How to judge whether it will rain before going out?

There are hook clouds hanging in the sky and rain dripping on the ground. "Hook cloud refers to cirrus cloud. Behind this cloud, there are often fronts (especially warm fronts), low pressure or low pressure troughs moving, which indicates that rain is coming;

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

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"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, and there is a saying that "the sky changes when the clouds go against the wind".

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"The river pig crosses the river with heavy rain": The river pig refers to the broken rain clouds under nimbostratus. The appearance of this cloud indicates that nimbostratus is full of water vapor and shanghai dawn. Sometimes broken rain clouds are blown to cloudless places by strong winds, and it is also a precursor to rain to see clouds like river pigs floating across the "Milky Way" at night.

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"Cotton cloud, rain is coming": Cotton cloud refers to flocculent cumulus clouds. The appearance of this cloud shows 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 there will be thunderstorms.

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

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"Cloud to the east, chariots and horses to; The clouds go south and the water rises; Clouds to the west, covered with hemp fiber; Clouds going north are good for drying wheat ":according to the moving direction of clouds, it is predicted that the weather will be fine, and the clouds will move east and north, indicating that the weather will be fine;" "The clouds move west and south, which indicates that it's going to rain. The moving direction of a cloud usually indicates the wind direction at its height. This proverb explains the distribution of clouds in different parts of low pressure. Suitable for low-altitude fast-moving clouds that are densely covered all day.

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"Sunset shoots at the foot, and it rains within three days": it means that the sun shines through the cracks in the clouds, which is called "shooting at the foot". The sun shooting at the foot appears in the evening, indicating strong convection and indicating rain.

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"Dark clouds catch the sunset, not today, but tomorrow": When the sun goes down, a wall-like dark cloud rises under the western horizon to catch the sun, indicating that the dark clouds are moving eastward, and the rainy weather system in the west is moving, and it is going to rain. Generally speaking, if there are clouds, it will rain that night; If you catch the high clouds, it will rain the next day. However, if the dark clouds in the west are lumpy or discontinuous, or some areas are cloudy, it is not a sign of rain in the future.

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"Long sunny, foggy and cloudy, long cloudy and foggy and sunny": refers to the appearance of fog after a long sunny day, indicating that the warm and humid airflow moves and the air is humid, which is a sign of cloudy and rainy; Fog appears after a long period of cloudy days, indicating that the clouds in the sky become thinner, split and dissipate, and the ground temperature drops, so that water vapor condenses into radiation fog. After sunrise, the fog will disappear and sunny days will appear.

The above ten points are common weather forecasts and rainfall.