Chennai and Nearby Districts Brace for Light to Moderate Rain

Fast Summary

• weather Update: Regional Meteorological Center (RMC) has forecast light to moderate rainfall for isolated areas in Chennai, Chengalpattu, Kancheepuram, Tiruvallur, Villupuram, and Ranipet districts until 1 p.m. on September 16, 2025.More rainfall is expected across Tamil Nadu until Thursday (September 18).
• Rainfall Trends: After a dry day on Monday in Chennai city:

– Several areas experienced rainfall around 2 a.m. Tuesday.
– Rainfall measurements from Sunday to monday include: Nungambakkam (42.8 mm), Meenambakkam (10.9 mm), Ennore Port (14.5 mm),Mamallapuram (11 mm),VIT Chennai (17.5 mm).
– Other significant data: Virinjipuram KVK in Vellore recorded the highest at 47 mm; Tambaram received 45 mm; hindustan University registered 46 mm; NIOT Pallikaranai observed 34.3 mm.

• Cause of Rain: Rainfall attributed to an upper air cyclonic circulation over the southeast Bay of Bengal extending up to 3.1 km above mean sea level.

Indian Opinion Analysis

The recent rain spells across Tamil Nadu highlight the influence of regional weather patterns such as cyclonic circulations over adjoining water bodies like the Bay of bengal during monsoon transitions. While offering some respite from dry conditions and potentially aiding water reservoirs’ levels near urban centers like Chennai and Vellore, irregular rain distribution could remain a concern for local agricultural cycles awaiting predictable precipitation shifts.

this week-long spell also underscores the need for advanced preparedness amidst sudden climatic shifts affecting coastal districts vulnerable to heavy downpours and flooding episodes-making more robust drainage systems essential in critical zones prone to water stagnation.

Read more: Regional Meteorological Centre prediction