Traditional Culture Encyclopedia - Weather inquiry - Common sense of thunderstorm weather
Common sense of thunderstorm weather
First, you can't stay on the floor (house).
When some residents saw thunder and rain, they ran to the top of the building to collect clothes and other items to dry or shoot rain scenes. When lightning strikes the head, standing on the roof is vulnerable to lightning. Because, when charged Lei Yun approaches a building, an important condition of lightning strike is that once the distance from the bottom of Lei Yun to the top of the building meets the air breakdown field strength of about 300 kV to 500 kV per meter, Lei Yun will discharge the building.
When people stay at the top of the building, the electric field intensity required for lightning stroke will undoubtedly decrease, and the unconscious movement caters to the need of Lei Yun to choose the lightning stroke channel, thus inducing the occurrence of lightning stroke. Second, pay attention to close the doors and windows.
Closing doors and windows can prevent the invasion of side lightning and ball lightning. If we can't stop the ball thunder from entering the room, the consequences will be very serious.
Most ball mines occur after people first see lightning, which means that the probability of ball mines after direct lightning strikes is relatively high. Generally, a ball mine is a few centimeters to dozens of centimeters in diameter, and emits red, yellow or blue light, like a fireball, so it is called a ball mine.
Generally, it moves horizontally at a speed of several meters per second and at a height of several meters above the ground, and it also jumps, which is very energetic. Most ball mines enter the room along the chimneys, windows and doors of buildings, and then move indoors for a few seconds and then escape. Some of them escape from the tile surface of ordinary houses or cause explosions. Lightning protection experts believe that the movement of ball mines is related to the direction of air movement, and air movement can be blocked by closing doors and windows, thus preventing ball mines from entering the room.
Third, it is not advisable to use a shower. This is mainly because in the case of direct attack on buildings, huge lightning current may cause showers to be struck by lightning along the water flow.
At the same time, don't touch metal pipes such as water pipes and gas pipes. Because when these metal bodies are poorly grounded, lightning current sometimes discharges to the human body through the air with these conductors.
Four, should not be close to the building exterior wall and electrical equipment. When thundering, stay away from the power line and the electrical equipment connected with it 1 m. This suggestion has certain scientific truth.
People don't realize that it is necessary to keep a certain distance from external walls, columns, power lines and related equipment when thunderstorm weather approaches, and indirect injuries caused by lightning strike occur from time to time. This is because people don't understand that the direct lightning protection facilities of buildings are mainly to protect buildings from lightning damage and reduce the impact of lightning electromagnetic pulses on the interior of buildings, but can't prevent other forms of lightning damage caused by metal conductors introduced into buildings along the outdoor.
2. What is the best common sense of lightning protection in summer thunderstorm weather?
First, don't make yourself a sharp edge, that is to say, try to lower your height, and don't carry metal objects such as shovels, hoes and golf clubs over your head, because this will increase the chance of being directly hit by lightning.
If there is nothing higher than yourself around, it will be dangerous to open an umbrella. During the lightning, it is best not to ride a horse, bike, motorcycle or tractor in a flat open area, because you may become a prominent object in the surrounding environment and attract lightning strikes.
Second, try to reduce the contact surface between the human body and the ground and reduce the harm of step voltage. According to the first requirement, the best way is to find a ravine or depression, and squat on the flat ground with your feet together when necessary. You should be careful not to support the ground with your hands, put your hands on your knees at the same time, keep your chest close to your knees and keep your head as low as possible, because your head is more vulnerable to lightning than other parts of your body.
(People should bend over and squat together) Third, outdoor ball games are not suitable. Playing outdoor ball games in thunderstorm days is easy to cause serious consequences of group death and group injury, which has been proved by many examples of lightning disasters abroad.
1On September 20th, 993, four players were killed in a football match near Kuala Lumpur, Malaysia. Therefore, the World Cup Organizing Committee will install a large number of advanced lightning protection equipment in the main football fields of the host country.
If you feel ants crawling on your head, neck and hands, and your hair stands on end (it has been electrostatically induced by clouds), you should get down on the ground quickly to reduce the risk of being struck by lightning, and take away the metal ornaments, hairpins and necklaces you wear. It is best to carry non-metallic rain-proof equipment when going out, such as plastic raincoat, wooden handle or umbrella with plastic handle. Don't rush to shelter from the rain when it thunders, because striding through the body has a high voltage and is easy to hurt people. In the suburbs, it is best to hide in buildings with metal doors and windows or lightning rods, or in cars with metal bodies.
