1, 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.
2, cotton cloud, rain is coming.
Cotton clouds refer 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.
3. Dark clouds meet the sunset, which will not fall today, but will fall 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.
It's sunny now, so I haven't seen you for three days.
In spring and summer, at noon on rainy days, the clouds split and the sun appeared, but the clouds quickly gathered and became thicker, indicating that the local area was under the influence of the quasi-static front, and the airflow near the quasi-static front was strong and changeable.
When the updraft is strengthened, the clouds become thicker and the rainfall increases; When the updraft weakens, the clouds become thinner and the rainfall decreases or stops; Around noon, the sun shines strongly, the upper part of the cloud is heated and evaporated, or the updraft below the cloud weakens, and the zenith cloud will split. As the solar radiation weakens or the updraft under the cloud strengthens, the split clouds gather again and become thicker.
5, the sunset shoots the foot, and the rain falls within three days.
It means that the sun shines through the cracks in the clouds, which is called "sun foot". The foot of the sun appears in the evening, indicating strong convection and rain.
6, the morning glow does not go out, and the sunset glow travels thousands of miles.
There are no clouds in the east and clouds in the west in the morning. Sunlight shines on the clouds and scatters rosy clouds, indicating that there is a lot of water vapor in the air or a rainfall system moves in. During the day, the air is generally unstable and the weather will turn rainy. If there is a sunset glow in the evening, it means that the sky in the west has cleared up, and the general convection is weakened at night. The clouds in the east that form the rosy clouds will move eastward or tend to dissipate, saying that it will be fine tomorrow.