Widespread Rainfall Expected in Tamil Nadu

Weather Forecast for Tamil Nadu

• Event: Anticipated widespread rainfall during Deepavali.
• Rainfall Dates: Expected from October 19 to at least October 24, 2025.
• Rainfall Intensity:
  • Heavy and very heavy rainfall anticipated across multiple districts.
  • Rajapalayam recorded the heaviest with 18 cm.
  • More than 40 locations experienced varying levels of heavy rainfall.

Meteorological Insights

• Weather Influences:

  • Active Northeast monsoon contributing to conditions.
  • A trough between weather systems in the Arabian Sea and Bay of Bengal.
  • Cyclonic circulation over Gulf of Mannar affecting wet weather patterns.

• Low Pressure Areas:

  • A well-marked low pressure in the southeast Arabian Sea is expected to intensify to a depression around Deepavali.
  • Anticipation of another low pressure forming over Southeast Bay of Bengal by October 21 may strengthen by October 23.

Affected Regions

• Expect significant rainfall across 20 districts including:
  • Delta regions and north coastal Tamil Nadu.
  • Anticipated 24 cm rainfall in major areas, notably Chennai and its surroundings on October 22 and 23.

Future Monitoring

• Weather officials, including B. Amudha from the Regional Meteorological Centre, emphasized ongoing surveillance of weather systems for potential intensification and broader impact on neighboring districts as rainfall progresses.

Summary

The situation indicates a notable weather event influenced by low pressure systems, with significant rainfall expected across Tamil Nadu, especially during the festive season of Deepavali, conveying crucial information for disaster preparedness and public safety.