भारत सरकार GOVERNMENT OF

भारतीय मौसम विज्ञान विभाग INDIA METEOROLOGICAL DEPARTMENT

प्रादेशिक मौसम विज्ञान केन्द्र Regional Meteorological Centre

नयानं: 6, कालेज रोड, चेꅍनै – 600 006 DNewate :No. S un6, Collegeday 17 thRoad, December 2017–600 006 दरू भाष : 044- 28271951 Time of IssuePhone:: 08:00 044 IST- 282 71951

______Date: 04th December 2020 Time of Issue: 08:45 IST ______

Deep Depression over

The Deep Depression over Gulf of Mannar close to District coast remained practically stationary during past three hours and lay centered at 0530 hrs IST of 04th December over Gulf of Mannar near Lat. 9.1°N and Long. 78.6°E close to Ramanathapuram District coast, about 40 km southwest of Ramanathapuram, 70 km west- southwest of and 160 km northeast of Kanniyakumari. The associated wind speed is about 55-65 gusting to 75 kmph. The Deep Depression likely to move slowly west-southwestwards and cross Ramanathapuram and adjoining districts during next 06 hours with wind speed of 50-60 gusting to 70 kmph. It is very likely to weaken further into a Depression (wind speed 45-55 kmph gusting to 65 kmph) during next 12 hours.

(i) Heavy rainfall warning:

Sub-Divisions 04 Dec 2020* Rainfall at most places with heavy to very heavy falls at a few places South Tamilnadu

Rainfall at many places with heavy fall at isolated places North Tamilnadu, Puducherry & Karaikal

(ii) Wind warning • Squally wind speed reaching 55-65 kmph gusting to 75 kmph is very likely during next 06 hours along and off south Tamilnadu coast (Ramanathapuram, Thoothukudi, and Kanniyakumari districts) and it will gradually decrease to 45-55 kmph gusting to 65 kmph by evening of 4th December. • Squally wind speed reaching 35-45 kmph gusting to 55 kmph very likely to prevail along & off south Kerala coast during next 24 hours. • Squally wind speed reaching 35-45 kmph gusting to 55 kmph very likely over Lakshadweep-Maldives area and adjoining southeast Arabian Sea during next 24 hours.

(iii) Sea condition • Sea condition is rough to very rough over Gulf of Mannar and adjoining southwest Bay of Bengal, along & off south Tamilnadu, west coasts during next 12 1

hours and rough to very rough over Comorin Area, adjoining southeast Arabian Sea and along & off Kerala coast by evening of 4th December.

(vi) Fishermen Warning& Action suggested • Fishermen are advised not to venture into Gulf of Mannar and adjoining southwest Bay of Bengal and along & off south Tamilnadu coast and north Sri Lanka coasts during next 12 hours and along and off Kerala coast, Lakshadweep-Maldives area & adjoining southeast Arabian Sea during next 24-hours.

LEGEND:

Spatial rainfall distribution: % Stations reporting Rainfall Category 76-100 Widespread (WS/ most places) 51-75 Fairly Widespread (FWS/ many places) 26-50 Scattered (SCT/ few places) 1 -25 Isolated (ISOL) No Rain Dry

Rainfall intensity: Light rain 0.1-7.6 mm (upto 1 cm) Moderate rain 7.7-64.4 mm (2- 6 cm) Heavy rain 64.5 – 115.5 mm (7 – 11 cm) Very heavy rain 115.6- 204.4 mm (12 - 20 cm) Extremely heavy rain >204.4 mm (21 cm or more)

Districts: North (NTN) Chennai, Kancheepuram, Chengalpattu, Tiruvallur, districts Cuddalore, Villupuram, Kallakurichi, Thanjavur, Tiruvarur, Nagapattinam, Pudukottai, Vellore, Thirupattur, Ranipet, Tiruvannamalai, Krishnagiri, Salem, Dharmapuri, Namakkal, Nilgiris, , , Erode, Karur, Tiruchirapalli, Ariyalur, Perambalur. South Tamil Nadu (STN) Ramanathapuram, Tirunelveli, Thenkasi, Thoothukudi, districts Theni, Kanyakumari, Sivagangai, Virudhunagar, Dindigul, . Coastal Tamil Nadu (CTN) Chennai, Kancheepuram, Chengalpattu, Tiruvallur, districts Cuddalore, Villupuram, Thanjavur, Tiruvarur, Nagapattinam, Pudukottai, Ramanathapuram, Tirunelveli, Thoothukudi, Kanyakumari. Interior Tamil Nadu (ITN) Vellore, Tiruvannamalai, Kallakurichi,Krishnagiri, districts Dharmapuri, Salem, Namakkal, Nilgiris, Tiruppur, Coimbatore, Erode, Karur, Tiruchirapalli, Ariyalur, Perambalur, Sivagangai, Virudhunagar, Theni, Dindigul, Madurai, Thenkasi. North Interior Tamil Nadu Vellore, Thirupattur, Ranipet, Tiruvannamalai, (NITN) districts Kallakurichi,Krishnagiri, Dharmapuri, Salem, Namakkal, Nilgiris, Tiruppur, Coimbatore, Erode, Karur, Tiruchirapalli,

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Ariyalur, Perambalur. South Interior Tamil Nadu Sivagangai, Virudhunagar, Theni, Dindigul, Madurai, (SITN) districts Thenkasi. North Coastal Tamil Nadu Chennai, Kancheepuram, Chengalpattu, Tiruvallur, (NCTN) districts Cuddalore, Villupuram, Kallakurichi, Thanjavur, Tiruvarur, Nagapattinam, Pudukottai. South Coastal Tamil Nadu Ramanathapuram, Tirunelveli, Thoothukudi, Kanyakumari. (SCTN) districts Delta districts Thanjavur, Tiruvarur, Nagapattinam Puducherry (PDC) Puducherry and Karaikal

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