Many parts of Chennai received intense spells on Tuesday afternoon taking residents by surprise. Weathermen have forecast more spells for the next two days.
N Puviarasan, director, Area Cyclone Warning Centre, IMD said wind convergence, the meeting of sea and land breezes, which results in convective activity bringing rainfall, occurs mostly away from the coast.
“Usually the convergence happens some 20km or 30km from the coast, bringing rainfall to the interiors, only sometimes moving towards city core areas. This is why the recent rainfall has been more in the interior areas,” he said.
Many parts of the city and its suburbs, including Chitlapakkam, Chembarambakkam and Kolapakkam, received a good amount of rain, accompanied by thunder and lightning. Several places, including the Selaiyur stretch of Tambaram-Velachery Main Road, and the Mogappair stretch of the Maduravoyal Bypass Road were waterlogged as rain continued for over an hour.
Residents of various areas, including Kolathur, Chitlapakkam and Mogappair, said power supply was interrupted for nearly an hour following thunder and short but intense spells of rain.
A cyclonic circulation lying over southeast and adjoining southwest Bay of Bengal also influenced the wind convergence on Tuesday evening, which saw rainfall across many areas at the same time, one of the few instances this season.
According to IMD forecast, sky condition is likely to be partly cloudy. Light rain is likely to occur over some areas. Maximum and minimum temperature likely to be around 36 and 27 degrees Celsius for the next 48 hours in the city.
A bulletin issued by the Regional Meteorological Centre said rains are likely to occur over isolated areas like Perambalur, Ariyalur, Salem, Pudukkottai, Dharmapuri, Nagapattinam and Krishnagiri districts.