Meteorological proverbs about clouds and their explanations

Proverbs are concise phrases widely circulated among the people, which mostly reflect the practical experience of working people and are generally passed down from mouth to mouth. Most of them are easy-to-understand spoken short sentences or rhymes.

Meteorological proverbs and explanations about clouds;

Clouds are dense drops of water or ice suspended in the sky. It can rain or snow from the clouds. Anyone who has experience in weather changes knows that whatever clouds hang in the sky is what the weather is. Therefore, clouds are the appearance of weather, and the shape of sky clouds can show the dynamics of weather changes in a short time. Cloud is a phenomenon that can be directly seen by the naked eye, so there are the most proverbs about it, which is more in line with scientific principles.

Fog is also a dense water drop or ice drop suspended in the sky. As far as existing entities are concerned, there is no difference between fog and cloud. But judging from the reasons for their formation and the environment in which they appear, they are two different things. The bottom of the fog layer is close to the ground, so it can be seen that the foggy air layer does not move upward, and the cooling process necessary for water vapor condensation is carried out in the stable air layer on the ground. This means that in foggy weather, the atmosphere is stable, and the atmospheric instability of clouds is just the opposite. The weather that finally evolved was just the opposite. Cloudy weather is mainly rainy, and foggy weather is mainly sunny. Similarly, fog is a phenomenon visible to the naked eye, so there are many proverbs about fog.

It's foggy in the morning and sunny all day. (Luanxian County, Hebei Province)

* Ten fogs and nine sunny days. (Shangqiu, Henan)

* One fog and three eyes. (Weixian County, Hebei Province)

The fog poisoned the sun. (Changzhou, Jiangsu)

* Get up early and get foggy, and break the gourd at noon. (Cang County, Hebei Province)

The fog in the morning is the product of radiation and heat dissipation on the ground last night: due to the clear sky, the heat on the ground spreads smoothly all night, and the water vapor in the ground air becomes saturated and condenses into fog drops. You can see that the weather will clear up first, and then it will be foggy. Morning is the lowest temperature between day and night. Because the temperature is coldest, the fog is thickest at this time. In addition, as soon as the sun comes out, some oxygen in the air becomes ozone because ultraviolet rays shine on it. This small amount of ozone will make a lot of dust (mostly combustion products, such as carbon dioxide, sulfur dioxide and so on) in the air. ) enhance your water absorption ability. So the fog curtain suddenly became thicker in the morning. But the sun rises, the heat intensifies, the ground becomes too hot, and the air in the lower layer will rise, so the fog drops will dissipate. In this way, the fog in the morning temporarily thickens, which is also the result of clear skies and sunny weather in Wan Li.

* Clouds cover the sky at night and wear shoes in the morning; It's foggy in the morning. Just wash your clothes and pants. (Hunan)

Clouds cover the sky at night, and there is no dew and frost on the ground in the morning. So you don't need rain boots to travel in the morning. This is because the clouds in the sky can protect the ground from heat dissipation. If there are clouds at night, it won't be very cold in the morning, and the water vapor sticking to the ground won't condense into dew or frost, so the ground is clean.

It's foggy all over the ground in the morning, and the weather is good. Just wash your clothes and pants. Fog is the product of sunny days. If there is fog, it must be sunny.

* The fog does not exceed level 3. (Hunan)

* The fog will only last for three days, three days or eighteen days. (Hebei)

If the fog lasts for three days, there will be a strong wind. (Hu Hezhi Te)

* Where there is fog for three days, there will be heavy rain. (The Emperor's Century)

There are many kinds of fog, and the causes of all kinds of fog are also different. However, what can be called fog and can happen for three days in a row is probably low radiation fog, sea fog or tropical airflow fog.

Low-radiation fog appears in the high-pressure center of fine weather. Therefore, in foggy days, the temperature is very high during the day, which leads to low air pressure. If the weather is fine for three or four days, the local air pressure will be greatly reduced, so the airflow from other places will blow here and the weather will change.

If fog appears in the ocean airflow, it is called sea fog. Because this airflow comes from the ocean, the temperature is extremely warm and the humidity is extremely high, and then the local air pressure will gradually decrease and the weather will change.

In autumn and winter, tropical airflow often blows to the north. Because the ground is cold at this time, the air near the ground is also cold and foggy. This is called tropical airflow fog. The tropical airflow prevailed for three or four days. It must be warm and humid here, the air pressure became lower, and then the weather changed.

It's foggy in the morning and sunny at night. (Tai County, Jiangsu Province)

Early fog refers to the fog during the day. Cloudless weather, sunny, warm ground, airflow can only rise into clouds, it is impossible to stay on the ground and become fog. It's foggy during the day, but there are clouds in the sky and the sun is not there. This is a cloudy scene. Another possibility of fog during the day is the low-level clouds in the cyclone and on the warm front, which is the weather in the center of the cyclone, and of course rainy weather is just around the corner.

