Sometimes it s sunny, why does it rain?

It is not a strange thing to rain on a sunny day, the two conditions for rain, the first is to have a hot air rise, and second, there must be a condensation nucleus, and it will rain when both conditions are met, the condensation nucleus is what we commonly call cumulonimbus clouds, and sometimes it is not cloudless on a sunny day, and those heavy clouds provide indispensable conditions for rain! So sometimes it rains on sunny days! So how does it rain?

Rain is related to atmospheric circulation factors:

Rain is a natural precipitation phenomenon produced by disturbances in the atmospheric cycle, an indispensable part of the Earth's water cycle, and the only way for almost all terrestrial plants far from rivers to replenish fresh water.

Raindrops fell from the sky, big and small, fast and slow. Water evaporates on the earth's surface, rises and cools to form rain. Rain is the most important source of freshwater resources for human life.

Water droplets that rain falls from clouds, water evaporates from the surface of land and sea and becomes water vapor, and the water vapor rises to a certain height and becomes small water droplets when it is cold, and these small water droplets form clouds, which collide with each other in the clouds and merge into large water droplets, and when it is too big for the air to support, it falls from the clouds and forms rain.

Extended Materials. Rain usually comes in four forms:

1. Frontal rain (plum rain): The warm and humid airflow from the ocean meets the cold air from the land, because the cold air is heavy and the warm air is light, the warm and humid airflow is forced to rise, and when it is condensed, it forms a very long and wide rainfall belt, which is the frontal rain.

2. Convective rain: In summer, under the strong sunlight, the warm and humid air in the local area rises sharply, and condenses to form rainfall, which is convective rain, which is called "thundershower" in meteorology, and we usually call it "bursting sky", in addition, typhoon rain is also a kind of convective rain.

3. Topographic rain: The warm and humid air flow from the ocean, when it encounters mountains, is forced to rise, and when it encounters condensation, it forms rainfall.

4. Typhoon rain: The hot and humid air over the tropical ocean rotates and rises strongly on a large scale. During the rise, the temperature drops rapidly, and a large amount of water vapor condenses into clouds and rain, which is called typhoon rain.

This is the condition in which convective rain is formed, and it is rain formed by friction between clouds, causing water droplets to fall.

Because there are so many water molecules in the sky that they need to be released.

It should be the air circulation in the sky that allows the rain to fall.

This is called solar rain, and it rains when there are many droplets.

The reason for the movement of the atmosphere is to bring water vapor with it.

Solar rain is formed due to drastic changes in air pressure.

This is because the air currents interact with each other, causing the clouds to rub together and cause rain.

When clouds pile up, it rains, and it has little to do with whether it is sunny or not.

The water vapor in the air has reached a certain saturation.

It rains regardless of the season. Winter is not yet about to come out of the sun.

Why does it rain on a sunny day? Generally speaking, there are three causes of rainfall:

First, when the warm and cold air meet, the warm and moist air rises and the water vapor condenses and forms rainfall! Second, under the strong sunlight, the air forms a convection, and the warm and humid air rises sharply to condense the water vapor and form rain! The third is that when warm and moist air meets terrain such as mountain slopes, it is forced to rise and cause water vapor to condense and form rainfall!

When these three situations are encountered, there will be sunny days and rainfall!

1. Rain on a sunny day is a trick of high-air air flow. It can pass through the rainy areas in the sky, blow the raindrops to a place where there are no clouds, and then fall, so that the phenomenon of rain on a sunny day is formed. 2. In summer, sometimes the sky is cloudless and the sun is shining, but suddenly there are showers of rain, we call this kind of rain summer showers.

Sometimes it is a strong wind that blows the rain from the distant clouds, and we can't see the clouds but only see the rain. Sometimes showers come from clouds high in the sky, and the clouds dissipate before the rain hits the ground. Of course, the scope of summer showers is small, and sometimes there is only a small cloud in the sky.3 In fact, when it rains, there are still clouds.

