The India Meteorological Division (IMD) Tuesday introduced the onset of the Southwest Monsoon over some areas of the Bay of Bengal and Andaman Sea.
“The Southwest Monsoon has superior into some components of the South Bay of Bengal, South Andaman Sea, Nicobar Islands, and a few components of the North Andaman Sea on Might 13,” IMD mentioned, including that the monsoon advance might proceed over the ocean throughout the subsequent three to 4 days.
“Situations are beneficial for additional advance of Southwest Monsoon over some components of South Arabian Sea, the Maldives and Comorin areas, some extra components of the South Bay of Bengal, whole Andaman and Nicobar Islands, remaining components of Andaman Sea and a few components of Central Bay of Bengal throughout subsequent three to 4 days,” mentioned the MeT Division.
In keeping with the Met division, this 12 months’s monsoon rainfall is predicted to be ‘above’ regular, quantitatively 105 per cent of the Lengthy Interval Common of 880 mm.
Mrutyunjay Mohapatra, Director Common, IMD, informed The Indian Categorical that the higher-than-normal minimal temperatures recorded over North India, the presence and strengthening of westerly winds within the decrease atmospheric ranges, the presence and strengthening of easterly winds over the higher atmospheric ranges, early pre-monsoon rainfall accompanied by thunderstorms realised over south peninsular for about 40 days and prevailing higher-than-normal stress over the northwest Pacific Ocean are the important thing components that each one point out an early monsoon onset,.
On the prevailing ocean and atmospheric situations that could be favouring the early monsoon onset, the IMD chief mentioned, “All these components help the early monsoon onset over Kerala. The prevailing wind situations point out strengthening of monsoon winds. Each the Indian climate mannequin and a number of different international climate fashions are in consensus, and counsel a heightened rainfall exercise over Kerala earlier than June 1, which is the conventional onset date.”
This 12 months’s monsoon onset over these areas is the earliest recorded up to now seven years. As per IMD’s monsoon onset schedule, the conventional date for the monsoon onset over the South Andaman Sea is Might 19, whereas the onset over Port Blair within the Andaman and Nicobar Islands is Might 21.
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Since Monday, there was widespread, reasonable to heavy rainfall recorded over just a few locations over the Nicobar Islands, in addition to the widespread rainfall which has continued over these islands throughout the previous two days, which is a crucial criterion fulfilled in direction of the declaration of the monsoon onset.
The Southwest Monsoon is the chief wet season for the nation. Over 70 per cent of the nation receives nearly all of its annual rainfall throughout the June to September season. Yearly, the monsoon winds first arrive over the Andaman Sea and the Bay of Bengal across the third week of Might and additional progress into mainland India.
IMD declares the monsoon onset over India when it hits Kerala, the place the conventional onset date is June 1. By June and mid-July, the monsoon brings steady rainfall earlier than overlaying all the nation by round July 15. This 12 months, the monsoon onset over Kerala is predicted to be early by 5 days and could be round Might 27.
Southwest monsoon onset over the South Andaman Sea and neighbourhood (2019 – 2024)