Heatwave Conditions in Tamil Nadu

Weather and Climate Overview - Tamil Nadu Monsoon and Heatwave

Heatwave Conditions:

• Conditions of abnormal heatwave persisting over interior Tamil Nadu due to:
  • Weak Southwest monsoon circulation.
  • El Niño-induced atmospheric subsidence.
• Significant temperature records:
  • Vellore: 41.6°C, highest in the state on reporting day.
  • Other locations like Madurai and Tiruttani also exceeded 40°C.
  • Chennai:
    • Nungambakkam recorded 39.4°C, the highest for July since 2019.
    • Previous high in Nungambakkam: 40.4°C on July 5, 2019.
    • Meenambakkam recorded a high of 40.1°C.

Meteorological Predictions:

• Improvement in rainfall expected from the second half of the week (July 16 onwards).
• Heatwave warnings issued for 19 districts including:
  • Vellore
  • Kancheepuram
  • Erode
  • Salem
  • Madurai
• Forecast indicates temperatures could remain 2-4°C above normal in some areas during peak heatwave days.

Monsoon Revival Factors:

• Anticipation of revival due to:
  • Strengthening of the Somali Jet, which carries moisture from the Arabian Sea.
  • A weather system over northwest Bay of Bengal expected to enhance rainfall.

Official Statements:

• V.R. Durai, Head of Regional Weather Forecasting Centre, provided updates on weather patterns.
• Indications suggest the revival of monsoon, albeit weak, will improve cloud cover and potentially moderate temperatures.

Implications for Agriculture and Public Health:

• Prolonged heatwave conditions can impact crop health and electricity demands (increasing AC usage).
• Public health advisories may be necessary to address potential heat-related illnesses.

Recommendations for Exam Preparation:

• Understand the connection between climate patterns (El Niño) and weather anomalies.
• Recall temperature records and implications for local agriculture and health systems.
• Familiarize with the functioning of the Regional Meteorological Centre and its role in forecasting.

This summary highlights key meteorological data, reasons behind extreme weather conditions, and future expectations—essential for understanding regional climate challenges and their socio-economic impacts.