File photo

(SL Shanth Kumar/BCCL Chennai)

Thursday, November 17: Amidst the ongoing northeast monsoon season, the rainfall activity over parts of South India is likely to receive another boost in the coming days, thanks to the presence of a system in the Bay of Bengal.

As per the India Meteorological Department (IMD), a low-pressure area has formed over southeast Bay of Bengal and the adjoining north Andaman Sea. It is expected to move west-northwestwards and gradually concentrate into a depression over central parts of south Bay of Bengal during the next 48 hours.

Under its influence, the Andaman and Nicobar Islands are likely to receive widespread rains along with isolated heavy to very heavy falls (64.5 mm-204 mm) for the next 24 hours. Strong surface-level winds have also been predicted across the islands.

As the system moves closer to the Indian mainland, it will also start impacting the southern states later this week. Accordingly, isolated heavy rains (64.5 mm-115.5 mm) have been forecast over Tamil Nadu on Sunday and Monday (November 20-21) and Andhra Pradesh next Monday. The wet weather may very well continue throughout next week.

In view of these predictions, the IMD has issued an orange alert over Andaman and Nicobar islands, so as to urge their residents to ‘be prepared’ for rough conditions. On the other hand, both Tamil Nadu and Andhra Pradesh will be placed on a yellow watch (‘be aware’ of local weather) by the end of this week.

Moreover, owing to the rough sea conditions during this forecast period, the fisherfolk have been advised not to venture into southeast BoB and adjoining Andaman Sea on Thursday, into southern BoB on Friday, and into southwest and west-central BoB, along & off south Andhra-Tamil Nadu coasts during from Saturday to next Monday.

Meanwhile, owing to the consistent northeast monsoon rains since the start of this month, Tamil Nadu has registered 160.5 mm rainfall so far this November, marking an ‘excess’ of 45%. Andhra Pradesh, on the other hand, has recorded precipitation worth 45.8 mm — a 31% ‘deficit’ compared to its long-term average for the period between November 1-16.

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