According to the Cyclone Warning Division of the India Meteorology Department, Delhi:

Cyclonic Storm “NIVAR” over southwest Bay of Bengal        

Yesterday’s very severe cyclonic storm over southwest Bay of Bengal (BoB) moved northwestwards and crossed  Tamilnadu and  Puducherry coasts near Puducherry  during 2330 IST of 25^th to 0230 IST of 26^th November as a very severe cyclonic storm with an estimated wind speed of 120-130 kmph gusting to 145 kmph. Continuing to move northwestwards, it weakened into a Severe Cyclonic Storm over north coastal Tamilnadu in the early morning hours (0230 hrs IST) and further into a cyclonic storm in the morning (0830 hrs IST) of today, the 26th November, 2020. It lay centred at 0830 hrs IST of today, the 26th November, 2020 over the same region near Lat. 12.6°N and Long 79.4°E, about 85 km north-northwest of Puducherry and about 95 km west-southwest of Chennai.                        

The Cyclonic Storm ‘NIVAR’ would continue to move northwestwards and weaken further into a Deep Depression during next 06 hours and into a depression by subsequent 06 hours.

Forecast track and intensity are given below:

Warnings:

(i) Rainfall

Under its influence, rainfall at most/many places with heavy to very heavy  falls  at a  few places and isolated extremely heavy falls likely to occur over  Chittoor, Kurnool, Prakasam; Cuddappa districts of Andhra Pradesh and adjoining southeast Telangana on 26^th Nov.  Heavy to very heavyrainfall at isolated places are very likely over north Tamilnadu, remaining districts of Andhra Pradesh and southeast Telangana.

(ii) Wind warning

• Gale wind speed reaching 70-80 kmph gusting to 90 kmph is prevailing over Southwest Bay of Bengal. It will gradually decrease becoming 50-60 kmph gusting to 70 kmph by evening of today, the 26^thNovember, 2020.
• Gale wind speed reaching 70-80 kmph gusting to 90 kmph is prevailing along & off Puducherry, Villupuram, Chengalpattu, Kanchipuram, Chennai &Tiruvallu districts of north Tamil Nadu. It will gradually decrease becoming 50-60 kmph gusting to 70 kmph by evening and squally wind speed reaching 35-45 kmph gusting to 55 kmph by night of today, the 26^thNovember, 2020.
• Squally wind speed reaching 45-55 gusting to 65 kmph very likely to prevail over interior districts (Ranipet, Tiruvannamalai, Tirupattur, Vellore) of Tamilnadu and Chittoor district of Andhra Pradesh till noon of today, 26^thNovember, 2020 and gradual decrease thereafter.
• Squallywind speed reaching35-45 gusting to 55 kmph very likely over Nagapattinam, Karaikal, Myladuthurai, Cuddalore&Tiruvarurdistricts of Tamilnadu during next 06 hours and gradual decrease thereafter.

(iii) Sea condition

• Sea condition is very rough to high over Southwest Bay of Bengal, along & off north Tamil Nadu, Puducherry coast. It will gradually become very rough to rough by afternoon of 26^th Nov and improve further by night of 26^th Nov.
• Sea condition is rough to very rough over westcentral Bay of Bengal and along & off south Andhra Pradesh coast. It will improve after 06 hours.

(iv) Damage expected over Villupuram, Chengalpattu, Tiruvarur, Kanchipuram, Chennai, Tiruvallaur, Ranipet, Tiruvannamalai, Tirupattur, Vellore districts of Tamilnadu, Puducherry and Nellore & Chittoor districts of Andhra Pradesh during next 03 hours:

• Partial damage to thatched houses/ huts with possibility of roof tops being blown off and unattached metal sheets may fly.
• Partial damage to power and communication lines.
• Damage to Kutcha and some damage to Pucca roads. Flooding of escape routes.
• Breaking of tree branches, uprooting of small trees. Damage to banana and papaya trees, horticulture and crops & orchards.

viii)   Fisherman Warning till evening of today, 26^thNovember, 2020:

• Total suspension of fishing operations
• Movement in motor boats and small ships unsafe.
• Fishermen are advised not to venture into southwest & adjoining westcentral Bay of Bengal during next 12 hours.

(ix)   Action Suggested during next 03 hours:

• People in affected areas to remain in safe places and indoors.
• Judicious regulation of rail, road and air traffic.
• People  are advised  to  remain  indoors/in  safe  places  and  cooperate  with  state  government  officials  and  disaster  management  agencies.