Night fog is fine. Night fog is equivalent to night fog and early morning fog, so it must be sunny.

* foggy days in spring, foggy days in summer; Autumn fog and cool wind, winter fog and snow. (Jiangyin, Jiangsu, Changsha, Hunan)

It's still cold in spring, and it's even colder on a clear night. The atmosphere is cold and heavy, the ground is calm, warm and light, floating on it, raising the temperature upwards. So the ground water vapor condenses into fog first, and then develops upwards; However, the upper air temperature is warmer and there is less water vapor, so the development of fog is limited to the thin layer on the ground. It is only a few feet high, and the lowest is only as high as a human body. After dawn, the sun came out, because the sky is cloudless in Wan Li, the ground is hot, the fog rises and dissipates, and the sky is still strong sunshine. This is the explanation of "Spring Fog Day". But if the rising fog is prevented from rising by the warm air at high altitude, then the fog curtain will appear as a layer of clouds in the sky and the weather will be cloudy. So "the sun rises in the spring fog" is not inevitable.

In summer, the weather is hot, the days are long and the nights are short. It is impossible to cool the ground air to the point where it can condense fog in one night, so there can be no fog in summer in Mystery. If there is fog in summer, it may be because there are clouds in the sky, the lower layer is wet and thick, the sun is weak, the ground temperature is not strong, and the airflow does not move upward. This is a scene of cyclone weather. The fog you see may be a low cloud in a cyclone, so it's going to rain.

Fog in autumn and winter, like spring, is also the product of sunny days, so there are still many good weather during the day for the same reason as "spring fog". But the sunshine in autumn and winter is not as strong as that in spring. The so-called "autumn mildew and cool breeze, winter fog and snow" may be at the front of high pressure in the south, because cold air and local warm air often mix to produce fog. When the high pressure first came, the wind was quite strong and it could snow in winter. If it is in the center of high pressure, there may be a sinking westerly wind during the day.

* Clouds eat fog, and fog eats clouds. (Hohhot)

After the fog clouds, it rained; The clouds are clear and the sun is shining. Fog is more common in anticyclones, and the weather is unfathomable; Clouds that cover the sky are more common in cyclones and the weather is bad. After the fog, a big cloud came. Maybe the anticyclone has passed and the cyclone is coming. It is also possible that the sky is warm and wet, the fog is thick and clouds appear. This is the scene before the rain. On the other hand, if the clouds disappear and the fog rises, it means that the cyclone has gone, and the mysterious anticyclone weather has arrived, and it will be fine.

* When the fog goes down the mountain, the ground won't dry. (Hohhot)

* Clouds cover the bottom of the mountain, with little thunder and little rain. (Inner Mongolia Hu Hezhi Te)

* cloudy foothills, wet feet. (Yiwu, Zhejiang)

This refers to the phenomenon that the clouds on the mountain fall to the ground.

This is the cloud system in the cyclone. The farther you go to the center of low pressure, the closer you get to the rain area. So the phenomenon of low clouds indicates that it is going to rain and the ground is not dry yet.

* The fog will never stop and the rain will never stop; When the fog rises, it closes, and the rising sun can be found. (Yiwu, Zhejiang, Yuanxi, Jiangsu)

Fog usually appears on a clear night. Under normal circumstances, after sunrise, as the sun rises, the fog will slowly disperse, and there will be good weather with "the rising sun can be found". If the fog does not disperse after sunrise, it is likely that there are clouds above the fog. At this time, the fog can rise and meet the clouds, which will increase the thickness of the clouds and lead to continuous drizzle.

* Mountains are covered with rain, and rivers are covered with sunshine. (Fuling, Sichuan)

The cover on the top of the mountain is a low cloud covering the mountain. This is the scene of the rain area in the center of the cyclone, so it's going to rain. The cover of the river is low radiation fog, which is the product of sunny days and the result of cloudless days and ground heat dissipation. Therefore, it is said that "the river is facing the sun".

* Wear it at the top of the sky and hang it on all fours at dusk. (On Tian Xing)

* One day, one night, the main eye; On the contrary, it will rain. (On Tian Xing)

The meaning of "one day in the morning" is exactly the same as that of "one day in the morning", "one day in the evening" and "one day in the evening", which are all signs of sunny days.

After the sun goes down on a sunny day, the air on the ground is calm, and the air in the morning is even more silent. At this time, only when it condenses into low fog on the ground can there be no clouds. Therefore, "zenith wear" has become a guarantee of fine weather. In any mysterious weather, the sun is strong, and the ground airflow can rise to form clouds; But the four sides of the horizon are suspended and clean. This cloud is generated at the local zenith, or there may be convective thunderstorms, but it will soon disappear, so it is a sign of good weather in the future. If a storm comes in the distance, there must be thick clouds on the horizon, which can never be empty.