Hurricanes

Cyclone, Catarina, Hurricane

Hurricane, the word comes from Spanish word,”Huracan” which is a further derivation of phrase”Juracan” a god of storm. For a layman every swirling thunderstorm which strikes the land is a hurricane or typhoon as individuals, in the majority of cases come to understand such terms in the information. However, in order to learn the difference, we must learn few essential theories of the tropical cyclones. Hurricanes, typhoons, tropical depressions, cyclones and tropic storms are all the derivative titles for Tropic Cyclones, depending on their strength, size and location. These storms or cyclones are characterized by strong winds, low-pressure facilities and heavy rains.
A hurricane can be differentiated from tropical depression or thunderstorm on the basis of its strength, location and concentration. Whereas, hurricanes and typhoons are moving storm systems with the minimum wind speed of 66 knots or 119 mph, which is potentially catastrophic. A cyclone of these intensity develops an eye, a place in the centre of system having lowest atmospheric pressure. This eye is surrounded by the Eyewall, which may cover an area of 16 to 80 kms and play havoc. Maximum rate of hurricanes has been estimated to around 314 km per hour.
Hurricanes grow usually due to the formation of favorable atmospheric conditions around disturbance in the air. Natural phenomenon such as wildlife capture services, Madden-Julian oscillation and Atlantic Multi-decadal oscillation modulate the background environment. Tropical systems, once born are transferred by fast winds in troposphere under favorable conditions. As the systems move it tends to develop an eye. But if the atmospheric conditions don’t allow, the system gets weak and dissipates. Presently, technology hasn’t been advanced enough to induce dissipation of such storms or a hurricane.
Atmospheric pressure recorded in the middle of hurricanes or the eye is lowest occurring on sea surface of the planet. Condensed latent heat, when released in large amounts, drives the hurricanes and it happens when moist air lifts up condensing its water vapors. The said heat distributes around the storm’s center in a vertical order. For this reason, temperatures inside the hurricanes are usually warmer than the surrounding area.
The eye of a hurricane shouldn’t be taken in literal significance. It’s usually 30 to 120 km in diameters, though smaller hurricanes carry as little as a watch in diameter of 3 km and as large as 360 km. The environment within the eye is generally calm and light compared to its surrounding fast moving winds. For the same reason, hurricanes render more damage to coastal or tropic regions than inland regions. Hurricanes can be lethal at coastal areas going as deep at 1000 kms, whereas it can also cause flooding up to 40 kms from shore. Size of a hurricane can be categorized into three main categories. Hurricanes ranging under 222 kms in radius are termed as”very little”, those that range from 333 to 670 km in radius are termed as”Average” and those larger in radius than 888 kms are categorized as”Very big” hurricanes.
A difference between a typhoon and hurricane should be understood to prevent confusion. Severe tropic cyclones, when born in Northwestern Pacific and obtains high intensity wind speed, it’s called a typhoon. Storms arising from the Southern hemisphere and Indian Oceans are simply known as the Cyclones.
“Bhola Cyclone” at the coasts of Bangladesh in 1970 has been listed as the deadliest one in recorded history in which almost 0.3 million lost their lives. Another destructive storm is Hurricane Katrina in USA, which killed around 2,000 people and rendered an estimated property loss of 100 Billion $. Typhoon Tip which arose in 1979 in Pacific Ocean has been the most intense storm with the pressure of 870 mbar and wind speeds of 310 km/ hour. Hurricane John holds the record of longest lasting hurricane, which lasted for a complete month in 1994 from the northern hemisphere.

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