Is it possible to thunder today?

It's possible. It thunders, usually in summer, but it also thunders in winter and spring.

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1。 Why does it thunder in winter? As we all know, lightning is a discharge phenomenon in thunderstorm clouds. The bottom of this cloud is about 1 km above the ground. Generally, the top of the cloud is positively charged, and the bottom of the cloud is negatively charged, and the corresponding ground will also generate induced charges opposite to the bottom of the cloud. Due to convection, the cloud moves up and down, and the ice crystals in the cloud rub against each other to gradually increase the charge. The area with the same charge inside the cloud forms a strong electric field between the cloud and the ground. When the electric field reaches a certain intensity, it will neutralize and discharge each other, resulting in high temperature in the optical path, which will make the surrounding air heated violently, suddenly expand and make a huge noise. This is thunder.

From the causes of lightning, we can know that the formation of thunderstorm clouds should meet certain conditions, that is, there should be enough water vapor in the air, the power to make humid air rise, and the air should be able to produce strong convection. Spring and summer are affected by the warm and humid airflow in the south, with humid air and strong solar radiation. The air near the ground is constantly heated up, and the upper cold air sinks, which is easy to form strong convection, so there are many thunderstorms and even hail. Winter is controlled by the continental cold air mass, the air is cold and dry, the solar radiation is weak, and the air is not easy to form violent convection, so there are few thunderstorms, let alone hail. But in winter, sometimes the weather is warmer, and the warm and humid airflow is stronger. When there is occasional strong cold air going south in the north, warm and humid air is forced to rise, convection is intensified, and thunderstorms can also be formed. The warm and humid airflow is particularly strong, and the convection is particularly strong. It can also form hail, and the so-called "thunder into winter" phenomenon appears. Xiangtan city is like this this this year.

Thundering in winter means that the air humidity is high and it is easy to form rain and snow, so there is a saying that it thunders and snows in winter. If there is a lot of snow and ice and the temperature is low, livestock are most likely to be frozen, causing diseases and even death in severe cases, so there is also the saying that "lightning strikes winter and ten cowsheds are empty".

"Thunder and winter" only shows that the weather at that time provided favorable conditions for the formation of ice and snow, and it is not necessarily related to whether there is low-temperature ice and snow weather in the later period. However, whether livestock suffer from freezing injury is not only related to the length of the freezing period of ice and snow, but also mainly depends on the measures taken by people to prevent cold and freeze. As long as the cold and antifreeze preparations are made as early as possible and the barn is trimmed, even if there is rain, snow and freezing weather, the livestock can be safely wintered. If you are careless and don't pay attention to anti-freezing work, it will be a "warm winter" year, which may also cause livestock death.

2。 Thunderstorms often occur in summer and also in spring. But not all rain will thunder. Lightning is a discharge phenomenon in thunderstorm clouds. The formation of thunderstorm clouds should meet certain conditions, that is, there should be enough water vapor in the air, the power to make wet air rise, and the air should be able to produce strong convection. Spring and summer are affected by the warm and humid airflow in the south, with humid air and strong solar radiation. The air near the ground is constantly heated up, and the upper cold air sinks, which is easy to form strong convection, so there are many thunderstorms and even hail.

In winter, controlled by the continental cold air mass, the air is cold and dry, the solar radiation is weak, and the air is not easy to form violent convection, so thunderstorms rarely occur. But sometimes the weather is warmer in winter, and the power of warm and humid air is stronger. When the cold air in the north occasionally goes south, the warm and humid air is forced to rise, and the convection intensifies, so-called "thunder into winter" phenomenon will occur. Meteorologists also say that the occurrence of thunderstorms does not depend on the temperature itself, but on the upper and lower distribution of temperature. In other words, although the temperature is not high in winter, if the temperature difference between the upper and lower reaches a certain value, strong convection can also be formed, resulting in thunderstorms. Thundering in winter is rare in China, but it often happens in Toronto in winter.

It always thunders before it rains.