The India Meteorological Department (IMD) has officially announced the onset of the southwest monsoon, while the Regional Meteorological Centre (RMC) in Chennai has forecast heavy rainfall in several parts of Tamil Nadu over the coming days due to prevailing weather systems over the Bay of Bengal. After many areas in the state experienced summer showers on Saturday, providing relief from intense heat, the weather department issued a fresh advisory on Sunday warning of heavy rainfall in five districts.
Monsoon Onset and Weather Systems
The IMD had forecast the onset of the southwest monsoon within the next 24 hours on Friday. An IMD official stated, "After five days, the westerlies may arrive due to the onset of monsoon. Weather models show this may lead to a rise in temperature over north Tamil Nadu." According to the Chennai Meteorological Department, a low-pressure area persisting over the southwest Bay of Bengal is expected to influence weather conditions and continue rainfall activity for at least three more days.
Expected Rainfall and Affected Districts
Officials indicated that the weather system is likely to bring moderate to heavy rainfall in the interior and western regions of Tamil Nadu. The districts of Theni, Dindigul, Madurai, Coimbatore, and the Nilgiris are expected to receive heavy rainfall on Sunday and Monday. The department also warned that Karur, Tiruchy, and Sivaganga districts may experience heavy rainfall on Monday.
Authorities further cautioned that thunderstorms accompanied by lightning and gusty winds of up to 40 kmph are likely in isolated places during rainfall activity. Residents in the affected districts have been advised to remain cautious and follow weather updates issued by authorities.
Chennai Weather and Advisory for Fishermen
Chennai and its suburban areas are also likely to receive light rainfall during the day. Although widespread heavy rain is not expected in the city, cloudy skies and occasional showers may provide relief from rising temperatures. The weather department also warned fishermen against venturing into several sea regions due to rough weather conditions. Strong winds reaching up to 60 kmph are likely over the south Tamil Nadu coastal areas, the Gulf of Mannar, the Kanyakumari Sea region, the Andaman Sea, and parts of the south Bay of Bengal. Authorities urged fishermen and coastal residents to remain alert and strictly follow safety advisories until weather conditions improve.
