Why does thunder and lightning occur on rainy days, and why does thunder and lightning occur when it

Thunder and lightning are the phenomenon of electrical discharge in thunderstorm clouds. There are certain conditions for the formation of thunderstorm clouds, that is, there must be sufficient water vapor in the air, there must be a power to make the moist air rise, and the air must be able to produce violent convective movements. In spring and summer, due to the influence of the warm and humid airflow from the south, the air is humid, and at the same time, the solar radiation is strong, the air near the ground is constantly heated and rises, and the cold air in the upper layer sinks, which is easy to form strong convection, so there are many thunderstorms and even hail.

In winter, due to the control of the continental cold air mass, the air is cold and dry, and the solar radiation is weak, the air is not easy to form violent convection, so thundershowers rarely occur. However, sometimes the weather is warm in winter, and the warm and humid air is stronger, and when the strong cold air in the north occasionally goes south, the warm and humid air is forced to rise, and the convection intensifies, thundershowers will be formed, and the so-called "thunder winter" phenomenon appears. Meteorologists also say that the generation of thunderstorms does not depend on the temperature itself, but on the distribution of the temperature up and down.

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. Winter thunder is rare in China, but it often occurs in the winter in Toronto, Canada When the air is extremely unstable, it is easy to have a strong upward convective movement, and the formation of towering cumulonimbus clouds, the clouds are filled with water vapor running up and down, static electricity will be generated, the upper end of the cloud will produce a positive charge, the lower end of the cloud will produce a negative charge, and the ground is a positive charge, then, there is air as an insulator between the positive and negative charges, if the voltage difference between the positive and negative charges is large enough to break through the air of the insulator, so that the air expands in an instant** , heat and glow, glow is lightning, expansion ** makes a loud sound is thunder, and it may also thunder when it snows in winter. It's just very rare.

Thunder and lightning usually occur in severe convective weather. For example, the tropical rainforest climate zone, the convective rain that often occurs in the summer afternoon in China, and the typhoon rain that often occurs on the east coast of the low-latitude continent are often accompanied by thunder and lightning.

The most thunderstormed place in the world is Bogor (tropical rainforest climate) on the Indonesian island of Java, where there are an average of about 322 thunderstorm days per year, and is known as the "thunder capital of the world". Severe convective weather requires a warm and moist airflow to rise rapidly. In summer, it is easy for the ground to warm up quickly, so severe convective weather – thundershowers – often occurs.

In winter, there is less chance of severe convective weather, but sometimes strong cold air moves southward, which can also cause warm and moist air near the surface to rise rapidly in some areas. At this time, it is common to have snowstorms and other events, and it is normal for them to be accompanied by thunder and lightning. Thunder is a large current flowing through the air requires two conditions, one is that the clouds accumulate a large amount of charge, the other is the smooth discharge path, snow does not thunder, I think there are two reasons 1 is that the snow is mostly in winter, and the cloud generates charge mainly because of the updraft and its friction, there are few updrafts in winter, so the charge accumulation is not much 2 is that the air humidity in winter is not as large as in summer, and the humid air is easy to conduct electricity, so the clouds in winter are not easy to discharge

Why does it rain and thunder rain when it rains.

It is because when it rains, the dark clouds in the sky will squeeze up and down, so it is easy to release a very large amount of energy, so there will be thunder and lightning.

Because there are a lot of electric ions in the air, and when it rains, there will be a lot of problems, and the phenomenon of thunder and lightning is also a natural phenomenon.

Because there are positive and negative charges in the clouds. Then these two charges will produce the phenomenon of discharge, and thunder will be generated.

Why does it rain and thunder rain when it rains.

Lightning is an electrical spark produced when the charge generated by the cloud during its motion is discharged when it is discharged, and it is both light and sound. It's just that the light and sound in thunder and lightning are more powerful than the electric sparks we see in our lives.

The reason why lightning is seen first and then thunder is heard is because in the air, light travels fast and reaches the ground quickly, while sound travels slowly in the air and reaches the earth after a while. So you will hear the lightning first and then hear the thunder. In fact, lightning and thunder appear at the same time.

The reason for such a difference in the time it takes to reach the ground is that light travels 3,000,000 kilometers per second, while sound travels only one kilometer in the air. The speed of sound is only one-900,000th the speed of light.

Some lightning bolts are long, some are short, some are loud, and some are quiet. You can roughly judge the height of the clouds to the ground based on the time it takes for the sound to reach the ground. It doesn't take much time for the light to reach the ground, it can be considered 0, from seeing lightning to hearing thunder, how many seconds is the interval and multiplied by 340 meters, which is the distance from lightning to you.

Thunder is reflected when it encounters clouds or tall buildings, so it usually takes a while for a lightning bolt to disappear.

Thunder and lightning will occur on rainy days because when the air is extremely unstable, it is easy to have a strong upward convective movement, and the formation of towering cumulonimbus clouds, the clouds are filled with water vapor running up and down, static electricity will be generated, the upper and lower ends of the cloud will produce electric charges, and the air will expand in an instant** Thunder, and the electric spark emitted is lightning.

When it rains, some of the clouds in the sky are positive and some are negative. When two clouds collide, lightning strikes, and at the same time emits a lot of heat, heating and expanding the surrounding air. The air that is heated and expanded in an instant will push the surrounding air, causing a strong **-type vibration, which is thunder.

Thunder and lightning are the phenomenon of electrical discharge in thunderstorm clouds. The formation of thunderstorm clouds generally requires two conditions, sufficient water vapor and violent convective movements.

Lightning is a phenomenon of intense electrical discharge between clouds, between clouds and the ground, or between parts of the cloud. Usually storm clouds (cumulonimbus clouds) produce electric charges, with yin electricity at the bottom and yang electricity at the top, and also a positive charge on the ground, which follows the clouds like a shadow. Positive and negative charges attract each other, and the positive charges run towards trees, hills, the tops of tall buildings, and even the human body, reaching down and getting closer to the ground.

Eventually, the negative charge of the cluster base finally overcame the barrier of air and connected, and a huge electric current surged along the conductive airway from the ground to the clouds, and lightning was generated.