A sudden transition in atmospheric conditions has unleashed intense rain across several southern states, with Tamil Nadu and Kerala experiencing widespread thunderstorms from early morning hours. Weather authorities have projected very heavy downpours for Thursday, October 22, covering Tamil Nadu, Puducherry, Karaikal, Mahe, and parts of Kerala. Heavy rainfall is also anticipated in Andhra Pradesh and Lakshadweep, while widespread lightning strikes and wind speeds ranging from 40 to 50 km/h, gusting up to 60 km/h, are expected across Tamil Nadu, Karnataka, Kerala, Andhra Pradesh, Telangana, and the Andaman and Nicobar Islands.
Atmospheric Driver in the Bay of Bengal
The primary trigger behind this prolonged precipitation spell is a well-marked low-pressure area that has developed over the southwest Bay of Bengal, lying close to the Tamil Nadu coastline. This atmospheric system is dragging abundant oceanic moisture directly into the southern peninsula. Consequently, an orange alert has been enforced for Tamil Nadu and Kerala to warn of potential flooding and severe disruptions. Isolated heavy rainfall accompanied by intense lightning strikes is also forecast across South Interior Karnataka, Coastal Andhra Pradesh, Yanam, and Rayalaseema.
Districts on High Alert Across Kerala
The India Meteorological Department has segregated Kerala into high and moderate warning zones based on anticipated rain volumes. An orange alert is currently in effect across five southern and central districts: Thiruvananthapuram, Kollam, Pathanamthitta, Alappuzha, and Kottayam, signifying that very heavy precipitation could cause rapid surface runoff and localized waterlogging. Meanwhile, five other districts including Idukki, Ernakulam, Thrissur, Palakkad, and Malappuram remain under a yellow alert. These regions are projected to receive between 64.5 mm and 115.5 mm of rainfall within a 24-hour window.
Forecast for Island Territories and Eastern Coast
The influence of this weather mechanism extends far into maritime regions. The Andaman and Nicobar Islands are forecast to receive heavy to very heavy spells of precipitation spanning from October 22 through October 27. Additionally, the coastal state of Odisha is expected to witness rainfall between October 26 and October 27 as the regional wind patterns shift. Residents across the southern peninsula have been cautioned against venturing into open fields during active thunderstorm periods due to the heightened risk of lightning.
Stable Conditions in Northern and Central Regions
In sharp contrast to the turbulent conditions across the south, vast tracts of the country will experience steady and dry atmospheric conditions. No major meteorological shifts are predicted for Northwest India, Central India, West India, or Northeast India throughout the current week. However, localized heat coupled with high humidity is expected to persist along the Konkan belt in Maharashtra and the coastal state of Goa on October 22.
Clear Skies and Seasonal Temperatures in Delhi
The national capital is slated to maintain predominantly clear and tranquil weather conditions. Daytime skies across Delhi will remain unclouded, with maximum temperatures settling between 31°C and 33°C. Nighttime conditions will feel moderately cool, as minimum temperatures hover between 17°C and 19°C. Meteorological gauges indicate that both minimum and maximum temperature readings across the majority of Delhi localities will remain closely aligned with seasonal averages.
