Thunderstorm hierarchy and distribution characteristics of thundershowers

Thunderstorms can be divided into different levels according to the amount of precipitation. The details are as follows:

1.Light rain: No more than 10 mm of precipitation in a 24-hour period.

2.Moderate rain: 10-25 mm of precipitation in 24 hours.

3.Heavy rain: 25-50 mm of precipitation in 24 hours.

4.Heavy rain: More than 50 mm of precipitation in 24 hours.

5.Heavy rain: 70-140 mm of precipitation in 12 hours, or 100-250 mm in 24 hours.

6.Extremely heavy rain: more than 140 mm of precipitation in 12 hours, or more than 250 mm in 24 hours.

In addition, if there is a rain shower accompanied by thunder and lightning, it is generally called a thundershower. Thundershowers can also be graded according to the amount of precipitation, but they are slightly different from rainfall alone. For example, thundershowers can have levels of light, moderate, and heavy rain, but generally do not exceed the level of heavy rain.

The above is the hierarchical division of thunderstorms, which can be used according to different needs and situations.

1. The first layer mainly writes about their past contradictions. Shi Ping narrates other people's stories in a tone that tells her own tragic experience and exposes Zhou Puyuan.

of coldness. 2. The second layer, write about their current contradictions. Through the change in Zhou Puyuan's attitude after recognizing Shi Ping and Shi Ping's performance, Zhou Puyuan's hypocrisy was exposed.

In China, thunderstorms mostly occur in the weather with high temperature and humidity in May and August. In spring and autumn, it mainly occurs in the south of the Yangtze River, with the least in winter, and after October, there will be no thundershowers in the vast areas north of the Yangtze River.

In terms of the time of day, it mostly occurs in the afternoon and evening.

Thundershowers are weather phenomena that manifest themselves as large-scale cloud movements, much more intense than showers, and are accompanied by electrical discharges, commonly found in summer. When thundershowers come, there are often strong winds and thunderstorms. When the wind comes, the sand and rocks are scattered, and the roof is blown down and the wall is blown down.

In the wind and rain, things in the street dance in the wind, fly everywhere, and even uproot large trees.

A brief analysis of the causes. In summer, direct sunlight causes water on the ground to evaporate faster than in winter, spring, and autumn. The air close to the ground is warmer and can absorb more water vapor, which causes the density of the air to decrease, and the air becomes lighter, and the lighter air keeps rising.

As the altitude increases, the temperature gradually drops (every 100 meters of ascent, the temperature decreases by a degree) and the air cools down. When the air is cold, it will not be able to contain the abundant water vapor, and some of the water vapor will condense into small water droplets, and the sky will become cloudy. So, why don't these little droplets fall down so quickly and become rain?

This is because the small water droplets are so small that the rising thermals hold them up and push the suspended water droplets higher and higher. The clouds are piled up larger and higher, and such clouds are called cumulonimbus clouds in meteorology, and their bases are about 1,000 meters above the ground.

When the small water droplets in the cumulonimbus cloud collide and merge into larger droplets, they begin to fall, while the hot air rising from the ground rushes upwards vigorously, and the friction between the two takes on an electric charge. The rising air flow is positively charged, and the falling water droplets are negatively charged. Over time, a large number of positive charges accumulate at the top of the cumulonimbus cloud and many negative charges at the bottom.

The ground is also positively charged by the negative charge at the base of the cumulonimbus cloud.

The water droplets in the cloud merge and increase until the updraft can no longer hold up the hot air current, and it falls straight down from the cloud. The thermal currents below rained down, and suddenly cooled, no longer rushing upwards, but swooping down on the ground. At this time, the electric charge in the air began to discharge, accompanied by a rumbling thunder.

Because lightning travels at the speed of light at 300,000 kilometers per second, and thunder travels at the speed of sound at 331 meters per second, people see the lightning before they hear it. Sometimes the thunder drags on for a long time, which is caused by the clouds, the peaks of Yandaxiao Mountain and the ground reflecting the thunder back and forth.

In China, thunderstorms mostly occur in the weather with high temperature and humidity in May and August.