What is the maximum level of tornado?

Tornadoes are divided into five grades (Fujita grade /F grade), namely F 1, F2, F3, F4 and F5. F 1 Tornado is small in size and weak in wind; F5 tornado has a huge scale, strong wind and great destructive power.

Tornado is a strong wind vortex accompanied by a funnel-shaped cloud column rotating at high speed. The wind speed near the tornado center can reach 100 m/s to 200 m/s, with a maximum of 300 m/s, which is several times larger than the maximum wind speed near the typhoon center. The central air pressure is very low, generally as low as 400 hectopascals and as low as 200 hectopascals. It has a great sucking effect and can suck the sea. Commonly known as "dragon with water". Because the air inside the tornado is extremely thin, the temperature drops sharply, which promotes the rapid condensation of water vapor, which is an important reason for the formation of funnel cloud column. The average diameter of the funnel cloud column is only about 250 meters. Tornadoes are produced in strongly unstable cumulonimbus clouds. Its formation is related to the strong rise of warm and humid air, the southward movement of cold air and topography. Its life history is very short, usually lasting ten minutes to an hour or two, but its destructive power is amazing.

What is the maximum level of tornado?

Definition of tornado grade: F0(33m/s) slightly damages shallow-rooted trees, pulls up bicycles and other small machinery to blow away tens of meters of F 1 (33 ~ 50/s) moderately damages, and lifts up roof tiles and mobile houses to blow away moving small cars F2 (50 ~ 70m/s). Seriously damaged, lift the roof, destroy the trailer, overturn the trees in the train carriages, uproot the boxes in the air and fly wildly. Small cars were lifted off the ground F3 (70 ~ 92m/s), which seriously damaged the roofs and walls of solid houses and overturned the whole train. Most trees in the forest are uprooted, and large and medium-sized cars or trucks are hoisted off the ground F4 (92 ~ 127m/s). Completely destroyed and solid house frames were blown away, buildings with weak foundations were blown away, and heavy trucks were thrown into the air. 80% of the objects on the ground have been overturned. F5 (127 ~147m/s) is destructive. Chaos, terror, darkness, doomsday, solid houses were razed to the ground. The flying distance of super-large objects or heavy trucks in the air is about 140m, and the destructive power reaches 100%.

How strong is the tornado?

Tornadoes are classified into 0-5 grades of enhanced Fujita series according to their damage degree, referred to as EF grade, which was proposed by Dr. Fujita Tetsuya of the University of Chicago in 197 1 year.

EF0 level

Although the wind speed 104 km/h- 137 km/h is weak, it is still enough to blow off branches, roll up lighter fragments and break glass, and some chimneys will be blown off. (The probability of occurrence is extremely high, 70%-95%)

EF 1 grade

The wind speed is 138 km/h- 177 km/h, and they can blow away roofs and overturn prefabricated houses, and some lighter cars will be blown over or scraped off the road. (High probability of occurrence, 50%-70%)

EF2 level

Wind speed 178 km/h-2 17 km/h, they can blow the heavy licorice bags hundreds of meters away, uproot a big tree, and trucks can scrape off the road. (The probability of occurrence is moderate, 40%-50%)

EF3 level

The wind speed is 2 18km-267km per hour. They can blow down a heavy car, blow trees off the ground, destroy more than half of the houses and derail the train. (The probability of occurrence is moderately high, 40%-60%)

EF4 level

The wind speed is 268-330 kilometers per hour. They can be blown away by cars, raze solid houses to the ground and blow down trees hundreds of meters high. (The probability of occurrence is moderately low, 30%-45%)

EF5 grade

EF5 wind speed exceeds 330 kilometers per hour, houses are completely destroyed, cars are all blown away, pavement asphalt is also blown away, and trucks, trains and trains are all off the ground. (The probability of occurrence is low or high, 20%-45%)

Tornado is not EF6. That's absolutely impossible, it's based on physics and meteorology, so don't believe there is an EF6 tornado, it's fiction.

What level of wind is a tornado?

Classification of Tornadoes The classification of tornadoes is based on Fujita series, which was put forward by Fujita Tetsuya, a Japanese-American meteorologist at the University of Chicago, in 197 1 year. F0 wind speed

What is the highest level of tornado?

Tornadoes are not calculated according to the order of 1- 17, because this extremely destructive and disastrous weather range is small and rare.

Tornadoes have their own attractions.

Tornadoes are divided into five grades (Fujita grade /F grade), namely F 1, F2, F3, F4 and F5. F 1 Tornado is small in size and weak in wind; F5 tornado has a huge scale, strong wind and great destructive power.

How many winds are there in a tornado?