Once these buildings or cars are struck by lightning, their metal frames or lightning protection devices or the metal itself will lead lightning current into the ground. If you happen to be in a dense forest, you'd better find a clearing in the forest, choose a place as far away from the surrounding trees as possible, and squat down with your feet together.
At this time, because the tall trees are vulnerable to lightning, the rain shelter in the open area is protected. When lightning strikes, it is best not to go fishing, boating or swimming in lakes, rivers and seas, because these electrical conductors are easy to attract lightning.
3. What are the safety knowledge of thunderstorm weather?
1. Don't stay on the high-rise platform in thunderstorm weather, and don't enter isolated shacks, sentry boxes, etc. In the open air.
2. Stay away from the exposed water pipes, gas pipes and other metal objects and power equipment in the building.
3. It is not advisable to hide under the big tree during a thunderstorm. If necessary, you must keep a distance of 3 meters from your torso, squat down and put your legs together.
4. If there are ants crawling on your head, neck and hands when thunder and lightning strike, and your hair stands on end, it means that lightning is coming. Get down on the ground quickly to reduce the risk of being struck by lightning, and take away the metal ornaments, hairpins and necklaces you wear.
5. If it is too late to leave tall objects due to outdoor thunderstorm, you should immediately find some dry insulation and put your feet on it. Never put your feet on the ground outside insulation, because water can conduct electricity.
6. When avoiding thunderstorm outdoors, be careful not to hold the ground with your hands. At the same time, put your hands on your knees, keep your chest close to your knees, and try to keep your head down, because your head is more vulnerable to lightning than other parts of your body.
7. When you hear thunder within a few seconds of seeing lightning outdoors, it means that you are in a dangerous environment near a thunderstorm. At this time, you should stop walking, put your feet together and squat down immediately. Don't get involved with people. It is best to use plastic rain gear and raincoat.
8. In thunderstorm weather, it is not advisable to open an umbrella or hold high badminton rackets, golf clubs and hoes in the wild. Not suitable for outdoor ball games. It is very dangerous to play golf and football in thunderstorm weather. It is not advisable to stay on the water surface or water edge; It is not advisable to wash clothes, fish, swim or play by the river.
9. In thunderstorm weather, it is not advisable to drive a motorcycle, ride a bicycle or run fast in the rain, because the greater the stride of the body, the greater the voltage, and the easier it is to hurt people.
10. If you see a high-voltage line that is broken by lightning outdoors, you should be vigilant at this time, because there is a step voltage near the breakpoint of the high-voltage line. People nearby must not run at this time, but should jump off the scene with their feet together.
4. What are the common sense of thunderstorm weather safety?
1, it is essential to close the doors and windows during a thunderstorm. At the same time, it is necessary to unplug all the power in the house in time, and it is best not to play with mobile phones and computers. Of course, never watch TV, or you will get hurt if the TV breaks down.
2. Even if the power supply is unplugged, the concentrated wires are still charged. It's best not to get too close to the wires, and try to stand under the light bulb. Because if the thunder is particularly serious, the light bulb may break, and standing under the light bulb is particularly dangerous.
3, can't take a shower, because the hot water appliance is charged. At this time, bathing may conduct electricity, which is likely to threaten life safety. It is best to unplug the water heater, and it is best not to turn on the water heater in thunderstorm weather.
4. Keep away from windows, walls, etc. And it is best not to stand barefoot on the ground. One thing to note here is that it is best not to use iron wire as a clothesline to connect the windows, which is easy to introduce lightning.
In case there is a thunderstorm outside, never hide under the big tree. This is the minimum awareness of lightning protection. In addition, you can't stay in high-rise platforms, separate huts, sentry boxes, etc. However, if there is really no place to hide, just squat down with your legs together three meters away from the tree.
Extended data:
The average current of lightning is 30,000 amps, and the maximum current can reach 300,000 amps. The voltage of lightning is very high, about 1 billion to 1 billion volts. The power of medium-intensity thunderstorm can reach10 million watts, which is equivalent to the output power of a small nuclear power plant.
In the process of discharge, due to the sudden increase of temperature in the lightning channel, the air volume expands rapidly, resulting in shock waves and strong lightning. When the charged Lei Yun is close to the protrusions on the ground, a violent discharge will occur between them. There will be strong flash and explosion roar at the scene of lightning discharge. This is the lightning and thunder that people see and hear.
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