What Causes A Cyclone ?
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Cyclones, hurricanes and typhoons are different types of thunderstorms. Cyclone is also thunderstorm which is severe in nature. It starts building on ocean and sea surfaces. Typically cyclones are caused due to moisture bearing clouds.
When a normal thunderstorm clusters together, it becomes huge and the pressure starts building up. However, within the huge clump of thunderstorms the pressure starts falling. So, basically two planes, one with a higher pressure is clashing with the lower pressure area. This is the ideal circumstance for a cyclone to develop. Most of the cyclones start very small like thunderstorms and then as they travel they gather momentum and more power. When the ocean surfaces heat up to 26 degrees Celsius and there is a lot of humidity, the cyclone gathers strength and keeps getting stronger. If the cyclone has to travel through colder areas, then it would lose all its strength.
Cyclones can also be caused due to huge weather systems like the trade winds. Most of the cyclones that occur in the United States of America come in an anti clockwise motion. They most probably originate in the Gulf of Mexico and so on. They start out as disturbances in low pressure areas and then gain magnitude. When we look at satellite images of a cyclone, they are winds that are rotating anti clockwise. They look like spirals that are going in and centering down on a place. The Northern hemisphere and Southern hemisphere can have cyclones at the same time, and they both are caused due to opposite acting pressure.
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