A low-pressure system over the southeast Bay of Bengal has intensified into a depression, triggering widespread weather alerts across Tamil Nadu. Heavy rainfall expected today will likely affect daily routines as the weather system strengthens into a severe cyclonic storm by November 17, 2026.
The India Meteorological Department (IMD) projects this system will evolve into Cyclonic Storm Akwan on November 16 before gaining further intensity. Daily commuters and coastal residents across northern Tamil Nadu, Puducherry, and Karaikal need to prepare for sudden shifts in weather conditions.
Key Takeaways
- Depression formed at 5:30 a.m. on Sunday, November 15, moving northwestward.
- Projected to intensify into Cyclonic Storm Akwan by November 16 and a severe cyclonic storm by November 17.
- Rains target north coastal districts, Puducherry, Karaikal, and southern districts.
- No rainfall alerts issued for Andhra Pradesh as of Sunday morning.
IMD Timeline: Low-Pressure Area to Severe Cyclonic Storm Akwan
According to The Hindu's reporting, Saturday's well-marked low-pressure area over the southeast Bay of Bengal moved northwestward. It intensified into a depression by 5:30 a.m. on Sunday, November 15, 2026.
The IMD expects the weather system to move further northwestward over central parts of the south and west-central Bay of Bengal. It is projected to become a cyclonic storm named Akwan, a name proposed by Iran, on November 16. The storm is forecast to intensify into a severe cyclonic storm on November 17.
Where Rainfall Expected Today Will Impact Commuters
Rainfall alerts focus heavily on northern coastal districts of Tamil Nadu, along with Puducherry and Karaikal. During the 24 hours ending at 8:30 a.m. on Sunday, rain was already recorded across Chengalpattu, Chennai, Kancheepuram, and Kanyakumari.
The Regional Meteorological Centre issued a Nowcast alert at 1 p.m. on Sunday, valid until 4 p.m., for light to moderate rain at isolated spots. Target areas include Cuddalore, Chengalpattu, Mayiladuthurai, Nagappattinam, Pudukkottai, Thanjavur, Thiruvarur, Viluppuram, Karaikal, and Puducherry.
While regional entertainment media like Pinkvilla cover cultural trends across southern states, civic authorities are urging full public attention on official weather advisories.
Western Ghats, Southern Districts, and Andhra Pradesh Outlook
Starting Monday, November 16, moderate rain at isolated places is forecasted for the Western Ghats and southern districts of Tamil Nadu. The system is expected to help ease recent rain deficits across coastal belts.
As of Sunday morning, the IMD has not issued specific rainfall alerts for Andhra Pradesh. Official updates for Andhra Pradesh are expected later as tracking models finalize the storm's path.
Actionable Timeline Checklist for Residents and Commuters
- November 15 (Sunday): Depression formed at 5:30 a.m. Nowcast alerts active for Cuddalore, Chengalpattu, Nagappattinam, Thanjavur, and nearby coastal zones.
- November 16 (Monday): System expected to turn into Cyclonic Storm Akwan over central parts of the south Bay of Bengal. Rain spreads to Western Ghats and southern districts.
- November 17 (Tuesday): Storm projected to reach severe cyclonic storm intensity over the Bay of Bengal. Northern coastal districts should prepare for intensified weather.
- Ongoing Monitoring: Daily commuters in Chennai, Puducherry, and Karaikal should track real-time Regional Meteorological Centre updates before traveling.
The rapid strengthening of this Bay of Bengal depression marks a critical shift in regional weather patterns. Early preparation remains essential for residents in low-lying coastal areas and daily travelers.
Stay tuned to official weather bulletins as IMD updates its guidance for Tamil Nadu, Puducherry, and neighboring states over the coming days.
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