.

Altostratus: Looks like a gray curtain when illuminated by sunlight or moonlight. If moist air is near, cloud disks.

disappears, and the clouds thicken and darken until it rains, reaching heights of 2,500,6,000 metres.

Stratocumulus. The lower layers are covered with shingle-like clouds, which usually cover the entire sky. The clouds are thin and sunlight can pass through. They can bring thundershowers.

But it usually disappears in the early afternoon, leaving behind a clear and bright blue sky. The height is less than 2,500 meters.

Stratus: The lowest level of clouds hangs in the sky like a thick fog, which is often mistaken for a dense mountain fog when it first appears. They are not very natural rain clouds, but they can also form misty drizzles.

If at night it is thicker and thicker, covering the early morning sky, usually it will be a clear day, the height does not exceed 2,500 meters.

Cumulonimbus cloudsAlso called thunderstorm clouds, they are a type of cumulinous clouds. Cumulus clouds are formed by adiabatic cooling caused by convective movement of air, which saturates and condenses water vapor, including Cumulus pallimatus, Cumulus congestus, Cumulonimbus and Cumulus fractus.

The cumulonimbus clouds are thick and thick, and the clouds are as large as towering mountains, in the shape of steamed buns, and there are updrafts in them, making them look like steamed buns with flat bottoms and protrusions. Cumulonimbus clouds often produce thunderstorms, showers (snow), or drooping rain (snow). Sometimes squall or hail falls.

Occasional tornadoes occur at the base of clouds.

There are 3 necessary conditions for the formation of cumulonimbus clouds:

1. A large amount of unstable energy. To produce convective weather, first of all, the atmosphere is unstable, and in the atmosphere where a large amount of unstable energy is stored, once it is subjected to enough impact, the unstable energy will be released and become the kinetic energy of the upward movement of the air.

2. Sufficient moisture. Abundant water vapor is also necessary for the formation of thunderstorms, and without abundant water vapor, it is impossible to produce tall thunderstorm clouds, even if convection occurs. As a result, thunderstorm clouds tend to occur at times or areas where there is plenty of moisture.

3. Sufficient impact. The presence of unstable energy and water vapor in the atmosphere makes thunderstorms possible. For this to become a reality, there needs to be enough force to cause the air to rise above the height of the free convection, so that the unstable energy can be released and the updraft can develop strongly to form thunderstorm clouds.

Dark clouds. Black clouds.

The black clouds crushed the city and wanted to destroy it, and the armor light opened to the sun.

The black clouds turned over the ink and did not cover the mountains, and the white rain jumped into the boat.

The clouds before the rain are dark clouds.

Generally speaking, there are more dark clouds at this time.

Cirrocumulus clouds appear in the sky.

Cirrus clouds, indicating rain.

1. Cirrocumulus:

Cirrocumulus is a type of cloud that is small and white without a shadow at an altitude of about 5,500 meters.

It is a cloud sheet or cloud layer composed of small white wavy scales or spherical clouds, often arranged in rows or groups, much like small ripples caused by a breeze blowing across the water. If the distribution of clouds in the sky is dominated by cirrocumulus, it usually indicates unstable rainy and windy weather. The agricultural proverb "fish scales the sky, no rain and the wind is turbulent" refers to such a cloudy day.

2. Cirrus uncinata.

Hook the clouds in the sky, rain on the ground" is a common folk proverb, and the "hook hook cloud" in this proverb is in meteorology.

It is called Cirrus uncinata, which is usually in the troposphere at an altitude of 1,000 meters.

Appear, the cloud is very thin and white, and the filaments are often arranged in parallel, with small hooks or clusters at the upper end and a long trail below, much like a comma symbol. This type of cloud often has a front behind it, and when it systematically moves into the sky and continues to develop, windy and rainy weather phenomena are common.

There are a lot of raindrops in the clouds. When the air flow rises and the lift force of the raindrops exceeds the gravitational force of the raindrops, the raindrops will be thrown upwards, resulting in the phenomenon of rain in a cloudless sky.

There are many strange rain phenomena in nature that rain without clouds. In Paraguay, South America, the Paraná River region, near the border with Vicha Brazil, often has clear skies, and although the sky is cloudless, there is never stop raining. It turns out that the endless rain comes from an inexhaustible source of water:

Near the Paraná River, there is a famous Guairah Waterfall, the splash of the waterfall forms a mist, which is blown by the wind to the valley and then descends into the wilderness, forming an endless rain thread that is famous for the mountain. However, some of the cloudless and rainy phenomena remain a mystery to this day.

