Chennai: A new low-pressure area has developed over the Bay of Bengal, according to the India Meteorological Department (IMD).
In its latest bulletin, the IMD reported that the system formed at 5:30 a.m. today over the Bay of Bengal and adjoining regions. It is likely to move in a west-northwest direction towards the northwestern Bay of Bengal within the next 24 hours.
Additionally, the IMD has forecast the formation of another fresh low-pressure system over the central-east and adjoining northern Bay of Bengal around September 25.
For Tamil Nadu and Puducherry, light to moderate rainfall is expected in isolated places over the next seven days. In Chennai, skies are likely to remain partly cloudy for the next two days. A few areas in the city may experience moderate rain accompanied by thunder and lightning, the IMD added.
https://internal.imd.gov.in/press_release/20250921_pr_4313.pdf
Subject: (i) A low pressure area is likely to form over north Bay of Bengal during next 24 hours.
(ii) Another low pressure area is likely to form over eastcentral & adjoining north Bay of Bengal
around 25th September. Moving west-northwestwards, it is very likely to become a depression over
northwest and adjoining westcentral Bay of Bengal off South Odisha- North Andhra Pradesh coasts
around 26th September. It is very likely to cross South Odisha-North Andhra Pradesh coasts around
27th September.
(iii) Isolated Heavy rainfall likely over Odisha during 23rd-27th; Jharkhand, Chhattisgarh, Vidarbha
during 24th -27th and Coastal Andhra Pradesh & Yanam on 21st and during 24th -27th September,
2025.
(iv) Isolated heavy rainfall likely to continue over Northeast India during next 3-4 days.
Realised weather during past 24 hours till 0830 hours IST of today, the 21st September, 2025:
❖ Very heavy rainfall (12-20 cm) has been recorded at isolated places over Gujarat Region and
Marathawada and Bihar.
❖ Heavy rainfall (7-11 cm) has been recorded at isolated places over East Rajasthan, West Madhya Pradesh,
Coastal Andhra Pradesh & Yanam, Gangetic West Bengal, Telangana, North Interior Karnataka, Konkan &
Goa, Odisha and Jharkhand.
