The Hindu Business Line : Depression weakens into ‘low’ over Sri Lanka

Thiruvananthapuram, Dec. 8 Bay of Bengal depression 07B has steadily weakened into a well-marked low-pressure area and further into a conventional ‘low’ over Sri Lanka and adjoining Comorin area on Monday.

India Meteorological Department (IMD) did not say whether the landfall of a 07B remnant took place over south Tamil Nadu coast as was forecast on Sunday. This region received only light to moderate rains overnight.

SHIFT IN FOCUS

The focus is now on the more potent remnant of 07B that steered itself south-southwest over Sri Lanka and is prowling the Gulf of Mannar and contiguous Indian Ocean since Sunday.

The US Navy’s Operational Global Atmospheric Prediction System (NOGAPS) has been consistently predicting this scenario and intensification of the system while tracking further west.

The Centre for Ocean-Land-Atmosphere Studies and the European Centre for Medium-Term Weather Forecasts too seemed to share this outlook.

Latest NOGAPS projections say that this system would get embedded into the larger trough of low pressure encompassing the larger Indian Ocean, the South China Sea and the equatorial-central and south Pacific.

RAIN COVER

Tropical convective forcing would supply moisture to the system as it toys with the peninsular tip and the adjoining coasts of south Tamil Nadu and Kerala.

The resulting rain cover is forecast to extend over extreme south peninsula from Tuesday, which may persist for the next couple of days as well.

These forecasts also saw a buzz building in the South China Sea and a possible tropical storm spinning up from it around the weekend.

The IMD update on Monday said the remnant 07B ‘low’ would cause fairly widespread rain or thundershowers with isolated heavy to very heavy falls over Tamil Nadu and Kerala during the next two days.

Forecast by the Chennai Met Centre said rain or thundershowers are likely to occur at many places over south Tamil Nadu and Nagapattinam; Tiruvarur, Thanjavur, Pudukottai and Cuddalore districts of north coastal Tamil Nadu, Puducherry and Kerala; and at a few places over rest Tamil Nadu and Lakshadweep.

Isolated heavy rain has been warned of over these places during the next 24 hours.

WET IN NORTH

Towards the north of the country, a western disturbance persisted over Jammu and Kashmir. It is likely to cause scattered to fairly widespread precipitation over western Himalayan region till Tuesday.

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