Chief amounts of 24 hours past rainfall (cm) ending at 0830 hours IST of today, the 26th November, 2020 recorded over Tamilnadu& Puducherry are given in Annexure 1: The system is under continuous surveillance and the concerned state governments are being informed regularly.

DWR Chennai Imagery based on 0930 IST of 26^th November, 2020

INSAT-3D  Imagery based on 0800 IST of 26^th November, 2020

Annexure 1

Chief amounts of 24 hours past rainfall (cm) ending at 0830 hours IST of today, the 26th November, 2020 over Tamilnadu, Puducherry &Karaikal:

Tambaram  (dist Chengalpattu) 31, Pondicherry (dist Puducherry) 30, Vilupuram (dist Villupuram) 28, Cuddalore (distCuddalore) 27, DGP Office (dist Chennai) 26, Sholinganallur (dist Chennai) 22, Thamaraipakkam (dist Tiruvallur) 19, Parangipettai (distCuddalore) 18, Pallipattu (dist Tiruvallur) 17, Cholavaram (dist Tiruvallur) 16, Gingee (dist Villupuram), Poonamallee (dist Tiruvallur), Ambathur (distruvallur), Mahabalipuram (dist Chengalpattu), Tiruvallur (dist Tiruvallur), Gummidipoondi (dist Tiruvallur) 15 each,

Tindivanam (dist Villupuram), Maduranthagam (dist Chengalpattu), Chembarabakkam (dist Tiruvallur), Anna University (dist Chennai), Vanur (dist Villupuram), Kollidam (distNagapattinam), Bhuvanagiri (distCuddalore) 14 each,

Mgr Nagar (dist Chennai), Kancheepuram (dist Kancheepuram), Kurinjipadi (distCuddalore), Alandur (dist Chennai), Chidambaram Aws (distCuddalore), Red Hills (dist Tiruvallur), Marakkanam (dist Villupuram), Chengalpattu (dist Chengalpattu), Tiruttani (dist Tiruvallur), Chidambaram (distCuddalore) 13 each,

Ulundurpet (distKallakurichi), Poondi (dist Tiruvallur), Vadapudupattu (distTirupathur), Keelpennathur (dist Tiruvannamalai), Koratur (dist Tiruvallur), Sirkali (distNagapattinam) 12 each,

Chennai Ap (dist Chennai), Vandavasi (dist Tiruvannamalai), Sethiyathope  (distCuddalore), Vembakkam (dist Tiruvannamalai), PoonamalleArg (dist Tiruvallur), Arakonam (distRanipet), Thirukalukundram (dist Chengalpattu), Sriperumbudur (dist Kancheepuram), Panruti (distCuddalore) 11 each,

Ponneri (dist Tiruvallur), Arcot (distRanipet), TaramaniArg (dist Chennai), Perambur  (dist Chennai), Uthiramerur (dist Kancheepuram), Sholingur (distRanipet), Cheyyur (dist Chengalpattu) 10 each,

Anna UtyArg (dist Chennai), ChembarambakkamArg (dist Tiruvallur), Thiruvalangadu (dist Tiruvallur), Tirukoilur (distKallakurichi), Polur (dist Tiruvannamalai), Mayiladuthurai (distNagapattinam), Thirupporur (dist Chengalpattu), Kelambakkam (dist Chengalpattu), Karaikal (distKaraikal), Manalmedu (distNagapattinam), PuzhalArg (dist Tiruvallur) 9 each,

Arani (dist Tiruvannamalai), Chennai(n) (dist Chennai), Hindusthan University (dist Chengalpattu), Vepur (distCuddalore), Vridhachalam (distCuddalore), Ammundi (dist Vellore), Vellore (dist Vellore), R.k.pet (dist Tiruvallur), Kodavasal (distTiruvarur), Manjalaru (dist Thanjavur) 8 each,

Uthukottai (dist Tiruvallur), AgaramSeegoor (distPerambalur), Kaveripakkam (distRanipet), Ambur (distTirupathur), TiruttaniPto (dist Tiruvallur), Tozhudur (distCuddalore), Tarangambadi (distNagapattinam), Pelandurai (distCuddalore), Tiruvannamalai (dist Tiruvannamalai), Srimushnam (distCuddalore), Ennore Aws (dist Tiruvallur), Needamangalam (distTiruvarur), Sendurai (distAriyalur), Cheyyar (dist Tiruvannamalai), Katpadi (dist Vellore), Aduthurai Aws (dist Thanjavur) 7 each.             

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

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NB/KGS/(IMD inputs)