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Higher precipitation likely: weatherman

Special Correspondent

VISAKHAPATNAM: The low pressure over the western Bay of Bengal off south coastal Andhra Pradesh for the last few days is now shifting towards north and more rain is likely under its influence. Many districts in the State are already experiencing heavy rain.

The well-marked low pressure area over the west central Bay of Bengal and adjoining north west Bay of Bengal off south Orissa and north coastal Andhra is likely to intensify into a depression, according to Director in-charge of the Cyclone Warning Centre M. Prasada Rao.

“Monsoon activity will be enhanced by a low pressure or a cyclonic circulation. During the south-west monsoon that is experienced between July and September, the conditions over the north Bay of Bengal (off the Orissa coast) are favourable for more rain due to the peninsular shape and other conditions. As the present low pressure, which is initially off the south coastal AP where the conditions are not favourable during this monsoon, is moving towards north, it is most likely to intensify into a depression,” he said while talking to The Hindu on Friday.

The conditions

Conditions that are favourable to a low pressure turning into a depression were sea’s surface temperature, trough region, low-level circulation, upper air divergence, etc. Conditions during northeast monsoon (October-December) off south Andhra coast were favourable, he said. The low pressure resulted in rain over many districts between June 1 and September 19. Rayalaseema districts received excess rainfall, ranging from 200 per cent in Anantapur (actual rainfall is 764 mm against normal rainfall of 254.5 mm) to 65 per cent in Chittoor (533.5 mm against 323.5 mm). It was 131 per cent excess in Kurnool (977.9 against 393 mm) and 87 per cent in Kadapa (620.8 against 331.2 mm).

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