How to judge whether it will rain by looking at the clouds?

Hook cloud is called hook cloud in meteorology, which generally appears in front of warm front and low pressure. The appearance of hook clouds indicates that a front or low pressure is coming, which is a precursor to 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" ?

Clouds meet and it's raining.

Cloud-to-cloud means that the moving directions of the upper and lower clouds are inconsistent, that is to say, the height and wind direction of the clouds are inconsistent, which often occurs near the front or low pressure, so it indicates rain, and sometimes the wind direction of the clouds is opposite to the ground, so there is a saying that "the sky will change against the wind."

The pig crossed the river and it rained cats and dogs.

The river pig refers to the broken rain clouds falling in nimbostratus. The appearance of this cloud indicates that there is a lot of water vapor in nimbostratus, and heavy rain 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. ?

Dark clouds catch the sunset, not today, but tomorrow.

When the sun goes down, a wall-like dark cloud rises below the western horizon to catch the sun, indicating that the dark cloud moves eastward, and the rainy weather 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.

5, the carp point in the sky, don't turn over tomorrow.

Carp spot refers to translucent cumulus clouds, and the air mass that produces this cloud is stable. In the evening, when it encounters downdraft, the clouds quickly dissipate, and the next day is sunny. However, if the cloud looks like a tiny fish scale, it is cirrocumulus. This kind of cloud mostly appears in front of the trough of low pressure or around the typhoon, and there will be wind or rain in the near future. Therefore, there is a proverb "It doesn't rain, but it's windy".