Hurricanes

Cold Front, Warm Front, Hurricane, Felix

Hurricane, the word is derived from Spanish word,”Huracan” that is a further derivation of word”Juracan” a god of storm. For a layman every swirling thunderstorm which strikes the land is a hurricane or typhoon as individuals, in most cases come to understand such terms in the information. However, in order to learn the difference, we must learn few essential concepts of the tropical cyclones. Hurricanes, typhoons, tropical depressions, cyclones and tropic storms are the derivative names for Tropic Cyclones, depending on their own strength, size and location.
A hurricane can be discerned from tropical depression or thunderstorm on the basis of its strength, concentration and location. Whereas, hurricanes and typhoons are moving storm systems with the minimum wind speed of 66 knots or 119 km per hour, which is potentially catastrophic. A cyclone of these intensity develops an eye, an area in the centre of system with lowest atmospheric pressure. This eye is surrounded by the wildlife nuisance removal service, which can cover an area of 16 to 80 kms and play havoc. Maximum speed 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 atmosphere. Natural phenomenon such as El-NiƱo, Madden-Julian oscillation and Atlantic Multi-decadal oscillation modulate the background environment. Tropical systems, once born are moved by rapid winds in troposphere under favorable conditions. As the systems move it tends to develop an eye. But if the atmospheric conditions do not allow, the system becomes weak and dissipates. Presently, technology has not been advanced enough to induce dissipation of such storms or a hurricane.
Atmospheric pressure recorded in the center of hurricanes or the eye is lowest happening on sea surface of the world. Condensed latent heat, when released in large amounts, drives the hurricanes and it happens when moist air lifts up condensing its own water vapors. The stated heat spreads around the storm’s center at a vertical order. Due to this, temperatures inside the hurricanes are usually warmer than the surrounding region.
The eye of a hurricane shouldn’t be taken in literal significance. It is usually 30 to 120 km in diameters, though smaller hurricanes carry as small as an eye in diameter of 3 km and as large as 360 km. The environment within the eye is generally calm and mild compared to its surrounding fast moving winds. As they receive their energy from warmer oceanic waters, they tend to lose energy when they move on land as they also face greater surface friction in addition to the lack of warmer water. For the same reason, hurricanes leave more damage to coastal or tropic areas than inland regions. Hurricanes can be deadly at coastal areas going as heavy at 1000 kms, whereas it may also lead to flooding up to 40 kms from coastline. Size of a hurricane could be classified 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”Typical” and those greater in radius than 888 kms are categorized as”Very large” 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 end speed, it is 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 recorded as the deadliest one in recorded history in which almost 0.3 million lost their lives. Typhoon Tip which originated in 1979 in Pacific Ocean has been the most intense hurricane having the pressure of 870 mbar and wind speeds of 310 km/ hour. Tip was also the largest cyclone with the storm force winds active in 2170 km diameter. Hurricane John holds the record of longest lasting hurricane, which lasted for a full month in 1994 from the northern hemisphere.

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