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Friday 3 April 2020

Cyclone Maha in western States; Bay of Bengal disturbed too

Know the extent of risk you face, the nature of the Indian Ocean, Arabian Sea and Bay of Bengal that causes many a cyclone; how they are named

Editorials

In India

After the twin cyclone in the Arabian Sea, is it the turn of the Bay of Bengal? So far, no direct answer has been given to that question, but the weather department says a deep depression is expected to emerge in the East Mid-Bay in the first week of November. The pressure will gradually increase. However, the meteorologists did not specify whether it would turn into a cyclone. If it does, it could take the shape of Cyclone Maha that originated in the Arabian Sea.

The low pressure is expected to move northwest. The possibility of heavy-to-severe rains is expected in southern Odisha and northern Andhra Pradesh coast from 1 November. Winds will blow at storm-like velocity. It is not clear whether the impact can be felt up to West Bengal.

A severe Cyclone Maha will enter Gujarat from the stretch between Diu and Dwarka on Wednesday night. In those areas, winds can reach speeds up to 120 km/h. Meanwhile, Super cyclone Kyarr has moved towards Somalia under pressure.

Since the 1999 Odisha catastrophe, the Indian governments and local administrations have developed increasingly better ways of prevention of loss of lives, relief and rehabilitation. Cyclone Fani was handled remarkably well.

Super cyclonic storm Kyarr was an extremely powerful tropical cyclone that became the first super cyclonic storm over the North Indian Ocean since Gonu in 2007. It was also the strongest tropical cyclone in the Arabian Sea ever recorded and the second-most intense tropical cyclone in north Indian Ocean history, only behind the 1999 Odisha cyclone.

The seventh depression, fifth named cyclone, and the first, and only super cyclonic storm of the annual season, Kyarr developed from a low-pressure system near the equator. The system organised itself and intensified to a tropical storm on 24 October as it moved eastwards. The storm underwent rapid intensification and reached super cyclonic storm status on 27 October, as it turned westwards.

Cyclone cycle

The 2019 north Indian Ocean cyclone season is the most active season of the type on record in terms of accumulated cyclone energy, surpassing 2007. Furthermore, the season has been very active, with six cyclonic storms, four of them intensifying to very severe cyclonic storms and one to super cyclonic storm Kyarr.

It is an ongoing event in the annual cycle of tropical cyclone formation. The north Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with two peaks in activity in May and November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean.

A well-marked low-pressure area strengthened into a depression on October 30. It later became the fifth Very Severe Cyclonic Storm of the season: Maha.

Naming a storm from seas

Within this basin, a tropical cyclone is assigned a name when it is judged to have reached Cyclonic Storm intensity with winds of 65 km/h. The names were selected by members of the ESCAP/WMO Panel on Tropical Cyclones between 2000 and May 2004, before the Regional Specialized Meteorological Center in New Delhi started to assign names in September 2004.

There is no retirement of tropical cyclone names in this basin as the list of names is only scheduled to be used once before a new list of names is drawn up. Should a named tropical cyclone move into the basin from the Western Pacific, it will retain its original name. The next six available names from the list of north Indian Ocean storm names are Fani, Vayu, Hikaa, Kyarr, Maha (active) and Bulbul (unused).

Pabuk entered the basin from the Gulf of Thailand as a cyclonic storm; its name was assigned by the Japan Meteorological Agency.

With inputs from Wikipedia

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