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Hans India
3 days ago
- Climate
- Hans India
TN sees fewer heatwave days, higher rainfall this summer: Regional MeT Centre
Chennai: Tamil Nadu is witnessing a notably different summer this year, with fewer heatwave days and significantly higher rainfall compared to the usual seasonal trends, according to the Regional Meteorological Centre (RMC) in Chennai. B. Amudha, Head of RMC Chennai, stated that the number of heatwave days -- defined as days when temperatures exceed 41 degrees Celsius -- has declined across the state compared to the past five years. At the same time, the state has received far more rainfall than usual during the ongoing monsoon season. As per RMC data, Vellore reported the highest number of heatwave days this summer, with temperatures exceeding 40 degrees Celsius on 16 days. Karur Paramathi followed closely, recording high temperatures on 10 days. Erode registered the highest temperature of the season -- 41.2 degrees Celsius -- on May 15. In contrast, other districts such as Vellore and Madurai recorded maximum temperatures of 40 degrees only on one or two days. In Chennai, the mercury touched 40 degrees just once throughout the summer. However, rainfall in Chennai has been remarkably high. The city received 129 per cent more rainfall than the average, recording 12 cm of rain this summer. Across Tamil Nadu, the state recorded 25 cm of rainfall against the normal 13 cm -- an increase of 97 per cent compared to seasonal norms. Amudha added that the long-period average (LPA) -- a climatological benchmark measuring average rainfall over a specific time period -- is also expected to rise this year. The LPA for Tamil Nadu may reach up to 110 per cent, while the national average is expected to be around 106 per cent, according to the forecast by the India Meteorological Department (IMD). Despite the promising rainfall trend, the RMC has cautioned that some northern interior districts may experience a dip in rainfall during June. In other regions, rainfall is expected to be normal or above normal. Chennai, meanwhile, can expect light to moderate showers over the next few days, added Amudha. The shift in weather patterns highlights the dynamic nature of climate conditions and the importance of continuous monitoring and forecasting to ensure preparedness and resource management across the state.
The Hindu
3 days ago
- Climate
- The Hindu
After a soaking May, IMD predicts slowdown in rain activity for a week
After recording a 97% surplus in summer rainfall, Tamil Nadu is now expected to see a slowdown in rain activity for a week, particularly in the Western Ghats region. The Regional Meteorological Centre (RMC), Chennai, has forecast that there will be a drop in rainfall activity across the State till June 6. It will be restricted to isolated places after an eventful May, marked by exceptional rainfall and a dip in daytime temperatures. With no significant weather system over the Bay of Bengal, Chennai too may begin to experience a mild increase in maximum temperature from Sunday, officials said. In its long-range forecast for Southwest monsoon, India Meteorological Department (IMD) has forecast that most parts of the State will continue to experience normal or above normal rainfall in June. However, north interior Tamil Nadu is likely to receive only below average rainfall in June. Noting that the IMD has provided subdivision-wise monsoon forecast maps for the first time, B. Amudha, Head (Additional in-charge), RMC, Chennai, said there was a probability for surplus rainfall in Tamil Nadu and Puducherry during the monsoon. The weather models have predicted that the region may receive 36 cm, against its seasonal average of 33 cm, she said. The early onset of monsoon has brought in torrential downpour in the Western Ghats region., with places such as Avalanche (the Nilgiris district) and Chinnakallar (Coimbatore district) receiving 141 cm and 101 cm of rainfall spread over eight days since May 23, she added. Summer was relatively mild in many parts of the State this year, with only eight of 30 weather stations seeing temperatures above 40 degrees Celsius. Erode recorded the season's highest day temperature of 41.2 degrees Celsius on May 15. Vellore recorded 16 hot days this summer, Ms. Amudha said. Meteorologists said Chennai experienced one of its mildest summers this year, with a cooler May and excess summer rainfall. P. Senthamarai Kannan, Director, Area Cyclone Warning Centre, RMC, Chennai, said the city did not record temperatures above 40 degrees Celsius this summer. In the past 45 years, this is the eighth year that Chennai has had a mild summer with no hot days. Some of the previous years when the city experienced subdued heat include 2022, 2018, 1995 and 1987. Chennai did not witness a spike in temperatures due to back-to-back rainfall episodes during peak summer days and early onset of the Southwest Monsoon. This year, maximum temperatures stayed below normal during 39% of the days in May, said Mr. Kannan.
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India.com
25-05-2025
- Climate
- India.com
Heavy Rain Alert For Tamil Nadu Districts Till May 28: RMC Issues Red Warning For Nilgiris
With the southwest monsoon's early onset over Kerala and advancement to several parts of Tamil Nadu, the Regional Meteorological Centre (RMC) has forecast heavy to very heavy rainfall across multiple districts of the state till May 28. According to RMC officials, several regions, including the Nilgiris, Coimbatore (ghat areas), Theni, Tirunelveli, Tenkasi, Dindigul, Kanniyakumari, and Tiruppur, are expected to witness intense rainfall accompanied by thunderstorms, lightning, and gusty winds ranging from 40 to 50 kmph between May 25 and May 28. RMC Director B. Amudha noted that a low-pressure area is likely to form over the west-central and adjoining north Bay of Bengal around May 27. This development could further enhance rainfall activity over the southern peninsula in the coming days. The Nilgiris and the ghat areas of Coimbatore have already recorded significant rainfall in the past 24 hours. Avalanche and Pandalur in the Nilgiris district received 11 cm of rain each, while Chinnakalar in Coimbatore recorded 9 cm. The Meteorological Department has issued a Red Alert for the Nilgiris district, warning of the possibility of isolated extremely heavy rainfall on May 25 and 26. Chennai is expected to experience moderate rain and thunderstorms during the same period. Daytime temperatures in the city are likely to hover between 35 degrees Celsius and 37 degrees Celsius. Authorities have advised residents in hilly and low-lying areas to stay vigilant and follow safety instructions issued by local administrations. The risk of landslides, flash floods, and waterlogging is particularly high in vulnerable districts, especially in the Western Ghats region. Disaster management teams are on standby, and officials are preparing for potential disruptions to travel, transport, and public utilities. With the monsoon system expected to remain active, further forecasts regarding rainfall in June will be issued by the RMC after the formation of the anticipated low-pressure system in the Bay of Bengal.
