According to the Cyclone Warning Division  of the India Meteorology Department, Delh:  (at 1600Hrs IST; 04.00 PM)    

The Depression over southwest and adjoining southeast Bay of Bengal moved west-northwestwards with a speed of 11 kmph during past 06 hours and  lay centred at  about 520 km east-southeast of Puducherry and 560 km southeast of Chennai. It is very likely to intensify into a cyclonic storm during next 24 hours. It is very likely to move northwestwards and cross Tamil Nadu and Puducherry coasts between Karaikal and Mamallapuram around 25^th November 2020 afternoon as a severe cyclonic storm with a wind speed of 100-110 kmph gusting to 120 kmph.

Forecast track and intensity are given below:

Date/Time(IST)

Maximum sustained surface 

wind speed (Kmph)

Category of cyclonic disturbance

9.6/84.0

10.1/82.8

10.5/81.9

70-80 gusting to 90

25.11.20/2330

Warnings:

 (i)    Heavy Rainfall Warning

Fairly widespread to widespread rainfall/thunderstorm activity very likely over Tamilnadu, Puducherry & Karaikal during 24^th to 26^th November and over south Coastal Andhra Pradesh, Rayalaseema during 25^th to 26^th and Telangana during 26^th to 27^th November, 2020. Isolated extremely heavy rainfall activity also very likely over Tamilnadu & Puducherry (Pudukottai, Thanjavur, Tiruvarur, Karaikal, Nagapattinam, Cuddalore, Ariyalur & Perabalu districts during 24^th and Kadalur, Kallakurchi, Puducherry, Villupuram, Tiruvannamalai, Chengalpattu to Ariyalur, Perambalur and Karaikal districts during 25^th) and over south Coastal Andhra Pradesh & Rayalaseema (Nellore and Chittoor districts) on 25^th & 26^th and over Telangana on 26^th November, 2020.

(ii) Wind warning

Squally weather with wind speed of 45-55 kmph gusting to 65 kmph likely over Southwest & adjoining west-central & southeast Bay of Bengal and along & off Tamil Nadu and south Andhra Pradesh coasts on 23^rd November. It would increase gradually becoming 65-75 kmph gusting to 85 kmph over the southwest and adjoining westcentral Bay of Bengal  and 55-65 kmph gusting to 75 kmph along and off Tamil Nadu and adjoining  South Andhra Pradesh coast and over Gulf of Mannar from 24^th November morning. It would further increase becoming 100-110 kmph gusting to 120 kmph over the southwest Bay of Bengal  along and off coastal districts of north Tamil Nadu and Puducherry (Nagapattinam, Karaikal, Myladuthurai, Cuddalore, Puducherry, Villupuram & Chengalpattu districts), 65-75 kmph gusting to 85 kmph very likely over adjoining  westcentral Bay along and off South Andhra Pradesh (Nellore & Prakasham districts), Gulf of Mannar and along and off districts of south coastal districts of Tamil Nadu from 25^th November morning for subsequent 12 hrs.

(iii) Sea condition

Sea condition is rough to very rough over Southwest & adjoining west-central & southeast Bay of Bengal and along & off Tamil Nadu & Puducherry and south Andhra Pradesh coasts and over Gulf of Mannar. It would gradually become High over the southwest and adjoining west-central Bay of Bengal and along & off Tamil Nadu, Puducherry coast and very rough along and off south Andhra Pradesh coast and also over Gulf of Mannar on 24^th . The sea condition would be very high over the southwest and adjoining west-central Bay of Bengal and along & off north Tamil Nadu, Puducherry coasts and high along and off south Tamil Nadu & south Andhra Pradesh coasts and also over Gulf of Mannar on 25^th November, 2020.

(iv)  Strom Surge Warning

Tidal wave of about 1m height above the astronomical tide is very likely to inundate the low lying areas near the place of landfall.

(v)  Fishermen Warning

Fishermen are advised not to venture into Southwest & adjoining west-central & southeast Bay of Bengal, Gulf of Mannar and along & off Tamil Nadu, Puducherry and south Andhra Pradesh coasts during 23-25^th November. Also the fishermen out at Sea are advised to return to the coast and avoid the above sea area.

(vi) Damage expected over and Action suggested:

(vii) Fishermen Warning & Action Suggested:

The cyclonic storm “GATI” over north Somalia moved nearly westwards with a speed of about 15 kmph during past 06 hours, weakened into a Deep Depression and lay centered at 1130 hrs IST of 23^rd November 2020 over the same region near Latitude 10.7°N and Longitude 49.2°E, 220 km west-southwest of Ras Binnah (Somalia). It is very likely to move nearly westwards and weaken gradually into a depression during next 06 hours and into a well marked low pressure area during subsequent 06 hours.  

Forecast track and intensity are given below:

Date/Time(IST)

Position

(Lat. 0N/ long. 0E)

Maximum sustained surface 

wind speed (Kmph)

Category of cyclonic disturbance

23.11.20/1130

10.7/49.2

55-65 Gusting TO 75

23.11.20/1730

10.6/48.5

40-50 Gusting TO 60

23.11.20/2330

10.7/47.6

20-30 Gusting TO 40

 (i) Wind warning

Gale wind speed reaching 55-65 kmph gusting to 75 kmph is prevailing over Gulf of Eden along and off Somalia coast and 50-60 kmph gusting to 70 kmph prevails over southwest Arabian Sea along and off north Somalia coast during next 06 hours.  It will gradually decrease and becoming 40-50 kmph gusting to 60 kmph over the above areas during subsequent 06 hours.

(ii) Sea condition

Sea condition will be rough to very rough over Gulf of Eden along and off north Somalia coast and over southwest Arabian Sea during next 12 hours and improve thereafter.

(iii)  Fishermen Warning

Fishermen are advised not to venture into Gulf of Eden and southwest Arabian Sea along and off north Somalia coast during next 12 hours.

Kindly download MAUSAM APP for location specific forecast & warning, MEGHDOOT APP for Agromet advisory and DAMINI APP for Lightning Warning.

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

*****

NB/KGS/(IMD inputs)