A low pressure area is likely to develop over central parts of south Bay of Bengal on Thursday and it is expected to intensify into a cyclonic storm by Sunday or Monday, according to meteorology department officials.
The system that may move northwestwards towards the Tamil Nadu coast and bring rainfall around Sunday and Monday in the State, they said.
S. Balachandran, Deputy Director General of Meteorology, Regional Meteorological Centre, Chennai, said the system may either cross along the coast, parallel to the coast or away from the coast. The possibility of rainfall depended on how close the system would be from the coast and the location of the crossing point. “We would have more clarity on the cyclone and its track by Thursday,” he added.
Cyclones in April
While it is not usual for cyclones to form in April, Mr. Balachandran recalled that the State had witnessed cyclones in April 1962 and April 1966. Both systems crossed near Cuddalore.
The department has said there was a probability of rainfall in up to 75% of the weather stations across the State on Sunday and its continuation on Monday.
Rains due to convective activity is expected to lash one or two places in interior parts of Tamil Nadu till Saturday. On Wednesday too, Valparai recorded a rainfall of 4 cm, followed by Kodaikanal and Udhagamandalam till 5.30 p.m. However, the scale of thunderstorm activity would decrease from Thursday, officials said.
The Met department has forecast that the maximum temperature over Chennai will be around 36 degrees Celsius till Friday.