22 January 2012

How Hurricanes Form

Hurricanes are extremely complex weather systems that can not be formed when several conditions are absolutely perfect at the same time. Even today, the best scientists do not fully understand how hurricanes form, but they often know what is necessary.

Hurricanes get their massive amounts of energy from warm, moist air. A hurricane usually only form when a storm passes over water that is at least 80 degrees Fahrenheit (27 degrees Celsius). In order to have enough hot water to power the hurricane, it should work at least 150 feet deep (46 meters). The conditions of formation of hurricanes typically only between 10 and 30 degrees of the equator and form a majority between 15 and 20 degrees. They are normally on the west coast of Africa.

The warm, moist air rises off the surface of the Atlantic, leaving a condition of low pressure near the surface. Air from adjacent areas moves in this area of ​​low pressure in a swirling motion due to the Coriolis force is strongest near the equator. This new air is also heated by hot water, and also rises, adding to the energy of the hurricane. As the rise of warm, moist air, reached an altitude where it begins to cool, the water in the air condenses and forms clouds. Because of the "swirling" action of fresh air from adjacent areas, the system cloud begins to rotate and thus increase sales. In addition to the prevailing winds, the action of rotation also causes hurricanes to move through the water.

As the storm / hurricane continues to move over the warm waters, this process continues and may increase in intensity if the temperature rises to water and / or humidity of the air increases. When a hurricane moves over land it weakens due to lack of moisture and lack of heat from the surface. While the surface of the earth may actually be warmer than water, it cools rapidly just below the surface to the total heat available is much less. A hurricane can not survive with water temperatures below 79.7 degrees Fahrenheit (26.5 degrees Celsius).

Factors of lesser importance, but important for the formation of hurricanes are wind shear is low, high humidity in general, and a pre-existing weather disturbance (usually storms).

There is no doubt that hurricanes are one of the most dangerous forces and threatening nature on Earth, but they do serve a useful purpose by keeping the Earth's temperature relatively constant by moving heat from the tropics to colder regions to the north. While moving North usually results in considerable weakening, a hurricane can still keep enough energy as a tropical storm to make an enormous amount of heat as far north as Canada!

You may have seen a weather forecast of a typhoon or cyclone and thought they looked exactly like a hurricane. There is actually no difference between them except their location. Hurricanes form on the west coast of Africa and move to Central America, Mexico and the southern United States. While much more rare, hurricanes can also form in the North Pacific Ocean east of the international date or in the South Pacific east of 160E longitude. Typhoons form in the western Pacific Northwest of the deadline. A "tropical cyclone" forms, whether in the southern Indian Ocean east of 90E longitude west or south-west Pacific longitude 160E. A "severe cyclonic Storm" is formed in the Indian Ocean to the north. Finally, a "tropical cyclone" will form in the Indian Ocean southwest. The only real difference between the storms is that those in the northern hemisphere rotate counterclockwise and those of the southern hemisphere rotate clockwise.

Not all hurricanes are similar, however. They are classified in category 1 to 5, with 1 being the weakest storms. A Category 1 hurricane can cause a real mess due to wind and rain, power outages, and even death. A Category 5 hurricane will almost always completely destroy houses, get the power for weeks, and kill thousands of people.