A cyclone is a type of natural disaster brought by some atmospheric disturbances in a low-pressure area. It is usually marked by strong violent storms and severe weather conditions. When it is more severe such as an Intense tropical storm, then it could be referred to as Hurricanes over the Atlantic Ocean and Typhoons over the Pacific Ocean.
Cyclos is a Greek work from which cyclone was derived. Literally, it means coiling of snake due to the shape it usually occupies. A tropical cyclone, however, is the deep low pressure where pressure falls from 6 to 8 hectopascal at the center from the surrounding environment.
With the spiraling of strong wind with a speed of 62 kmph or more per hour, the constant wind rotates clockwise in the southern hemisphere and anti-clockwise in the Northern Hemisphere.
Origin of the Cyclone:
The cyclone originates over the sea and makes a journey of about 300km to 500 km daily using heat energy from the sea. Once a cyclone matures properly, it releases energy equivalent to that of a hydrogen bomb. Its diameter varies from one to the other depending on the strength of the cyclone. The Cyclone occupies areas up to 150 to 1000 kilometers but predominantly on the ocean surface.
There five (5) given types of the cyclone. Each is categorized based on the wind speed, the predominant force of the cyclone. The wind speed varies from 60 km per hour to 220 kmph( hectopascal) and more.
A tropical cyclone is a low-pressure wind reaching up to 62 hectopascals. That means once the strength of the wind reaches 62 kmph, around the low pressure it is called a tropical cyclone.
When the wind reaches 89 and 118 Kmph, it is called Severe Cyclone Storm.
When it intensifies up to 119 kmph and 221 kmph, it is termed Very Severe Cyclonic Storm.
Once it exceeds 221 kmph, it is a Super Cyclonic Storm.
The name was given to each based on the strength and the magnitude of the wind.
Eye of a Cyclone.
When a Cyclone matures fully, it develops a broad eye by forming an opening at the center with strong hurricane winds around it. A matured cyclone can be detected by the following characteristics.
- – It forms an eye at the center of Central Dense Overcast (CDO) region of the storm.
- – The eye has a Diameter of about 10-50 km storm.
- – Zones within the eye are usually cloud-free zone, surrounded by thick cloud walls.
- – The eye has a zone of the convective cloud of about 10-15 km thick wall. It is a zone of maximum wind.
- – No rain on regions within the eye. It is practically a clam region.
- – Regions within the eye are warmer than the surrounding region.
- – Presence of lowest surface pressure at the Eye.
- – An open eye of the cyclone indicates very strong winds spiraling around the center.
- – Not all Cyclonic storms may develop an Eye.
- – Sometimes, double Eye is detected, this signifies a very high intensity.
- – The eyewall is the strongest and most dangerous part of the storm.
- – The eye is usually characterized by storm surge, torrential rains, velocity winds.