Why are there dark clouds before it rains, and why are there dark clouds before rain

Where there are clouds, there is rain. Why? Because in the atmosphere, rain is contained in clouds, and the main body of clouds is raindrops.

So why don't clouds with white or light colors generally don't rain, and why do the darker the clouds, the heavier the rain? Whether it rains or not depends on the amount of raindrops in the clouds. The heavier the rain, the more raindrops are bound to be in the clouds.

Herein lies the problem. We know that water droplets and the impurities in them can absorb, refract and reflect sunlight. The larger and thicker the cloud, the better it can absorb and emit sunlight.

In this way, there is less sunlight hitting the ground, and the sky is naturally "black" when viewed from the ground.

But when viewed from outside the atmosphere, in space, the whiter the clouds, the heavier the rain. The principle is the same as above, and I think slowly.

It rains because of dark clouds.

Clouds are produced by the condensation of small water droplets.

The more small droplets, the thicker the clouds.

After it condenses dust particles, it becomes dirty.

Then it's a dark cloud, hehe.

Then the small droplets are more concentrated.

When the air currents can't hold up, they fall to the ground.

It's rain.

It's because the clouds are so thick that they block out the sun, and if there is no sunlight, of course it will become very dark!

It rains only when there are dark clouds (clouds with a lot of water).

Clouds are formed by rain.

If it is formed too much, it will turn into rain and rain.

Dark clouds are the premise of rain, and there is no rain without dark clouds!

Because there is rain after the clouds.

The condition for the formation of rainfall is the presence of rain clouds.

How can it rain without clouds.

And it was out of that dark cloud that the rain came.

It does not necessarily rain when there are dark clouds, but when the clouds accumulate to a certain thickness and weight, it will rain. 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 continuously replenished and the surface of the cloud droplets is often supersaturated, this condensation process will continue, making the cloud droplets continue to grow and become raindrops.

In summer, surface water evaporates rapidly under the scorching sun, making the air humid and humid. The temperature at high altitude is lower than the surface temperature, so water vapor first reaches saturation and supersaturation at high altitude. There will always be some dust in the high altitude, which becomes the center of condensation, causing the saturated steam and supersaturated steam to condense into fine droplets. When the droplets are dense enough, they become white clouds visible to the naked eye. The droplets grew larger and larger, and the white clouds turned into dark clouds.

The droplets in the clouds continue to grow in size and become raindrops. After the rain, the humidity of the air decreases, the water vapor returns to an unsaturated state, and the small water droplets in the dark clouds begin to evaporate and become smaller and smaller, so that the dark clouds become white clouds. The fog droplets in the white clouds continue to evaporate, and once they are all vaporized, the white clouds disappear and the blue sky is revealed.

Because the raindrops are the drops of water that fall from the dark clouds. The clouds floating in the sky are actually water droplets that gather in the sky when water vapor condenses, and when the water droplets get bigger and denser, the white clouds will become dark clouds. As the weight of the water droplets in the clouds continues to increase, they become raindrops that fall from the sky to the ground.

Water on the surface of land and ocean evaporates and turns into water vapor, which rises and cools into small droplets, and finally clouds.

The small water droplets and Xiaoice crystals in the clouds will constantly move, collide with each other, and merge into larger and heavier water droplets.

People describe clouds as erratic, and the most difficult thing to judge is whether it will rain if there are dark clouds. If it weren't for the weather forecast, it would be difficult for the staff to make a judgment.

Dark clouds usually signal impending rain, but sometimes it does happen when there are clouds but no rain, which can be caused by:

1.The rainy season has not yet arrived: In some areas, the rainy season may not have started yet, despite the dark clouds. In this case, the clouds may simply be a sign that the rainy season is coming, but it is not actually raining immediately.

2.Thin clouds: Sometimes clouds appear thick, but in reality they are just made up of thinner layers of clouds. In this case, although the clouds are thick, the clouds may not have formed enough rain conditions due to the thin clouds. Chiluki.

3.Wind direction and speed: Wind plays an important role in the formation of rainfall. If the wind speed is not fast enough or the wind direction is not right, it will not be able to form a strong enough updraft, which may prevent water droplets from falling in the clouds, thus preventing rainfall.

4.Influence of weather systems: Sometimes, weather systems may bring a lot of water vapour, but the water vapour transport and pressure field may not be sufficiently adjusted to cause sufficient rainfall, although there is a lot of water vapour.

Overall, while dark clouds usually signal impending rain, there are a number of factors that can influence the exact rainfall pattern. In practice, it is necessary to comprehensively consider factors such as weather forecasts, meteorological conditions and specific geographical environments in order to make more accurate rainfall.

Because there are droplets of fog in the clouds.

Dark clouds are clouds that change color after the fog droplets condensed by saturated steam and supersaturated steam in white clouds become larger and larger. In summer, surface water evaporates rapidly under the scorching sun, making the air humid and humid. The temperature at high altitude is lower than the surface temperature, so water vapor first reaches saturation and supersaturation at high altitude.

There will always be some dust in the high altitude, which becomes the center of condensation, causing the saturated steam and supersaturated steam to condense into fine droplets. When the droplets are dense enough, they become white clouds visible to the naked eye. The droplets grew larger and larger, and the white clouds turned into dark clouds.

Features:

There are many types of dark clouds, such as stratiform clouds that fill the sky, isolated cumuliform clouds, and undulating clouds. Very thick stratiform clouds, or cumulonimbus clouds, where the light of the sun and moon is difficult to penetrate, and the clouds appear very dark; The slightly thinner stratiform and undulating clouds appear gray, especially the undulating clouds, with more grayish colors at the edges of the clouds.

The small droplets in the dark clouds begin to evaporate and become smaller and smaller, so that the clouds become white clouds; The fog droplets in the white clouds continue to evaporate, and once they are all vaporized, the white clouds disappear and the blue sky is revealed.

At sunrise and sunset, because the sun's rays are obliquely shining through the thick atmosphere, the air molecules, water vapor and impurities scatter a large number of short-wave parts.

However, the red and orange long-wave parts are not scattered much, so when they reach the lower atmosphere, the long-wave light, especially the red light, accounts for the absolute majority, and not only the sky in the sunrise and sunset directions is red, but even the bottom and edges of the clouds illuminated by it also turn red.

Because the dark clouds are composed of water droplets, ice crystals, and a mixture of the two, the light of the sun and the moon will also cause various beautiful halos or rainbows when they pass through.

The above content refers to Encyclopedia - Dark Clouds.

Dark clouds are the first of rain, and when dark clouds accumulate to a certain thickness and weight, rain is formed. In the early stage of raindrop formation, the cloud droplets mainly rely on continuously absorbing the water vapor around the cloud body to condense and condense themselves, so that the surface of the cloud droplets is often in a supersaturated state, so that the cloud droplets continue to increase and become raindrops.

Why are there dark clouds before the rain

It does not necessarily rain when there are dark clouds, but when the clouds accumulate to a certain thickness and weight, it will rain.

When the droplets are dense enough, they become white clouds visible to the naked eye. The droplets grew larger and larger, and the white clouds turned into dark clouds.

After the rain, the humidity of the air becomes smaller, the water vapor returns to an unsaturated state, and the small water droplets in the dark clouds begin to evaporate, and the volume becomes smaller and smaller, so that the dark clouds become white clouds.