Meteorologists attribute this unusual spike to changing wind patterns. The usual easterly winds that bring moisture have been replaced by hot, dry westerlies, leading to a significant increase in daytime temperatures.
Published Nov 03, 2025 | 12:10 AM ⚊ Updated Nov 03, 2025 | 12:10 AM
Cyclone Montha, which recently crossed the Bay of Bengal, disrupted the easterly flow by drawing it away from the Tamil Nadu coast.
Synopsis: Tamil Nadu is expected to face a spell of intense heat from 3 to 8 November, following several days of rain brought by the northeast monsoon. RMC Chennai said temperatures have risen sharply due to hot, dry westerly winds replacing the usual moisture-laden easterlies, with Chennai already recording 35.5°C at Nungambakkam. Although brief evening showers with thunder and lightning may occur in a few districts, conditions are likely to remain hotter than usual across the state.
After several days of rain brought by the northeast monsoon, Tamil Nadu is set to experience an unexpected rise in temperature this week.
Regional Meteorological Centre, Chennai has forecast a spell of intense heat across the state from 3 to 8 November, marking a sharp contrast to the recent cool and rainy conditions.
In Chennai, the temperature has already reached 35.5°C at Nungambakkam, the highest recorded so far this season and one of the warmest for November in recent years.
Heat-driven convection may trigger light rain accompanied by thunder and lightning in a few districts between Monday and Saturday. However, overall, the weather is likely to remain hotter than usual for this time of the year.
Meteorologists attribute this unusual spike to changing wind patterns. The usual easterly winds that bring moisture have been replaced by hot, dry westerlies, leading to a significant increase in daytime temperatures.
Cyclone Montha, which recently crossed the Bay of Bengal, disrupted the easterly flow by drawing it away from the Tamil Nadu coast.
In addition, higher sea surface temperatures near Sumatra have contributed to the persistence of the heat. These combined factors have created a temporary heatwave across the region.
While the daytime heat is expected to continue through the week, meteorologists say that thunderstorm activity could bring some relief in the evenings.
