A low pressure area is persisting over the southeast Arabian Sea and the Lakshadweep region off the Kerala-Karnataka coasts. It is expected to move west-northwestward and intensify into a depression over the next 24 hours.
Consequently, isolated heavy to very heavy rainfall is expected over Kerala, Lakshadweep, Tamil Nadu, Puducherry, Andhra Pradesh, coastal and south interior Karnataka during the next seven days.
Talking about East, Northeast and Central India, light to moderate rain with heavy rain is likely at many places in Andaman and Nicobar Islands during 19-23 October, Mizoram on 23 October. Thunderstorm accompanied with lightning and gusty winds is likely over Odisha during 19-21 October, Andaman and Nicobar during 19-25 October. Lightning is likely over Madhya Pradesh, Vidarbha during 21-23 October, Chhattisgarh during 20-24 October, Nagaland, Manipur, Mizoram and Tripura during 19-23 October.
Talking about Western India, there is a possibility of thunderstorms with lightning in Konkan, Goa, Marathwada, Central Maharashtra during the next three days.
Meanwhile, a low pressure area is likely to form over the southeast Bay of Bengal around October 21. The department has predicted heavy rains in the ghat areas of Tamil Nadu and Kerala’s Coimbatore, Nilgiris, Erode, Tiruppur, Theni, and Tenkasi districts for the next 24 hours. For Chennai and its neighboring districts, the weather department has predicted one or two spells of light to moderate rain with thunder and lightning in some areas. Tamil Nadu has been receiving heavy rains for the past two to three days since the arrival of the northeast monsoon on October 16.
Meanwhile, on the amount of rainfall recorded in Tamil Nadu, the weather office said, Kothagiri district in the Nilgiris received the maximum rainfall of 14 cm in the last 24 hours, while Sirkali in Mayiladuthurai district recorded the lowest rainfall of 1 cm. The weather department said in its bulletin on Sunday that an upper air cyclonic circulation is persisting over the south Andaman Sea and adjoining southeast Bay of Bengal, extending up to 1.5 km above sea level. “Under its influence, a low pressure area is likely to form over the southeast Bay of Bengal around October 21, 2025. It is likely to move northwestwards and concentrate as a depression over the central Bay of Bengal during the next 48 hours,” the bulletin said.
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