Tornadoes are classified into 0-5 grades of enhanced Fujita series according to their damage degree, referred to as EF grade, which was proposed by Dr. Fujita Tetsuya of the University of Chicago in 197 1 year.

EF0 level

Although the wind speed 104 km/h- 137 km/h is weak, it is still enough to blow off branches, roll up lighter fragments and break glass, and some chimneys will be blown off. (The probability of occurrence is extremely high, 70%-95%)

EF 1 grade

The wind speed is 138 km/h- 177 km/h, and they can blow away roofs and overturn prefabricated houses, and some lighter cars will be blown over or scraped off the road. (High probability of occurrence, 50%-70%)

EF2 level

Wind speed 178 km/h-2 17 km/h, they can blow the heavy licorice bags hundreds of meters away, uproot a big tree, and trucks can scrape off the road. (The probability of occurrence is moderate, 40%-50%)

EF3 level

The wind speed is 2 18km-267km per hour. They can blow down a heavy car, blow trees off the ground, destroy more than half of the houses and derail the train. (The probability of occurrence is moderately high, 40%-60%)

EF4 level

The wind speed is 268-330 kilometers per hour. They can be blown away by cars, raze solid houses to the ground and blow down trees hundreds of meters high. (The probability of occurrence is moderately low, 30%-45%)

EF5 grade

EF5 wind speed exceeds 330 kilometers per hour, houses are completely destroyed, cars are all blown away, pavement asphalt is also blown away, and trucks, trains and trains are all off the ground. (The probability of occurrence is low or high, 20%-45%)

Tornado is not EF6. That's absolutely impossible, it's based on physics and meteorology, so don't believe there is an EF6 tornado, it's fiction.

How many tornadoes are there in Yancheng?

The "June 23rd" tornado in Yancheng was EF4, and the wind force exceeded 17.

Zheng Yongguang, chief of the Strong Weather Forecast Center of the National Meteorological Center, told reporters on the 26th that after field investigation, the typhoon disaster in Yancheng, Jiangsu Province has been confirmed as a tornado. Ten experts unanimously determined that the tornado level was EF4, and the wind force exceeded 17. Tornado is EF4, the wind force exceeds 17, and the estimated wind speed reaches an astonishing 73m/s. ..

Yang Jinbiao, deputy director of the Jiangsu Meteorological Bureau, said that tornadoes are divided into six levels, with the lowest being EF0 and the highest being EF5. The intensity of the tornado is close to the highest level. At present, 17 is the highest level in the wind classification, but the wind force of this tornado exceeded 17.

How many levels of tornadoes are there?

Tornadoes are not classified, only wind speed. The wind speed may be 50- 150 meters per second, and in extreme cases it may even reach 300 meters per second or exceed the speed of sound.

Feng Juan got its name because it is very similar to the East China Sea Dragon that jumped out of the waves in ancient mythology, and it has many aliases, such as "dragon absorbs water", "dragon wags its tail" and "upside down dragon".

Now we know that a tornado is a circular column of air that rotates violently. Its upper end is connected with thunderstorm clouds, its lower end is suspended in mid-air, and some directly extend to the ground or water surface, and move forward while rotating. It happens at sea, just like the phenomenon of "dragon absorbing water", which is called "waterspout"; Tornadoes that appear on land, roll up dust and take away houses, trees, etc. , known as the "land tornado". From a distance, it is not only like a huge python dangling in the air, but also like the nose of an elephant that keeps swinging.

How did this big "trunk" come into being?

Tornadoes in nature were born in thunderstorm clouds. In thunderstorm clouds, the air disturbance is very intense, and the temperature difference between the upper and lower parts is very large. On the ground, the temperature is more than 20 degrees Celsius. The higher the altitude, the lower the temperature. At the top of the cumulonimbus cloud at an altitude of more than 8 thousand meters, the temperature is as low as MINUS 30 degrees Celsius. In this way, the cold air above drops rapidly, and the hot air below rises violently. When the updraft reaches high altitude, if it encounters strong horizontal wind, it will force the updraft to "upside down" (rotate downward). Due to the alternating disturbance at high altitude, it rotates and forms many small eddies. These small eddies gradually expand. The agitation became stronger and stronger, and finally a large vortex was formed. The large vortex first rotates around the horizontal axis, forming a horizontal air rotating column. Then, the two ends of the air rotating column gradually bend and slowly hang down from the bottom of the cloud. For the direction of cumulonimbus clouds, the cloud extending from the left is called "left tornado" and the cloud extending from the right is called "right tornado"; The former rotates clockwise and the latter rotates counterclockwise. Generally, the right tornado reaches the ground, and the left tornado has little chance to reach down.

