What happened
A south Bay of Bengal low-pressure area is forecast to deepen on 25 October and become a cyclonic storm over the west-central Bay by Monday morning, 26 October.
Why it matters
Heavy rain falls across Tamil Nadu, Puducherry, Karaikal, Kerala and Mahe on 25 October, and South Bengal should expect wet squalls with gusts near 40 km/h from 28 October.
Remember this
Coastal AP and south Odisha should watch for the storm from 27 October.
More context & who is affected
A weak disturbance over the south Bay of Bengal should strengthen into a deep depression on Sunday and pick up further to a cyclonic storm over the west-central waters by Monday, 26 October.
Heavy and very heavy showers are likely across Tamil Nadu, Puducherry, Karaikal, Kerala and Mahe today, with locally heavier downpours possible at isolated spots.
Afterwards the system is expected to track toward the north Andhra Pradesh and adjoining south Odisha coasts, while South Bengal faces wet squalls and winds near 40 km/h from 28 October.
- Cyclonic storm expected by
- 26 Oct (morning) A south Bay of Bengal low deepens into a depression on 25 Oct and is expected to become a cyclonic storm over the west-central Bay by the morning of 26 Oct.NDTV ProfitMint
- South Bengal wind gusts
- 40 km/h Wind gusts of about 40 km/h are expected during wet squalls across South Bengal districts starting 28 Oct, with heavier showers in coastal and western districts.Mint
Timeline
IMD's forecast window for the developing system, 25 to 28 October.
- 25 Oct - South Bay of Bengal low deepens into a depression; heavy rain hits Tamil Nadu, Kerala, Mahe and Puducherry.
- 26 Oct - Storm expected to form over the west-central Bay of Bengal by morning.
- 27-28 Oct - System approaches the north Andhra Pradesh and south Odisha coasts with heavy rain.
- 28 Oct onward - Wet squalls across South Bengal districts, with gusts near 40 km/h.
Commuters · Travelers
Commuters in Tamil Nadu, Puducherry, Karaikal, Kerala and Mahe should expect heavy to very heavy rain on 25 October, with possible disruption to travel and outdoor plans.
Fishermen
Residents of north Andhra Pradesh and south Odisha should watch for coastal flooding and strong winds once the storm tracks toward the coast after 26 October.
General Public
South Bengal can see wet squalls with gusts near 40 km/h from 28 October, likely to unsettle outdoor work and evening travel.
Reporting fromEconomic Times ↗NDTV Profit ↗Mint ↗
Sources & verification3 sources · 4 claims
These are the records behind this briefing. Linked reporting is not the same as independent confirmation.
- Economic TimesReporting
India Weather October 25: Heavy rain alert for Tamil Nadu, Kerala; check IMD's state-wise forecast ↗
· Accessed Oct 25, 2026 - NDTV ProfitReporting
Heavy Rain Alert For Tamil Nadu, Karnataka; IMD Warns Of Cyclonic Storm On October 26 ↗
· Accessed Oct 25, 2026 - MintReporting · Accessed Oct 25, 2026
Claims and linked sources
IMD expects the south Bay of Bengal low to strengthen into a cyclonic storm over the west-central waters by the morning of 26 October, after deepening on 25 October.
The system is forecast to move west-northwestwards toward the north Andhra Pradesh and adjoining south Odisha coasts, with heavy rainfall likely from 27 to 28 October.
Heavy and very heavy rainfall is forecast on 25 October over Tamil Nadu, Puducherry, Karaikal, Kerala and Mahe, with locally heavier showers at isolated places.
Wet squalls are forecast over all South Bengal districts from 28 October, with wind gusts approaching 40 km/h and heavier showers in coastal and western districts.
