According to the National Weather Forecasting Centre of the India Meteorological Department (IMD):

Significant Weather Features

♦ A Well Marked Low Pressure Area lies over Southeast Bay of Bengal & adjoining areas of South Andaman Sea and Equatorial Indian Ocean with associated cyclonic circulation extending upto mid tropospheric levels. It is very likely to concentrate into a Depression during next 36 hours and likely to intensify further thereafter. It is likely to move westnorthwestwards and reach near south Tamil Nadu coast around 02nd December, 2020.

♦ Under the influence of the above system;

1. Scattered to Widespread rainfall activity very likely over Tamilnadu, Puducherry & Karaikal, Kerala & Mahe, Lakshadweep, south coastal Andhra Pradesh and south Rayalaseema during 01st-03rd December, 2020.
2. ii) Isolated heavy to very heavy rainfall with moderate thunderstorm & lightning very likely over Tamil Nadu, Puducherry & Karaikal during 01st-03rd December and isolated extremely rainfall likely over south Tamilnadu and south Kerala on 02nd December 2020. Isolated heavy falls with moderate thunderstorm & lightning also very likely over south Coastal Andhra Pradesh, Rayalseema and Lakshadweep area during 02nd-03rd December, 2020.

• Fishermen are advised not to venture into Southeast Bay of Bengal & adjoining South Andaman Sea on 29th November; over central parts of South Bay of Bengal on 30th November; over Southwest Bay of Bengal, Gulf of Mannar, Comorin area, along & off Tamilnadu-Kerala coasts on 01st & 02nd December and over Lakshadweep-Maldives areas and Southeast Arabian Sea on 02nd & 03rd December, 2020.

Meteorological Analysis (Based on 0830 hours IST)

♦ The Low Pressure Area over South Andaman Sea and adjoining areas of Southeast Bay of Bengal & Equatorial IndianOcean now seen as a Well Marked Low Pressure Area over Southeast Bay of Bengal & adjoining areas of South AndamanSea andEquatorial Indian Ocean with associated cyclonic circulation extending upto mid tropospheric levels. It is very likely toconcentrate into a Depression during next 36 hours and likely to intensify further thereafter. It is likely to move westnorthwestwardsand reach near south Tamil Nadu coast around 02nd December, 2020.

♦ The Western Disturbance as a trough in mid tropospheric westerlies persists.

♦ A Cyclonic Circulation lies over Haryana & adjoining West Uttar Pradesh.

♦ A Cyclonic Circulation lies over Eastcentral Arabian Sea off Maharashtra coast.

♦ The Cyclonic Circulation over Northeast Bangladesh & neighbourhood hasbecome less marked.

♦ The cyclonic circulation over Sub-Himalayan West Bengal & Sikkim at 3.1 km above mean sea level has become less marked.