Seeing the Weather from Clouds introduces eight kinds of clouds in the first person, and writes the relationship between morphological characteristics and weather.

1, Cumulus: It is easy to identify, fluffy white clouds, like floc, floating in the air. If we are separated, it will mean another beautiful sunny day, but if it gets bigger and bigger and there are more and more front ends, it is likely to bring a sudden rainstorm. Cumulus clouds in the blue sky at sea usually indicate that they are not far from land, and the height is generally not more than 2500 meters.

2. Cirrus cloud: a high-level bunchy cloud formed by ice crystals, which is why it looks pure white, and is often called ponytail cloud. They usually mean sunny weather, 5000-9000 meters high.

3. "Hook cloud in the sky, rain on the ground": Hook cloud is called hook cloud in meteorology, and generally appears in front of warm front and low pressure, indicating that front or low pressure is coming, which is a harbinger of rain. But after rain or winter, there will be sunny days or frost, so there is a proverb that "the hook cloud dissipates, the sunny day is dry" and "the winter hook cloud dries up"

4. "Battery cloud, rain": Battery cloud refers to fort-shaped altocumulus or fort-shaped stratocumulus, which mostly appears in front of the trough of low pressure, indicating that the air is unstable, and thunderstorms usually come every 8~ 10 hours.

"Clouds pass through clouds, and it rains": Clouds pass through clouds, which means that the moving directions of the upper and lower clouds are inconsistent, that is to say, the height and wind direction of clouds are inconsistent, which often occurs near the front or low pressure, so it indicates rain, and sometimes the wind direction of clouds is opposite to the ground, so there is a saying that "the sky changes when the clouds go against the wind".

5. "The river pig crossed the river and it rained cats and dogs": The river pig refers to the broken rain clouds in nimbostratus. The appearance of this cloud indicates that there is enough water vapor in nimbostratus, and a rainstorm is coming. Sometimes broken rain clouds will be blown to cloudless places by strong winds on sunny days, and at night, clouds like river pigs will be seen floating across the "Galaxy", which is also a precursor to rain.

6. "Cotton cloud, rain is coming": Cotton cloud refers to flocculent cumulus clouds. The appearance of such clouds indicates that the middle atmosphere is very unstable. If there is enough water vapor in the air and there is upward movement, cumulonimbus clouds will form and thunderstorms will come.

7. "Gray cloth hangs in the sky, and the rain will continue": The gray cloth cloud refers to nimbostratus, which is mostly formed by thickening and metamorphosing high-level clouds, with a large and thick range and sufficient water vapor in the clouds, which often produces continuous precipitation.

8. "The northwest sky is unlocked, and the sun shines brightly": it means that on rainy days, the clouds in the northwest direction crack and reveal a blue sky, which is called "the sky is unlocked". This shows that the local area is already at the back of the rainy weather system. As the rainfall system moves eastward, the local rainfall will stop and the weather will improve.