Chennai may get heavy rain for 2 more days

Chennai city received 26% surplus rain from October 1 to November 7

After receiving a record rainfall in 24 hours till Sunday, Chennai will experience thunderstorms and heavy rain in the next 48 hours. Thunderstorms with lightning may occur in many other parts of Tamil Nadu, too, for two more days.

From October 1 to November 7, Chennai received 26% surplus rain and the State got 43% more than the usual amount, said S. Balachandran, Deputy Director-General of Meteorology, Regional Meteorological Centre. In this period, Chennai recorded 48 cm as against the normal 38 cm. Tamil Nadu got 33 cm as against 23 cm. “Chennai received very heavy rain in a very short span of time. Till 10 p.m. [Saturday], the city received only 3 cm of rain, but from 1 a.m. to 1.45 a.m., there was 6 cm and from 5 a.m. to 6 a.m., another 7 cm. This is called mesoscale phenomena, which are difficult to predict,” he said.

The sudden rain occurred because of a cyclonic circulation over the south-east Bay of Bengal and the adjoining equatorial Indian Ocean extending up to 4.5 km above the mean sea level. A low-pressure area may form over the south-east Bay of Bengal and surrounding areas by November 9, according to the India Meteorological Department (IMD). This could become more pronounced and move in the direction of north Tamil Nadu coast in the next 48 hours.