Weathermen have forecast more thunderstorms in the city till Monday and possibly till mid next week if the system brewing over Bay of Bengal moves towards Andhra Pradesh coast. Weather enthusiasts said while a favourable wind pattern could persist at least for the next four days that could bring rain to the city and the neighbouring districts, there seem to be no indication for the entry of easterlies, one of the first signs for the onset of northeast monsoon, till October 26.
IMD officials said an atmospheric circulation extending over Tamil Nadu is making it conducive for opposing winds to converge and result in convective activity. The agency has forecast that a low-pressure area is likely to form over east-central Bay of Bengal and adjoining Andaman Sea on October 19 and will become more marked during subsequent 24 hours.
“As of now, the city is likely to receive rainfall till October 19. After that, it depends on the movement of the system. If it intensifies into a depression, it could recurve and move towards Odisha coast, which means we may not receive rainfall. If it does not intensify, it may move to Andhra Pradesh coast and could bring rainfall to parts of north Tamil Nadu,” said N Puviarasan, director, Area Cyclone Warning Centre, IMD.
The rain that lasted from Friday night till early Saturday morning brought 32.5mm to Nungambakkam and 4.5mm in Meenambakkam. Perambur received the highest at 61mm, Manali New Town 55mm, Puzhal 54mm, Sathyabama University 53mm while core localities like Ice House recorded 13mm and Teynampet 10mm.
While pre-monsoon showers could bring some cheer to the city, which is seeing a delay in the onset of northeast monsoon, experts said at present the westerlies are strong over the region, as southwest monsoon is still active over Central and Eastern region of India, and that easterlies may not set in before October 26.