In a remarkable meteorological event, the southern districts of Tamil Nadu, specifically Thoothukudi (Tuticorin) and Thirunelveli, have experienced unprecedented rainfall, setting new records within a span of 24 hours. This intense rainfall comes as the northeast monsoon gains momentum over the region, marking its active phase since the latter part of the previous week.
The India Meteorological Department (IMD) highlighted the severity of the downpour, with certain areas registering an astounding 950mm of rainfall in just a day. The affected districts, located along Tamil Nadu’s southeast coast, have witnessed a deluge, signaling the heightened activity of the northeast monsoon in the region.
An official from the IMD commented on the prevailing weather conditions, stating, “The northeast monsoon remains robust over southern Tamil Nadu and Kerala. The forecast indicates that the regions will continue to experience extremely heavy to exceptionally heavy rainfall, exceeding 200mm within 24 hours, until Tuesday. Subsequently, there is an anticipated reduction in rainfall intensity.”
The meteorological department has issued a red alert, signifying a warning, for the southern districts of Tamil Nadu, attributing the intensified rainfall to a cyclonic circulation observed over the Comorin area. Additionally, satellite imagery has revealed extensive cloud cover over southern Kerala and Tamil Nadu, further substantiating the issuance of the alert.
Recent data indicates that Thirunelveli district has recorded a significant rainfall accumulation of 760mm, marking a 61% surplus compared to the seasonal average. In contrast, Thoothukudi has observed a normal rainfall of 349mm since the onset of October. As of December 17, the cumulative rainfall for the northeast monsoon season in the state has reached 396mm, aligning with the expected values for this period. Earlier in December, northern parts of Tamil Nadu experienced substantial rainfall due to the influence of cyclone Michaung.
In tandem with Tamil Nadu, Kerala has also witnessed substantial precipitation, with notable rainfall recorded in districts such as Idukki and Thiruvananthapuram. Specific regions in Kerala, including Pampadumpara, Vattavada, Kovilkadavu, Myladumpara, and Thattathumala, reported considerable rainfall, contributing to the overall wet spell in the state.
The northeast monsoon, prevalent from October to December, is crucial for the southern regions of India, accounting for nearly 48% of Tamil Nadu’s annual rainfall during these months. The recent rainfall activity underscores the significance of the monsoon season, emphasizing the need for vigilant monitoring and preparedness to mitigate potential impacts.
