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Why the US has so many tornadoes



Hollywood likes tornadoes. Like most things in Hollywood, this is full of drama. The flying cows are little too much, but the scene is indeed somewhat accurate. "I think we are no longer in Kansas." But it makes sense that the tornado started there. Tornadoes are more common in the United States than anywhere else. Throughout Europe, about 300 tornadoes are recorded each year, while the United States records more than one thousand. If we move closer, you will find that most tornadoes in the world occur here, in an area called "Tornado Alley"-a place that is absolutely suitable for cyclones.

Tornado Alley does not have any "official" borders, but it is generally considered to extend from northern Texas to the areas of Oklahoma, Kansas, Nebraska, Colorado and South Dakota. Some people even extend it eastward. Although at least one tornado has been recorded in most states in the United States, the area is indeed a hotbed, mainly because of geographic factors. The uniqueness of the central United States is that the south does have such huge warm waters, and the mountains extending from north to south are also large. Harold Brooks (Harold Brooks) is a senior research scientist at the National Severe Storms Laboratory. He once chased tornadoes, and now he studies tornadoes in the center of Tornado Alley in Norman, Oklahoma.

The tornado needs some special ingredients-the ingredients filled in the tornado alley. First, we need a thunderstorm. To create a thunderstorm, what we need is a low level of humid air, cold and dry air above this level, and some mechanism to raise warm and humid air. In Tornado Alley, a large amount of hot and humid air flows from the Gulf of Mexico into the plains, while cool dry air flows from above the Rocky Mountains in the west. Eventually, the temperature or pressure will change, and the warm air will be lifted into the cold air, forming an updraft.

Once the two meets, the moisture from the warm air begins to condense, forming clouds and starting a thunderstorm. Under normal circumstances, rainwater will fall from these clouds and cool the warm air that breaks the storm, but in the tornado alley, there is a strong air flow from west to east, called jet stream. This is paired with the cool mountain air, blowing the rain away, keeping the air in the updraft warm and humid, which intensifies the storm and brings us a second step: rotating the storm. For this, we need the wind to move at different speeds and directions.

As you can see, there are many in the tornado alley. The air from the bay enters the plains slowly, and at the same time, the rapids from the mountains provide a steady stream of high-flowing fast-flowing air to the east. Because the jet has a faster flow speed and a different direction, it will make the Gulf of Mexico spin like a spinning football underneath. When the rotating air is drawn into the updraft, it will tilt, but will continue to rotate-causing the entire updraft to rotate. Such storms are called "supercells" and they create the main conditions for tornadoes. They are rare, but most common where? . . . You guessed it – Tornado Alley.

As the super cell grows, the spiral upward airflow begins to stretch towards the ground, and effectively draws air into the cyclone. Air rushes in from the side, forming a rotating cloud of dust below, which brings us to the final stage – bringing vertically rotating air to the ground. The third stage is the friction in the tea cup. It's like spinning a tea leaf at the bottom of a cup with a spoon. The tea leaves burst into the center and are pulled up in the middle of the cyclone.

In a real tornado, everything around the cyclone is sucked in – air, dirt, debris, cows. . . As more and more air is sucked in tightly and the pressure increases, the tornado becomes faster and faster. It extends to the ground until it finally encounters a cloud of dust. Then it touches down. We see most tornadoes in the central United States because tornadoes require more ingredients than anywhere else.
The United States is not the only place hit by tornadoes.

Southeast Brazil has the same composition as the tornado alley: cool mountain air from the Andes and warm moisture from the Amazon River. But even so, the frequency of tornadoes still lags behind the United States. Despite suitable conditions, sometimes the geographic location is not completely correct. In South America, the Andes are not as wide as the Rocky Mountains, and the Amazon River is not as water-rich as the Gulf of Mexico because it is land-based.

Most people will not see a tornado in their lifetime, and some will think it is lucky. Others are actively looking for them-those who really started from the right location of Tornado Lane. Just knowing what caused the tornado is not enough to predict when and where it will occur, so if you want to know how meteorologists predict these dangerous storms, check out the documentary tornado season on CuriosityStream.
Why the US has so many tornadoes Why the US has so many tornadoes Reviewed by ViralBlossom on April 23, 2020 Rating: 5

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