A low pressure area over southwest Bay of Bengal will bring rainfall to districts along north TN
The city, starved of rains for the past fortnight, will receive showers for the next two or three days.
A well-marked low pressure area that prevails over southwest Bay of Bengal and adjoining west-central bay will bring rainfall to districts along north Tamil Nadu coast and south Andhra Pradesh coast, according to the meteorological department.
Residents are eagerly awaiting a spell of rain as there have not been many showers after Cyclone Nilam. Even that system had brought in more winds than rain to Chennai. Residents say the water levels in their wells have dipped slightly from the lack of rains.
November is the wettest month of the year as the city on an average receives nearly 40 cm of rainfall spread over 11 days. However, this year the weather observatories in Nungambakkam and Meenambakkam have registered only 5 cm each so far, since November 1. Chennai needs 51 cm more to reach its annual rainfall of 140 cm.
Officials of the meteorological department said that the cloud patch over the coast of Andhra Pradesh is moving towards the Tamil Nadu coast. “We expect the rains to begin from Wednesday night and continue for two or three days. This will eventually spread to interior parts of Tamil Nadu,” said an official. While those districts, including Chennai, will get isolated heavy rainfall in the next two days, interior areas would have scattered rainfall.
Cloudy skies and wind kept Wednesday relatively cool despite the day temperature rising two degrees above the normal 30 degree Celsius. The system has influenced the change in wind direction, from dry northerly to north-easterly that has brought in moisture in the air. The minimum temperature that dipped to 19 degree Celsius last week increased to 26 degree Celsius on Wednesday.
Officials said that there may not be widespread heavy rainfall during this spell. However, rains may increase over the city and its fringes after November 25. “We still have one more month for the northeast monsoon to withdraw. In some years, we have received rains even as late as the first week of January,” said an official.
The department has forecast that strong surface winds with a speed reaching up to 45-55 kmph will blow along and off Tamil Nadu and Puducherry coast on Thursday.