Clouds are like signs of weather. What do the symbols in the clouds mean?

The word "signboard" is figurative here. The original meaning refers to the sign hanging in front of the store to indicate the name of the store or the goods sold. As a symbol of the store, it is used here to vividly illustrate the close relationship between clouds and weather.

Seeing the weather from the clouds is a popular science article. The author introduces the relationship between clouds and weather in logical order from two aspects with vivid language: the relationship between different forms of clouds and weather; The relationship between different glorious clouds and the weather. Structurally, the whole paper adopts the relationship of total-subtotal.

Extended data

cloud formation

Cloud is a visible polymer suspended in the atmosphere, which consists of a large number of tiny water droplets, ice crystals and dust. Generally, if you don't touch the ground, it's called fog. Because the atmospheric pressure decreases with the increase of height, the air will expand and cool down when it rises, and the saturated water pressure will also decrease. When the water in the air reaches saturation and condenses into a large number of tiny water droplets floating in the air, clouds are formed.

Generally, thin clouds in the sky are often a symbol of fine weather; Those low and thick clouds are usually signs of rain and snow. See small round clouds piled up one by one, like ripples, people call it fish-scale sky, and the meteorological term is cirrocumulus, which indicates that the clear blue sky is about to show in front of people. Similar to cirrocumulus, cumulus clouds also indicate good weather, but it has a wider range and thicker clouds.