Fresh Bay of Bengal System Triggers Heavy Rain Alert Across Southern StatesIndia
21 Oct 2026, 7:09 am (1 hour ago)· 2

Fresh Bay of Bengal System Triggers Heavy Rain Alert Across Southern States

A developing low-pressure system over the southwest Bay of Bengal is set to bring heavy rainfall to southern states until October 26, while northern India experiences an early chill.

A fresh low-pressure area is likely to form over the southwest Bay of Bengal and adjoining parts of the Tamil Nadu coast within the next 24 hours. The India Meteorological Department has projected an active spell of wet weather across several southern regions, driven by this developing weather disturbance. Coastal and interior sectors across peninsular India are slated to witness intensified rain activity along with convective weather over the coming days.

Widespread Downpours Projected Across Southern States

According to official projections, heavy to very heavy rainfall is anticipated across Tamil Nadu, Puducherry, and Karaikal through October 26. In addition, isolated intense spells are expected across Kerala, Mahe, Lakshadweep, Karnataka, coastal Andhra Pradesh, and Rayalaseema. Forecasters note that numerous locations will experience significant precipitation through October 22, with certain areas facing extremely heavy showers. The wet pattern will likely persist in scattered pockets between October 23 and October 26.

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Thunderstorms and Rain Forecast for Island Territories

The weather advisory highlights that the southern belt will face gusty winds, frequent lightning strikes, and thunderstorm activity alongside the downpours. Concurrently, the Andaman and Nicobar Islands are expected to observe widespread rainfall activity from October 21 to October 26, which may influence coastal operations and maritime movements.

Gradual Temperature Drop Across Northern and Eastern India

In stark contrast to the south, the spell of rains has completely halted across north and east India, paving the way for the seasonal onset of autumn chill. Night and early morning temperatures have noticeably dropped across Punjab, Haryana, Delhi-NCR, Uttar Pradesh, Bihar, and Jharkhand, marking a clear transition toward cooler conditions as dry weather prevails.

Questions & Answers

What weather system is developing in the Bay of Bengal?
A low-pressure area is expected to form over the southwest Bay of Bengal and the adjoining Tamil Nadu coastline within 24 hours.
Which southern states have received heavy rain alerts?
Tamil Nadu, Puducherry, Karaikal, Kerala, Mahe, Lakshadweep, Karnataka, coastal Andhra Pradesh, and Rayalaseema face heavy rainfall alerts.
How long will the downpours continue in Tamil Nadu and Puducherry?
The weather department projects heavy to very heavy rainfall spells across these regions through October 26.
What is the forecast for the Andaman and Nicobar Islands?
Widespread rainfall activity is predicted across the Andaman and Nicobar Islands from October 21 to October 26.
What changes are occurring in the weather across northern and eastern India?
Rainfall has halted in states like UP, Bihar, and Delhi-NCR, leading to falling temperatures and the arrival of autumn chill.

Comments 4

Ravikash Gupta@ravikash·35m ago

Hearing about rains in Tamil Nadu instantly reminds me of those Chennai trips when incessant downpours kept us stuck indoors. While the south is pulling out umbrellas and rainboots, stepping into Delhi this morning made it clear that winter is finally knocking.

Arjun Mehta@arjun-mehta·35m ago

Spot on, Ravikash! Chennai's rains and Delhi's chill show just how starkly different the weather can be across the country at the exact same time.

Rohan Verma@rohan-verma·57m ago

Morning and evening chill feels really nice now, hope rains bring some relief down south.

Karan Malhotra@karan-malhotra·57m ago

Rohan, you are right. Last year when I was in Chennai for an investigation, heavy rain just like this brought everything to a halt. Hope things don't get too bad this time.

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