New weather system may develop by Nov 29

New weather system may develop by Nov 29

Likely To Bring Widespread Rain To South Tamil Nadu

TIMES NEWS NETWORK

Chennai:28.11.2020

After Cyclone Nivar brought heavy rain to the city and most parts of north Tamil Nadu, it could be time for south Tamil Nadu to get drenched, with two more systems brewing over the Bay of Bengal.

India Meteorological Department (IMD) has forecast that a low-pressure area is expected to form over southeast Bay of Bengal in the next 48 hours. By November 30, the system may intensify into a depression and is likely to strengthen and move westwards on December 2. “Under the influence of this system, there may be widespread rain in Tamil Nadu and Puducherry from December 1 to 3,” said S Balachandran, DDG, Regional Meteorological Centre, Chennai.

By December 1, the IMD said, there may be light to moderate rain in most places and isolated heavy to very heavy rain. There may be heavy to very heavy rain with isolated extremely heavy spells at a few places in Tamil Nadu, Puducherry and Karaikal on December 2 and 3.

For the next 24 hours, Chennai and its suburbs may receive light rain over some areas, while the sky would be generally cloudy with temperatures of a maximum 30 degrees C and a minimum 26 degrees C. A dry spell may prevail over the city in the subsequent 24 hours with temperatures hovering around a maximum of 31 degrees C and a minimum of 26 degrees C.

Private weather forecasters said the system may move towards the Arabian Sea passing across Comorin Area and the Gulf of Mannar. This movement may bring heavy spells across the rain-deficit southern districts of Tamil Nadu as well as parts of Kerala. “Regions like Pamban, Kanyakumari and south Kerala may receive rain. From the Arabian Sea, the system may move towards Somalia or Oman. As of now, it looks like the system may develop into a depression or at the most, a deep depression. We have to wait and see if it further intensifies,” said Mahesh Palawat, chief meteorologist, Skymet Weather.

The system may also bring rain to the northern districts of Tamil Nadu including Chennai by pulling the easterlies towards the land leading to convergence that could result in convective rainfall. “There will be widespread rainfall and entire Tamil Nadu may receive spells of varying intensity. The southern districts may get heavy rainfall, but it is not going to be severe enough for people to worry,” said Pradeep John, weather blogger.

Weathermen have also forecast that another system may form over the Bay by the second week of December and is likely to move towards Chennai-Puducherry coast. However, experts said it was too early to know how the system would evolve.

Meanwhile, Cyclone Nivar which dumped heavy rain over parts of Andhra Pradesh while losing its intensity weakened into a low pressure and by Friday evening lay over south coastal Andhra Pradesh and adjoining west central Bay of Bengal. “Rainfall intensity will reduce over Andhra Pradesh and the system may further weaken,” Palawat said.

The storm left excess rainfall over many districts of north Tamil Nadu including Chennai with 36%. Among its neighbouring districts, Tiruvallur got an excess of 2%, Kancheepuram 20%, Chengalpet 12%, Ranipet 14%, Tirupathur 46% and Villupuram 4% so far this season starting October 1. While Virudhunagar had an excess of 23%, the rest of the districts continue to be rain deficit. Tamil Nadu has a deficit of 15% so far this season.