Heavy rainfall in these states due to cyclonic circulations,

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IMD updates: As per the latest analysis, under the influence of this cyclonic circulation, a low-pressure area is likely to form over East-central Bay of Bengal and adjoing north Andaman sea around 13 October
The India Meteorological Department (IMD) said that the cyclonic circulation over north Andaman Sea and neighbourhood extending upto 3.1 km above mean sea level persists. As per the latest analysis, under the influence of this cyclonic circulation, a low-pressure area is likely to form over East-central Bay of Bengal and adjoing north Andaman sea around 13th October. It is likely to move west-northwestwards and reach south Odisha-north Andhra Pradesh coasts as a well marked low-pressure area around 15 October.
Under its influence; Light to moderate rainfall at most places with isolated thunderstorm (wind speed 40-50 kmph gusting to 60 kmph) and heavy to very heavy falls very likely over Andaman & Nicobar Islands during next 4 days.