Southern States Brace for Heavy Downpours and Strong Winds as Bay of Bengal System DevelopsWest Bengal
21 Oct 2026, 7:18 am (1 hour ago)· 2

Southern States Brace for Heavy Downpours and Strong Winds as Bay of Bengal System Develops

A developing low pressure system over the Bay of Bengal is set to trigger intense rainfall across southern states until October 26, even as snowfall in the north ushers in early winter conditions.

Atmospheric conditions across India are displaying a sharp contrast as northern mountain belts experience seasonal snowfall while peninsular regions prepare for another intense spell of precipitation. High-altitude sectors in Jammu and Kashmir alongside Himachal Pradesh have recorded fresh snowfall, dragging down daily temperatures and marking the onset of colder weather across northern plains. Concurrently, maritime disturbances in the south are gathering strength, raising alarms for widespread wet weather across several coastal and inland pockets.

Low-Pressure Area Triggers Southern Rain Alert

A fresh low-pressure zone is slated to develop within 24 hours over the southwest Bay of Bengal, positioned closely off the Tamil Nadu coast. Because of this brewing system, widespread precipitation is anticipated across Tamil Nadu, Puducherry, and Karaikal through October 26. In addition, the stormy pattern is projected to stretch across South Interior Karnataka, Coastal Andhra Pradesh, Lakshadweep, Kerala, Yanam, Rayalaseema, and Mahe between October 21 and October 26.

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During this multi-day wet phase, surface winds are forecast to sustain speeds between 40 and 50 km/h across affected areas. Some isolated coastal stretches could witness gusty surges reaching up to 60 km/h, posing disruption risks to offshore operations, localized transit, and daily routines.

Yellow Alert Issued for 17 Tamil Nadu Districts

Authorities have instituted a yellow alert until October 23 covering 17 key districts across Tamil Nadu to caution residents against lightning and heavy rainfall. Among the locations placed under vigilance are Chennai, Tiruvallur, Chengalpattu, Kanchipuram, Cuddalore, and Tiruchi. Severe thunderstorms coupled with lightning strikes and turbulent gusts clocking 40 to 50 km/h are projected to batter these regions, prompting civic preparations for waterlogging and traffic diversions.

Questions & Answers

How long will the Bay of Bengal low-pressure system affect Tamil Nadu?
The low-pressure area developing over the southwest Bay of Bengal is expected to sustain heavy rains in Tamil Nadu, Puducherry, and Karaikal through October 26.
Which southern regions are forecast to receive heavy precipitation?
Heavy rainfall is expected across South Interior Karnataka, Coastal Andhra Pradesh, Lakshadweep, Kerala, Yanam, Rayalaseema, and Mahe between October 21 and October 26.
How many districts in Tamil Nadu are on yellow alert?
A yellow alert has been placed on 17 districts until October 23, including Chennai, Tiruvallur, Chengalpattu, Kanchipuram, Cuddalore, and Tiruchi.
What wind speeds are expected during this weather spell?
Sustained wind speeds are projected between 40 and 50 km/h, with occasional gusts reaching up to 60 km/h in isolated pockets.
What is causing the sudden drop in temperature across North India?
Recent snowfall across the mountainous belts of Jammu and Kashmir and Himachal Pradesh has caused early winter temperatures across northern plains.

Comments 5

Amit Patel@amit-patel·14m ago

Rain in the south and cold in the north, experiencing both extremes of weather at once.

Arjun Mehta@arjun-mehta·36m ago

Got stuck for four hours heading home during similar rains in Chennai last year. Seeing reports of snowfall up north right alongside this just reminds you how extreme India's weather swings can get.

Ravikash Gupta@ravikash·36m ago

Arjun, you're so right, the weather really shows multiple shades! By the way, has the local administration made any solid arrangements to tackle waterlogging in Chennai this time?

Karan Malhotra@karan-malhotra·58m ago

With such strong winds and heavy rain hitting South India, has the administration made any preparations to evacuate people from low-lying areas?

Rohan Verma@rohan-verma·57m ago

Karan, local administrations rarely move fast enough before things get out of hand. Usually, we only see paperwork until the water is already rising.

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