Scattered Rains to Persist in Tamil Nadu Until September 21

Fast Summary

• Tamil Nadu experienced widespread thunderstorm activity recently, with rainfall intensity expected to ease by the weekend but continuing in scattered areas.
• A gradual decline in rain, limited to one or two locations, is predicted from September 22, 2025.
• Heavy downpour was reported across north Tamil Nadu over the last 24 hours ending Friday morning (September 19), with Villupuram receiving the highest rainfall at 19 cm, followed by Tirupattur at 17 cm.
• Weather disturbances like upper air cyclonic circulation near North Andaman and a trough across central Bay of Bengal are influencing this rainfall pattern.
• Chennai experienced pleasant weather as thes systems created moderate showers; daily thunderstorms here are common during the Southwest monsoon due to cumulonimbus cloud formations.
• Thunderstorms with gusty winds remain possible for isolated areas until sunday (September 21). Chennai’s day temperature might potentially be around 32°C on Saturday accompanied by moderate rain in some regions.
• The Meteorological department predicts potential formation of a low-pressure system over northeast Bay of Bengal after September 25.

Indian opinion Analysis
Tamil Nadu’s recent heavy rains highlight the important influence of regional weather systems during the transition phase between active and retreating monsoons.While forecasting remains precise sudden intensification-such as cumulonimbus growth-complicates predictions and suggests natural unpredictability inherent to such periods.

For urban centers like Chennai, manageable day temperatures paired with moderate rains provide relief from extreme heat while ensuring sufficient water replenishment for reservoirs-a critical aspect for water-scarce regions like north Tamil Nadu.Looking ahead at expected low-pressure formations post-retreating monsoon phases further underscores preparedness needed statewide especially rural infrastructure vulnerable subjected excess downpours season after observerptember thresholds improvements responsive eco concerns beneficial Read more: The Hindu. IMAGE