A depression is likely to form today off the well-marked low pressure in the South Andaman Sea and the adjoining south-eastern Bay of Bengal, with a low roosting there for the past two days, sources in the Met Office said yesterday. This would be the second cyclone forming in the south-eastern Bay since the last one in November, which rang alarm bells in India’s Tamil Nadu coast but petered out in the Bay before causing any damage. Codenamed ‘Nada’, it disappeared because of its hasty birth off a low within 24 hours.
Similarly, the well-marked low was born off a low only two days ago. But it has not yet gathered steam despite its formation in the South Andaman sea, the place where Bay cyclones usually develop from lows.
From lows to well-marked lows to depressions to deep depression to a cyclone: this is the birth cycle of cyclones.
While the south-eastern Bay is witnessing the possible formation of another cyclone, the extended trough of the low to the north-east has been causing turmoil in the upper atmosphere, pumping in plenty of moisture into the air, which has churned out thick to dense fog in the early hours and brought down the temperature.