Hurricanes only form over really warm ocean water of 80°F or warmer. As warm air evaporates with moisture it creates low pressure on the surface. This is immediately replaced by cooler air. The process continues, and the resulting moisture filled clouds begin to expand. Thunderstorms with rains form. More warm air rises and the winds begin to move in circular manner, caused by the earth’s rotation. The rising warm air causes pressure to decrease at higher altitudes. The entire system is now in circular motion around a central point. In a couple of days, gale force winds, thunderstorms and heavy rains are in full force at this point forming a tropical storm. The spiral of the hurricane has a calm center called the eye. The eye, is surrounded by a towering and extremely dangerous vertical movement of thunderstorms. This is called the eye wall. The winds of the eye wall is so powerful that it spins and carries huge amounts of ocean water as it moves ashore. The hurricane is now over land and massive destruction is usually inevitable. As the system is no more over water, it eventually seizes out.
There are six stages leading to a hurricane....
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...nited States. It was formed on August 23rd 2005 and lasted an entire week. Katrina caused severe destruction along the Gulf coast from central Florida to Texas, much of it due to the surge and levee failure. There were 1,245–1,836 total deaths and injuries during this time.
Even though hurricanes are the deadliest of natural disasters. They too have some positive impacts to the world. Hurricanes may destroy organisms, but promote their spread by facilitating the dispersal of plant species. Hurricanes deposit vast quantities of seafloor and estuarine sediment as they muscle ashore, accumulations that provide footholds for coastal vegetation communities. The disturbances hurricanes cause to our environment is necessary part as it promotes biodiversity by giving more species the chance to occupy a given ecosystem and maintaining landscape mosaics of greater complexity.
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