Deep Depression over southwest and adjoining southeast Bay of Bengal

According to the Cyclone Warning Division  of the India Meteorological  Department (IMD):

Yesterday’s depression over southeast Bay of Bengal moved westwards, intensified into a deep depression over southwest and adjoining southeast Bay of Bengal in the early morning (0530 hrs IST) of today, the 1^st December, 2020. At 0830 hrs IST of today, it lay over the same region about 500 km east-southeast of Trincomalee (Sri Lanka) and 900 km east-southeast of Kanniyakumari (India).

It is very likely to intensify further into a cyclonic storm during next 24 hours. It is very likely to move west-northwestwards and cross Sri Lanka coast between latitude 7.5⁰N and 9.0⁰N close to Trincomalee during evening/night of 2^nd December. It is very likely to move nearly westwards thereafter, emerge into Gulf of Mannar and adjoining Comorin area on 3^rd December morning and move westward towards south Tamilnadu coast.

Forecast track and intensity are given below:

 

Warnings:

(i) Rainfall

• Heavy to very heavy rainfall at a few places with isolated Extremely heavy falls very likely over south Tamilnadu (Kanniyakumari, Tirunelveli, Thoothukudi, Tenkasi, Ramanathapuram and Sivagangai) on 2^nd and 3^rd December, 2020; over south Kerala(Thiruvananthapuram, Kollam, Pathanamthitta and Alappuzah) on 3^rd  December and isolated heavy to very heavy rainfall likely over south Tamilnadu on 2^nd & 4^th December 2020 and south Kerala on 3^rd & 4^th December, 2020.
• Heavy to very heavy rainfall at Isolated places very likely over north Tamilnadu, Puducherry, Mahe  & Kariakal and north Kerala during 2^nd & 3^rd  December, isolated heavy rainfall on 4^th December and isolated heavy rainfall over coastal Tamilnadu on 1^st December.
• Heavy rainfall at isolated places very likely over south Coastal Andhra Pradesh during 2^nd & 03^rd December and over Lakshadweep during 03^rd and 4^th December, 2020.

 

Sub-Divisions	01 Dec 2020*	02 Dec 2020*	03 Dec 2020*	04 Dec 2020*
South Tamilnadu	Rainfall at many places with heavy  rainfall at  isolated places	Rainfall at most places with heavy to very heavy rainfall at  few places and extremely heavy fall at  isolated places	Rainfall at most places with heavy to very heavy rainfall at  few places and extremely heavy fall at  isolated places	Rainfall at many places with heavy to very heavy  rainfall at  isolated places
North Tamilnadu, Puducherry & Karaikal	Rainfall at a few places with heavy rainfall at  isolated places	Rainfall at many places with heavy to very heavy  rainfall at  isolated places	Rainfall at many places with heavy to very heavy  rainfall at  isolated places	Rainfall at many places with heavy fall at  isolated places
South Kerala	Rainfall at many places with heavy  rainfall at  isolated places	Rainfall at most places with heavy to very heavy rainfall at  isolated places	Rainfall at most places with heavy to very heavy rainfall at  few places and extremely heavy fall at  isolated places	Rainfall at many places with heavy to very heavy  rainfall at  isolated places
North Kerala & Mahe	Rainfall at many places with  heavy rainfall at  isolated places	Rainfall at many places with heavy to very heavy  rainfall at  isolated places	Rainfall at most places with heavy to very heavy  rainfall  at  isolated places	Rainfall at a few places with heavy fall at  isolated places
South Coastal Andhra Pradesh	Rainfall  at isolated places	Rainfall  at a few places with heavy rainfall at isolated places	Rainfall  at a few places with heavy rainfall at isolated places	Rainfall  at a few places
Lakshadweep	Rainfall  at a few places	Rainfall  at most places	Rainfall  at most places with heavy to very falls at isolated places	Rainfall  at most places with heavy to very falls at isolated places

 

(ii) Wind warning

• Squally wind speed reaching 50-60 kmph gusting to 70 kmph very likely over central parts of South Bay of Bengal during next 12 hours.
• It would gradually increase becoming gale wind speed reaching 60-70 kmph gusting to 80 kmph over southwest and adjoining southeast Bay of Bengal from 1^st December evening. It would gradually increase becoming 70-80 kmph gusting to 90 kmph over southwest Bay of Bengal, along & off Sri Lanka coast from 2^nd December morning for subsequent 24 hours.
• Squally wind speed reaching 45-55 kmph gusting to 65 kmph very likely over Comorin Area, Gulf of Mannar and south Tamilnadu-Kerala coasts from 2^nd December forenoon. It will gradually increase becoming 55-65 kmph gusting to 75 kmph over Gulf of Mannar, along & off south Tamilnadu & Kerala coasts, over Comorin Area, Lakshadweep-Maldives area and adjoining southeast Arabian Sea from 3^rd December morning and 70-80 kmph gusting to 90 kmph from evening of 3^rd December for subsequent 24 hours.

(iii) Sea condition

• Prevailing rough to very rough sea condition over southeast Bay of Bengal will continue during 1^st December and very rough to high over southeast & adjoining southwest Bay of Bengal and along & off east Sri Lanka coast during 1^st & 2^nd December, and rough to very rough over Comorin Area, Gulf of Mannar & along & off south Tamilnadu-Kerala coasts from 2^nd to 4^th December.

· Sea condition will be rough to very rough over Lakshadweep-Maldives area and adjoining southeast Arabian Sea during 3^rd – 4^th December.

 

(iv) Fishermen Warning

• Total suspension of fishing operation during 1^st december to 4^th December over the areas as mentioned below.
• Fishermen are advised not to venture into southeast Bay of Bengal during 1^st December, southwest Bay of Bengal and along & off east Sri Lanka coast  from 1^st to 3^rd December; Comorin Area, Gulf of Mannar and south Tamilnadu-Kerala coasts from 2^nd to 4^th December,  over Lakshadweep-Maldives area & adjoining southeast Arabian Sea from 3^rd to 4^th December.   
• Fishermen out at Sea are advised to return to the coast by today.

 

The system is under continuous surveillance and the concerned state governments are being informed regularly.

 

For details kindly visit www.rsmcnewdelhi.imd.gov.in, www.mausam.imd.gov.in

 

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