Northeast monsoon intensifies across Tamil Nadu; heavy rainfall expected through late October

The northeast monsoon is gaining considerable momentum across Tamil Nadu, triggering another spell of significant rainfall over Chennai and surrounding regions. Meteorological authorities have documented the formation of a low pressure system over the southwest Bay of Bengal adjacent to the Tamil Nadu coast during the early morning hours of October 21, intensifying precipitation patterns across the state.

According to the India Meteorological Department observations, the wet weather system is expected to maintain its intensity through October 26, 2026, with no immediate signs of abatement. Chennai and other coastal districts face the brunt of the advancing monsoon circulation, with successive rounds of downpours anticipated over the coming days.

The northeast monsoon, which typically sets in during October-November, plays a crucial role in replenishing water resources across Tamil Nadu and neighbouring regions. However, the current spell has already prompted weather advisories for residents and authorities to exercise caution, particularly in low-lying areas prone to waterlogging and flooding.

Meteorological agencies continue to monitor the evolving weather system closely, with updates expected as the low pressure area progresses. Residents have been advised to remain prepared for sustained rainfall and associated impacts on daily activities and transport networks throughout the forecast period.