While India was just getting over the peril caused by Cyclone Tauktae which hit the country last week, another Cyclone Yaas emerging from the Bay of Bengal is expected to hit the country on its Eastern Coastline on 26th May 2021. While the regions likely to get affected by Cyclone Yaas include Andhra Pradesh, Tamil Nadu, Odisha, West Bengal, and Andaman Nicobar.
Since the headlines are much covered with the word Cyclone, in this article further, we will know about how does a Cyclone forms, but before that, let’s know what a cyclone is.
As per Meteorology, the term Cyclone is referred to as the rapid inward circulation of air masses about a low-pressure centre which circles counter-clockwise in the northern hemisphere and clockwise in the southern hemisphere.
Cyclones are usually formed in a low-pressure area, while the topography, intensity, and frequency of cyclones with which a cyclone strikes a coast depend upon the vulnerability of the place.
The temperature difference between the warm and cooler environment causes the air to rise and become buoyant and rise in the upward direction. The high-pressure area then files the air in the low-pressure area. The cycle continues as the warm air from the high-pressure area rises constantly and a low-pressure area gets filled with cool air and builds up over a period of time.
Now the warm and moist rises and colls down the water droplets in the air, which forms clouds. And the whole system of clouds and wind spins and rises and intensifies constantly by the ocean’s heat as well as water evaporating from the ocean surface, which causes a Cyclone.
Sufficient warm temperature at the sea surface
The impact at the area of Coriolis force to develop a low-pressure area
High Humidity in the lower to middle levels of the Troposphere
A pre-existing low-level focus or disturbance
Low vertical wind shear