How to judge the weather according to the type of cloud

Meteorologists divide clouds into four types (called families), and each type includes several kinds of clouds (called genera). One is four families and ten genera; Direct spread clouds, including cumulus clouds and cumulonimbus clouds; Low clouds, including stratocumulus, stratocumulus and nimbostratus; Medium clouds, including high accumulation fat clouds and high-level clouds; High clouds, including Cirrus, cirrostratus and cirrocumulus. Among them, the rainfall clouds are mainly straight clouds and low clouds. The two main types of rain clouds are cumulonimbus and nimbostratus.

The bottom of the cumulonimbus cloud is several hundred meters to one or two kilometers from the ground, but the upper part is relatively high, which can reach several kilometers or even higher. The clouds are tall and drill-shaped, and there are lightning and thunder in the clouds. This kind of cloud will bring heavy rain to some areas, sometimes violent storms, and sometimes hail.

At the bottom of nimbostratus, 2 kilometers from the ground, the clouds are thick, even and gloomy. People often say that "the sky is dark and the clouds are low", which refers to this kind of cloud. When nimbostratus appeared, the rainfall was generally even, but it was long and wide.

It is unlikely that it will rain in the middle and high clouds. Even if it rains, there will be no heavy rain. But this is usually a sign of weather change. For example, when cirrostratus appeared, high-level clouds and nimbostratus often followed. So the appearance of cirrostratus often indicates that it will rain soon.

If you are familiar with the shape and nature of clouds and master the relationship between clouds and weather, you can know the weather from clouds.

Cirrocumulus is like a scale wave. Will not bring rain and snow.

Cumulus clouds reflect the mild sunlight in the sky like cotton balls.

The cumulus clouds show blue sky like sheep clouds.

Cirrostratus is like a white silk curtain. It will move forward and the weather will turn cloudy.

High clouds are like ground glass, which indicates rain or snow.

Nimbostratus is full of sky, and continuous rain and snow will begin to fall.

Rain clouds form a high Yunshan, and it will rain heavily soon.

In addition, clouds with weather omen often have certain continuity, seasonality and locality in the evolution process. Clouds in the sky move from a distance in the order of cirrus, cirrostratus high-level clouds and nimbostratus, and gradually change from less to more, from high to low, from thin to thick, indicating that rainy weather is coming; On the contrary, if the clouds change from low to high, from thick to thin, and from layered clouds to scattered clouds, there will be no rainy weather. In the warm season morning, if there are isolated clouds (light cumulus clouds) with flat bottom and convex top in the sky, or white broken clouds (broken cumulus clouds) that move quickly, it indicates that the air in the middle and lower layers is relatively stable and the weather is fine.

In addition, the color of clouds can also indicate some kind of weather. For example, the color of hail cloud is first white and then black, and then red appears in the cloud, forming a white, black and red distorted cloud with khaki edges. Black is caused by the sun's inability to penetrate clouds; White is the result of non-selective scattering or reflection of sunlight by clouds; Red and yellow are the phenomena that some cloud droplets (ranging from one thousandth to one hundredth of a millimeter in diameter) in the cloud selectively scatter sunlight. Sometimes rain clouds are pale yellow, but the color of the clouds is uniform and will not stir. There are also many proverbs that predict hail from the color and shape of clouds. For example, there is a proverb in Inner Mongolia, such as "I am not afraid of the darkness in the clouds, but I am afraid of the red darkness in the clouds, and I am most afraid of the white worms under Huang Yun". In Shaanxi, there is "Huang Yun turned over and hail; Stir clouds and hail in groups; There are proverbs such as "When clouds fight, it will hail" and "When the dark clouds in Huang Yun are red, they will be stirred repeatedly, and many hail disasters are serious".