Chennai Rains: Heavy Rains Lash KTCC; Kasimedu, Korattur Suburbs Drenched

Chennai and several parts of the Kanchipuram-Tiruvallur-Chennai-Chengalpattu (KTCC) belt witnessed heavy downpours on Sunday evening, bringing relief from the sweltering heat but also leading to reports of waterlogging in low-lying areas.

According to weather experts, light drizzles are expected to continue in the southern suburbs of the city and parts of Chengalpattu, triggered by stratiform clouds. This pattern of scattered daily showers across the KTCC region is likely to persist, while leeward areas remain largely dry.

Localities such as Kasimedu, Korattur, Ayappakam, Manali, Anna Nagar West, Tondiarpet, Patravakkam, Athipet, Puzhal, Madhavaram, Kelambakkam, Mamallapuram, and several parts of Chengalpattu district reported heavy rainfall on Sunday.

Low-Pressure System in Bay of Bengal

Meanwhile, the Regional Meteorological Centre (RMC), Chennai, confirmed the formation of a low-pressure area over the Bay of Bengal. At 8.30 am on Sunday, the system was observed over the west-central and adjoining northwest Bay, off the coasts of north Andhra Pradesh and south Odisha.

The low-pressure system, influenced by an upper-air cyclonic circulation up to 9.6 km above sea level, is tilting southwest with height. The RMC has forecast that it will move west-northwest, intensify into a depression within 24 hours, and cross the south Odisha-north Andhra Pradesh coasts by Tuesday forenoon (August 19).

Extended Weather Pattern

In addition, an east-west trough is currently active, stretching from the cyclonic circulation over the northwest Bay of Bengal (off Andhra and Odisha coasts) to the northeast Arabian Sea and south Gujarat-Konkan, cutting across North Marathwada.

This trough is further linked to the systems over Vidarbha, South Chhattisgarh, and South Odisha, fueling widespread instability across central and eastern India.