Some sun rain is caused by dark clouds in the distance, which are blown to another place by strong winds. Some of them have a sudden change in the weather and start to rain, and the rain that falls from high altitudes has disappeared before it has landed, so the weather looks good.

The phenomenon of rain on a sunny day is called solar rain or summer showers. Rain on a sunny day is air flow fusion. Pass through the rain zone in the sky, blow the raindrops to a place where there are no clouds, and then fall.

In the summer, the sky is cloudless and the sun is shining, but suddenly there is a torrential rain, and it is a strong wind that blows the rain from the clouds in the distance.

When it rains, how do these small droplets grow their size to more than 1 million times?

It mainly relies on two means: one is the condensation and condensation increase, and the other is the collision and increase of cloud droplets. 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 water and gas energy sources in the cloud are constantly replenished and the surface of the cloud droplets is often supersaturated, then this condensation process will continue, causing the cloud droplets to grow 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, as the size and weight of the large droplets increase, they will not only catch up with the slower small droplets in the process of descending, but will also swallow up more of the smaller 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.

Most of this phenomenon occurs in the summer, sometimes the sky is cloudless and the sun is shining, but suddenly there are showers of rain, we call this kind of rain summer showers. Sometimes it is a strong wind that blows the rain from the distant clouds, we can't see the clouds and only see the rain, sometimes the showers come from the clouds in the sky, and the clouds have dissipated before the rain falls to the ground, of course, the scope of the summer showers is small, sometimes there is only a small cloud in the sky, and it does not cover the sun, but it is just above our heads, and there will be a sudden heavy rain, sometimes there are many clouds in the sky, but it does not rain, and after a while they all dissipate, which is not surprising, Because clouds don't have to turn into rain to dissipate, often because the wind in the air blows the clouds down, and the temperature at the lower altitude is relatively high, and the clouds turn into water vapor when they are heated, so we can't see them.

Rain on a sunny day is sun rain, which is a natural phenomenon. No fuss.

The environment has always been an important factor in determining the survival of human beings, and only a certain suitable environment can human beings get better survival and development. Weather is also closely related to human life, because the weather is closely related to agriculture, and agriculture is closely related to human beings, so the solar terms of the four seasons are also very important for agriculture. In this weather environment, there will be snowfall, rain, wind, and so on.

Conditions of rainfallIn natural society, rainfall requires certain conditions, such as: temperature, updrafts with certain conditions, humidity with certain conditions, and some dust, etc. But there is no sun-related factor in the conditions of rainfall.

Therefore, the occurrence of rain has nothing to do with the size of the sun, we may encounter a big sun when it rains, or we may encounter a situation where the sky is cloudy and the sun cannot be seen when it rains, these are normal situations. Because when you can't see the sun, it's only because of the atmosphere.

There are more clouds that obscure the sun, so we can't see the sun on the ground. <> sun rain. It is a special natural phenomenon.

It is a local sudden drop in air temperature and water molecules in the air.

Condenses into water vapor.

Precipitation is formed by falling. Many people like to see the sun rain because they think it is a symbol of happiness. The sun and rain do not give people a dull feeling like a rainy day, and it will make the whole person's body feel uncomfortable.

Well, do you like this kind of solar rain, and do you know anything else about solar rain? <>

Many times we will see the sun rain. Although the sun is out, the small raindrops that have gathered in the clouds have not yet fallen, so this phenomenon occurs. This is a very normal weather phenomenon.

Because the appearance of rainfall has nothing to do with the size of the sun, in the case of suitable temperature and humidity, such as updrafts under certain conditions, humidity and dust under certain conditions will form rainfall, and the water molecules in the air will condense into water vapor when the conditions are ripe, and rain will be formed when they fall.

Because there are a lot of clouds in the sky, the pressure of these clouds is very high, so it will rain under the action of gravity.