Why is it always sultry when thunderstorms come?

Thunderstorm, as its name implies, is the rain accompanied by lightning. Thunderstorm weather is one of the disastrous weather phenomena in nature, which comes and goes quickly. It often happens in summer. When it happens, there are often strong winds and lightning.

So, how did the thunderstorm weather come from? This is a question that many people are curious about. Moreover, many people also find that the weather is always extremely hot before a thunderstorm. What is the reason? Next, the weather network will tell you the reason of the thunderstorm and why the weather is sultry before the thunderstorm.

In summer, direct sunlight makes the water vapor on the ground evaporate more. The air close to the ground is heated, which can hold more water vapor, resulting in lower air density and lighter weight. With the increase of height, the temperature gradually drops. When the air can't hold more water vapor, some water vapor begins to condense into small water droplets.

At this point, the water droplets are supported by the rising hot air flow and constantly pushed upward, as if? Snowball? In the same way, the more it accumulates, the more cumulonimbus clouds form. When countless small water droplets in the cumulonimbus cloud continue to collide and merge into larger water droplets and begin to fall, the hot air rising from the ground still rushes upward without hesitation, and the two collide violently and are charged.

It won't take long for the top of cumulonimbus cloud to accumulate a lot of positive charges, while the bottom of cumulonimbus cloud accumulates a lot of negative charges, and the ground is positively charged due to the induction of negative charges at the bottom of cumulonimbus cloud.

At this time, the small water droplets in the cloud are still merging and increasing. When the rising hot airflow really can't hold them, raindrops are formed to fall straight from the cloud. After the rain, the hot air in the lower layer suddenly became cold and dived to the ground, and the charges in the air began to discharge, so the thunderstorm weather came into being.

Thunderstorm weather requires two conditions: first, the ground temperature should be high; Second, the atmospheric humidity should be high. When the ground is very hot, the air temperature near the ground will rise very high. When the temperature rises, it will gently float into the sky, but if it is only hot and the air is dry, there will be no thunderstorms. Because only when the air with high humidity rises to the sky and meets condensation nuclei will thunderstorm clouds form. Only when there is Lei Yun in the sky will there be a thunderstorm. When the weather is hot and there is a lot of water vapor in the air, the sweat on people is not easy to dissipate, and we will feel very stuffy. It's like taking a bath in a stuffy bathroom. It feels hot and stuffy. So sultry weather is a sign of high water vapor and temperature in the atmosphere, and it is also a sign of thunderstorm. But sometimes, although it is sultry, it can't thunder. This is because the scope of thunderstorms in summer is relatively small and uncertain, and the rain may have fallen somewhere else.