Hans India
25-05-2025
- Climate
- Hans India
Heavy rain forecast for several TN districts till May 28
With the southwest monsoon's early onset over Kerala and advancement to several parts of Tamil Nadu, the Regional Meteorological Centre (RMC) has forecast heavy to very heavy rainfall across multiple districts of the state till May 28. According to RMC officials, several regions, including the Nilgiris, Coimbatore (ghat areas), Theni, Tirunelveli, Tenkasi, Dindigul, Kanniyakumari, and Tiruppur, are expected to witness intense rainfall accompanied by thunderstorms, lightning, and gusty winds ranging from 40 to 50 kmph between May 25 and May 28. RMC Director B. Amudha noted that a low-pressure area is likely to form over the west-central and adjoining north Bay of Bengal around May 27. This development could further enhance rainfall activity over the southern peninsula in the coming days. The Nilgiris and the ghat areas of Coimbatore have already recorded significant rainfall in the past 24 hours. Avalanche and Pandalur in the Nilgiris district received 11 cm of rain each, while Chinnakalar in Coimbatore recorded 9 cm. The Meteorological Department has issued a Red Alert for the Nilgiris district, warning of the possibility of isolated extremely heavy rainfall on May 25 and 26. Chennai is expected to experience moderate rain and thunderstorms during the same period. Daytime temperatures in the city are likely to hover between 35 degrees Celsius and 37 degrees Celsius. Authorities have advised residents in hilly and low-lying areas to stay vigilant and follow safety instructions issued by local administrations. The risk of landslides, flash floods, and waterlogging is particularly high in vulnerable districts, especially in the Western Ghats region. Disaster management teams are on standby, and officials are preparing for potential disruptions to travel, transport, and public utilities. With the monsoon system expected to remain active, further forecasts regarding rainfall in June will be issued by the RMC after the formation of the anticipated low-pressure system in the Bay of Bengal.
The Hindu
20-05-2025
- Climate
- The Hindu
Conditions favourable for advance of southwest monsoon: RMC
The Regional Meteorological Centre (RMC) here on Tuesday said that the meteorological conditions are likely to become favourable for the onset of the southwest Monsoon over Kerala during the next 4-5 days. The conditions are also likely to become favourable for advance of the monsoon over some parts of Tamil Nadu during the same period. B. Amudha, head (Additional in-charge), RMC, said that an upper air cyclonic circulation is likely to form over East central Arabian Sea off Karnataka coast around Wednesday. Under its influence, a low-pressure area is likely to form over the same region around Thursday. Thereafter, it is likely to move northwards and intensify further. On how the onset and advance of the monsoon is declared, she explained that if after May 10, 60% of the 14 stations including Minicoy, Amini, Thiruvananthapuram, Kollam, Alapuzha, Punalur, Kottayam, Kochi, Thrissur, Kozhikoda, Thalassery, Kannur, Kudulu and Mangalore report rainfall of 2.5 mm or more for two consecutive days, the onset over Kerala can be declared on the second day, provided other criteria including speed of the westerly winds are also met. The monsoon normally sets in over Kerala around June 1 and advances northwards, usually in surges and covers the entire country around July 15. Meanwhile on Tuesday, rainfall occurred at a few places over northern Tamil Nadu and at many places over southern parts of the State. Dry weather prevailed over Puducherry and Karaikal area. From 8.30 a.m. on Tuesday till 5.30 p.m, several stations recorded rain. Tiruttani received 56 mm of rain, Tiruttani ISRO station 55.5 mm, in Tiruvallur 43 mm, Salem 21 mm, Chembarambakkam 20.5 mm, Dharmapuri 19 mm, Kalavai in Ranipet district 18.5 mm, Mamallapuram 13.5 mm, Virinjipuram KVK in Vellore district 10.5 mm, Tiruvannamalai 7.5 mm, Poonamallee 5 mm, Hindustan University 4.5 mm, VIT Chennai campus 4 mm, Yercaud 3.5 mm, Coonoor 3 mm, Meenambakkam and Nungambakkam stations in Chennai recorded traces of rain. The upper air cyclonic circulation over west-central Bay of Bengal and adjoining southwest Bay of Bengal now lies over west-central Bay of Bengal adjoining south Andhra Pradesh and north Tamil Nadu and extends up to 1.5 km above mean sea level tilting south-west wards. Light to moderate rain is likely to occur over isolated places in Tamil Nadu, Puducherry and Karaikal area till May 26. It may be accompanied with thunder and lightning in one or two areas. There will be a gradual rise in maximum temperature by 2-3 degree Celsius at a few pockets till Saturday over Tamil Nadu, Puducherry and Karaikal area.
