Depression Over Bay Of Bengal To Weaken: Heavy Rainfall To Ease Out Shortly
Satellite Imagery: Mosdac.gov.in
Key Takeaways
- The remnant of Cyclone Ditwah remains a depression near Chennai after an unusual southwestward drift.
- Rainfall is expected to ease gradually over North Tamil Nadu, South Coastal Andhra Pradesh, and Rayalaseema.
- Cloud bands remain offshore due to southwesterly steering winds, limiting inland penetration.
- The system will weaken further into a low-pressure area and eventually dissipate by 6 December.
The remnant of Cyclone Ditwah is placed as a depression in the Southwest Bay of Bengal, off the Tamil Nadu coast. The system is centered almost east abeam of Chennai, maintaining close proximity to the coastline. The depression precariously recurved in the past 24 hours to come closer to the coast. As not very commonly seen, the system moved southwestward, albeit at a snail’s pace, to remain positioned very close to the capital city Chennai. It is likely to meander over the same area for another 12–18 hours, losing strength and possibly getting subsumed in the normal northeasterly monsoon flow along the coastline. Consequently, the rains are likely to ease out over North Tamil Nadu, South Coastal Andhra Pradesh, and Rayalaseema.
Most of the cloud clusters associated with the depression are placed over the ocean and the fringes of the coastal areas. With the steering winds being southwesterly, these clouds are unlikely to get pushed deep inland over North Tamil Nadu and Andhra Pradesh. Still, the close proximity to the coastal region makes it vulnerable for some pockets. Along with Chennai, the places at risk of rough weather include Tiruvallur, Kancheepuram, Vellore, Chengalpattu, Tambaram, Nellore, Ongole, Bapatla, and extending till the outskirts of Kakinada and Machilipatnam.
The depression will weaken into a well-marked low-pressure area anytime soon over the same region. Moving further close to the coast, the features will get eroded and may persist as a cyclonic circulation till tomorrow morning. The weather activity will recede considerably after about 12 hours from now and the system is expected to fill up very close to the existing location. Light to moderate rain and thundershowers are likely along the Tamil Nadu coastline tomorrow and the day after, more as a part of seasonal northeast monsoon activity. Broad clearance is expected over the area from 06 December 2025.
