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DAILY NEWS ANALYSIS

  • 20 October, 2022

  • 6 Min Read

Storm Sitrang in the Bay of Bengal

Storm Sitrang in the Bay of Bengal

  • The first Tropical Cyclone of the 2022 post-monsoon season, Sitrang, is expected to form in the Bay of Bengal on October 24.
  • Titli was the last October cyclone in the Bay of Bengal in 2018.

About

  • Storms of severe severity emerge in the North Indian Ocean — comprised of the Bay of Bengal and the Arabian Sea — in the months of October-November and May-June, with an average of five developing per calendar year.
  • October has seen 61 storms form in the Bay of Bengal over the last 131 years.
  • In comparison to the Bay of Bengal, the Arabian Sea has only seen 32 storms form in October since 1891.

Important Factors:

  • Following the exit of the Southwest monsoon, increase in ocean heating, resulting in an increase in sea surface temperature over the Bay of Bengal.
  • The availability of atmospheric moisture over the ocean region is also greater.
  • As a result, when leftover systems from the South China Sea approach the Bay of Bengal, they encounter favourable circumstances, facilitating the formation and intensification of cyclones in October."
  • This phenomenon is hampered in some years due to ocean-atmospheric variables.
  • For example, weak La Nina conditions in the equatorial Pacific Ocean prevented cyclonic formation near India's shores in 2020.

Cyclone Sitrang

  • Thailand gave the name Sitrang (pronounced Si-trang), and it is on the list of tropical cyclone names maintained by the Regional Specialised Meteorological Centre (RSMC) from April 2020.

Impacts

  • In the next four days, the current low pressure system will strengthen and march towards India's east coast.
  • Gale winds and heavy rain are forecast mostly over the Andaman & Nicobar Islands, Odisha, West Bengal, and Bangladesh, particularly in coastal districts.

About Tropical Cyclone

  • It is a rapidly rotating storm that forms over tropical oceans and absorbs energy from there to develop.
  • It has a low-pressure centre and clouds spiralling towards the eyewall, which surrounds the "eye," the central region of the storm where the weather is generally calm and cloud-free.

Read Also: Yaas Cyclone

Source: The Indian Express


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