Tamil Nadu heavy rain is likely in Kanyakumari, parts of Tirunelveli and Thanjavur, while Puducherry and Karaikal may receive moderate thunderstorms, according to a report issued by the Chennai weather centre on October 13.
The forecast comes as conditions begin to support the withdrawal of the southwest monsoon from the remaining parts of the country and the onset of the northeast monsoon over southern states. The weather centre said a circulation was present over the southwest Bay of Bengal beyond the coastal areas of southern Sri Lanka, extending up to about 3.1 kilometres in altitude.
The system is expected to bring different levels of rainfall across the region. Kanyakumari may receive heavy rain accompanied by thunder and lightning. The report also identified the hill areas of Tirunelveli district and parts of Thanjavur district as locations where heavy rain could occur with thunder, lightning and strong winds.
Winds in the affected areas may reach speeds of 40 to 50 kilometres per hour, according to the forecast. Such conditions can create short-term hazards on exposed roads and near construction activity, particularly where visibility is reduced by heavy rain or where loose materials have not been secured. The forecast itself does not specify rainfall totals or identify individual urban locations within the districts.
Karaikal is likely to receive moderate rain with thunder and lightning. Puducherry and Karaikal may also experience moderate thunderstorms. Light rain is possible in the remaining districts of Tamil Nadu, the weather centre said.
The forecast is significant for the state’s transition between the two monsoon phases. The northeast monsoon is an important source of rainfall for Tamil Nadu and the adjoining southern region. Its arrival can bring sudden changes in rainfall intensity, including short-duration spells that place pressure on local storm-water systems, roads and public transport operations. The supplied report does not state that flooding or disruption has occurred, and no specific municipal response was cited.
For residents in the named districts, the immediate weather risks highlighted in the report are heavy rain, lightning and strong winds. People travelling through hilly areas of Tirunelveli and locations in Kanyakumari and Thanjavur may need to follow updates issued by the weather authorities and local administrations. The report does not provide a district-wise timing schedule beyond its reference to rainfall over the coming period.
The Chennai weather centre’s bulletin indicates that the most intense conditions are expected in the districts and areas specifically named in its forecast, while lighter rain may occur elsewhere in Tamil Nadu. Further local advisories, including details on rainfall intensity, warnings and any public-safety measures, will determine the operational impact in individual towns and cities.