In addition, tornadoes are also prone to occur at the intersection of two squall lines. Squall lines often appear in the most "outpost" of strong cold air in hot seasons.

When there is a tornado, there is often more than one. Sometimes two or more "trunk" funnel cloud columns will appear in the same cumulonimbus cloud. Only some "trunk" has just started to extend downward, some "trunk" lower end has landed or is shrinking into the cloud after landing, and some stretch and contract at the bottom of the cloud and never land again.

Tornadoes have a small range, with an average diameter of 200-300 meters; The smallest diameter is only tens of meters, and only a few large diameters reach 1000 meters. Its life is also very short, often only a few minutes to dozens of minutes, no more than a few hours. Its average moving speed is15m per second, and the fastest speed can reach 70m. The length of the moving path is mostly around 10 km, the short path is only tens of meters, and the long path can reach hundreds of kilometers or more. The ground width caused by it is generally only l-2 kilometers.

Tornadoes are extremely grumpy. Wherever you go, the roar is like thunder, which is better than the low-flying fleet. This may be because the wind speed in some parts of the vortex exceeds the sound speed, resulting in a small amplitude shock wave. What is the wind speed of a tornado? People can't measure it yet, because any anemometer can't stand its destruction. Generally speaking, the wind speed may be 50-150m per second, and in extreme cases it may even reach 300m per second or exceed the speed of sound.

Supersonic wind energy can generate infinite power. 1896, a pine stick carried by a tornado in St. Louis, USA, actually penetrated a steel plate with a thickness of one centimeter. 1 19 19 A tornado occurred in Dazhou, Minnis, USA, which made a thin grass stalk pierce a thick board. A clover leaf is deeply embedded in the mud wall like a wedge. However, the wind speed in the center of the tornado is very small or even windless, which is very similar to the situation in the eyes of a typhoon.

What is particularly frightening is the low pressure inside the tornado. The low pressure can be as low as 400 mbar or even 200 mbar, and the standard atmospheric pressure is 10 13 mbar. Therefore, the place swept by a tornado, like a special water pump, often sucks up the water, dust and trees it comes into contact with, forming a tall column, which is what people used to call "the dragon hangs upside down" or "the dragon sucks water". Yu Yu, Blood Rain, Grain Rain, etc. It is formed when tornadoes bring some colored substances or other substances on land and fish in the sea into the sky, move them to a certain place, and fall to the ground with heavy rain. & gt

What level is the tornado?

Tornadoes are divided into five grades (Fujita grade /F grade), namely F 1, F2, F3, F4 and F5. The tornado of F 1 is small and weak enough to lift the roof and pull down the trailer. The wind speed in the center of the vortex is between 73 miles per hour and 1 12 miles, and the wind speed in F2 is between 1 13 miles and 150 miles, which is enough to overturn the van, and the wind speed in F3 is as high as 260 miles. Flying a few hundred yards away, the most frightening thing is the unimaginable F5, which is enough to lift off solid houses, and reinforced concrete and other reinforced buildings will be torn to pieces. The tornado in Luo Qiao County, Texas1May 1997 belongs to this category, with the wind speed as high as 3 18 miles. The tornado was more than one kilometer in diameter and caused hundreds of millions of dollars in losses to the United States. Tip: If the English unit "1 mile" is converted into several kilometers per hour, it must be multiplied by 1.6. For example, the wind speed is 1 12 miles, which is converted into kilometers. Multiply12 miles by 1.6 to reach the speed of 180 kilometers per hour.

How big is the biggest tornado that has ever appeared in the world?

Tornado is a strong, small-scale air vortex, and its scale is very small, generally around 100 meters. It is often caused by strong air convection under extremely unstable weather conditions, and the wind power can reach more than 12. The surface wind speed of the strongest tornado is between110-200m/s. When a tornado occurs, there is always a funnel with a diameter from tens of meters to hundreds of meters hovering from the bottom of the convective cloud, and some can reach the ground. The wind that causes disasters on the ground is called a tornado. Some do not reach the ground or produce disastrous winds on the ground, which is called air funnel; Some reach the surface and are called waterspouts.

When tornadoes appear, they are usually accompanied by thunderstorms and hail. The difference between it and general gale is that the central air pressure is low and the wind is strong. Huge destructive power. The horizontal range of tornadoes is very small, ranging from tens of meters to hundreds of meters in diameter, and the maximum is about 1000 meters. The time from occurrence to dissipation is very short, usually lasting only a few minutes, but the longest is only a few minutes, and the affected area is also very small. However, it can cause crops and trees to be destroyed instantly, traffic and communication to be interrupted, houses to collapse, human and animal casualties and other heavy losses.