Clouds rain through condensation and condensation. In the early stage of raindrop formation, the cloud droplets mainly rely on the continuous absorption of water vapor around the cloud body to condense themselves and condense the tung tree. If the water vapor energy source in the cloud is continuously replenished and replenished, so that the surface of the cloud droplet is often in a supersaturated state, this condensation process will continue, so that the cloud droplet will continue to increase and become raindrops.

There is water vapor in the clouds, which condenses into rain when encountering convection.

Clouds rain through condensation and condensation. In the early stage of the formation of raindrops, the cloud droplets mainly rely on continuously absorbing the water vapor of the four dusts of the cloud body to condense and condense themselves. If the water vapor energy source in the cloud is continuously replenished and replenished, so that the surface of the cloud droplet is often in a supersaturated state, this condensation process will continue, so that the cloud droplet will continue to increase and become raindrops.

Clouds rain through condensation and condensation. In the early stages of raindrop formation, cloud droplets mainly rely on the continuous absorption of water vapor around the cloud body to condense and condense themselves. If the poor water and gas energy sources in the cloud are constantly replenished and replenished, so that the surface of the cloud droplets is often in a supersaturated state, then this condensation process will continue, so that the cloud droplets continue to increase and become raindrops.

However, sometimes the amount of water vapor in the cloud is limited, and in the same cloud, the water vapor is often in short supply, so that it is impossible to make each cloud drop increase into a larger raindrop, and some smaller cloud droplets have to be merged into the larger cloud droplets. If water droplets and ice crystals coexist in the cloud, the process of condensation and bloom increase will be greatly accelerated. When the droplets in the cloud increase to a certain extent, due to the increasing size and weight of the large droplets, they will not only catch up with the slower small droplets in the process of descending, but will also "swallow" more small droplets and make themselves stronger.

When the large cloud droplets grow larger and larger, and finally the air can no longer support them, they fall straight from the clouds to the ground, and it becomes the common rain of people.

The presence of cirrocumulus, castle clouds, cotton clouds, and gray cloth clouds indicates that it is going to rain.

Cirrocumulus: Cirrocumulus is a kind of cloud, about 5500 meters above sea level, the cloud is very small, white and shadowless, Li Rang is a cloud sheet or cloud layer composed of white fine wave scales or spherical fine cloud blocks, often arranged in rows or groups, much like small ripples caused by a breeze blowing through the water surface.

White with no shadow and a silky sheen. The clouds are very thin, can penetrate the sun and moonlight, and are white without darkness, and at night they are gray-black, almost entirely composed of ice crystals.

The formation process of Cirrocumulus clouds:

Cirrocumulus can evolve from Cirrus clouds and Cirrostratus clouds. Sometimes Altocumulus can also evolve into Cirrocumulus. The clouds are small, white and fine-scaled, flake-like, often in rows or groups, arranged in a neat manner, like small ripples caused by a breeze blowing across the water. Cirrocumulus has only 1 category.

In addition, every type of cloud has its peculiarities, but they are not set in stone. Under certain conditions, one cloud can be transformed into another, and one cloud can be transformed into another. For example, Cumulus pailus can develop into Cumulus congestus and then into Cumulonimbus. The top of the Cumulonimbus cloud detached to become pseudocirrus or Altocumulus cumulus; Cirrocumulus reduced to Stratus hyperkey; Altostratus lowers and becomes Nimbostratus.

Another process of formation of Cirrocumulus may be under the action of strong air currents, the sandwich Altocumulus rises to the high altitude and becomes Cirrocumulus.

Effect of Cirrocumulus:

If the distribution of clouds in the sky is dominated by Cirrocumulus clouds, which are related to Cirrus clouds and Cirrostratus clouds, interact with each other, and develop systematically, it usually indicates that there will be an unstable weather system affecting the station, and there will be rainy and windy weather. The agricultural proverb "fish scales the sky, no rain and the wind is turbulent" refers to such a cloudy day.

Usually Nimbostratus or Cumulus stratocumulus or Altostratus occultus. Summer cumulonimbus clouds also rain, with heavy downpours accompanied by thunder and lightning.

When the weather changes, it is estimated that it will rain when there are dark clouds overhead.

Cumulonimbus clouds (black clouds) are more likely to rain.