What's the story of frost before thunder? What is the weather like after the first frost?

The weather is never certain. People may learn from the agricultural proverbs of many tourists, and now there is a weather forecast. We will formulate corresponding measures according to the reminder of the Meteorological Bureau. Today, let's take a look at those agricultural proverbs. What about thunder after the first frost? What about the weather after the first frost?

How do you say it thunders after the first frost?

The first frost is the last solar term in autumn. Every year, the first frost will celebrate the festival between1October 23rd and 24th, 10. The first frost points to "Xu" during the festival, and the solar calendar is 2 10. "The jackal is a sacrificial animal, the plants and trees turn yellow, and the insects are salty" is the phenological law of the first frost solar terms. According to folk sayings, the different weather conditions of the first frost on that day also have a certain foreshadowing effect on the rain, sunny, snow or the next year. Our ancestors also left us many proverbs by virtue of their past experience.

When the first frost thundered, the weather was hot and cold.

What this proverb wants to explain is that if there is thunder during the festival during the first frost, it means that there must be convective movement of cold and warm air at that time. The occurrence of thunder is caused by the collision between cold air and "hot" warm air.

Meteorologists said that although the first frost or thunder in winter is rare, it is not surprising. Thunder usually occurs in three situations: first, the ground is heated by solar radiation, which "bakes up" the air near the ground, making the density of the heated air smaller and lighter, and the heat begins to rise; Second, when the warm and humid airflow is moving, it meets the obstacles of mountains to form dynamic uplift; Thirdly, in a certain layer of the sky, there is a warm and humid airflow moving from the south, which is blocked by cold air in the opposite direction, making the warm air rise sharply and the cold air insert sharply. The first two cases can be basically ruled out when the first frost thunders. The thunder of the first frost is only the result of the collision of cold and warm air under certain conditions.

What will the weather be like after the first frost?

The first frost is sunny and the winter is not cold.

This proverb tells us bluntly that if the first frost is sunny during the festival, it indicates that the next winter will be sunny and it will not be too cold all winter. As for the reasons behind this, it is easy to understand after a little thought.

The warmth and coldness we feel every day is directly related to the sunlight the earth receives. On sunny days, there are no clouds in the sky or the clouds are thin, which is convenient for the sun to shine on the surface without shelter, so that the surface can absorb more heat generated by the sun, thus making the temperature higher and giving people a warmer feeling. A similar proverb says, "the early winter is warm, and the early frost has no rain."

There is rain in the first frost, and there is much rain in spring; There is no rain in the first frost and drought in winter and spring.

What this proverb reveals to us is that whether it rains on the first frost festival indicates the precipitation in winter and spring in the future. If the first frost is rainy, the main reason is that there will be plenty of rain in the spring next year. If it doesn't rain on the first frost day, it is often a sign of drought in winter and spring, which is very unfavorable to the growth and development of overwintering crops.

The rainy solar terms from the first frost to the next year just need eight solar terms of 120 days. Say, "There is rain in the first frost, and there are many spring rains; There is no rain in the first frost and drought in winter and spring, which should also be in line with the 120-day rhythm of meteorological change. Proverbs like this, as well as "the first frost is fine, and there is little snow; Frost, rain and snow ","the first frost has rain and rain, and the first frost has been dry for more than a winter "and so on.

See frost at first frost, see ice in beginning of winter.

The proverb "See frost at the first frost, see ice in beginning of winter" actually proves that the climate is relatively normal. Generally speaking, the weather of the first frost should be relatively simple during the festival. At this time, the winter wind basically replaced the summer monsoon, and the dry and cold air began to completely gain the upper hand and gradually dominated the world. Warm and humid air is marginalized, and many weather with summer and autumn characteristics quit. The first frost originally reflected the climate characteristics of cold weather. After the cold weather, the temperature reached freezing point. If there is enough water vapor to condense at night, frosting is normal.

Frost comes first, and the climate is normal. Beginning of winter sees ice, so it is. Similarly, there is a proverb that "the first frost sees the frost, and the light snow sees the snow". In normal years and relatively normal climate, it is not surprising that the first frost has frost, and there is snowfall when light snow meets.

Our ancestors left us many such proverbs with their past experience, so that we can basically understand the omen of the weather. Of course, there is a certain probability. After all, according to different regions, the weather will change differently.

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