இந் ய அர GOVERNMENT OF INDIA இந் ய வானிைல ஆய் ைற மண்டல வானிைல ஆய் ைமயம் INDIA METEOROLOGICAL DEPARTMENT Regional Meteorological Centre 6,கல் ரி சாைல, ெசன்ைன - 600006 No. 6, College Road, Chennai–600006 ெதாைலேப : 044- 28271951. Phone: 044- 28271951.
DATE: Monday, October 4, 2021 (12 Asvina 1943 SAKA) Time of Issue:2030 Hrs IST
CHENNAI REGIONAL FORECAST
Rainfall Forecast / Warning for next 5 days Day 1 Day 2 Day 3 Day 4 Day 5 WX outlook for subsequent 2 valid from 2030 hrs valid from 0830 hrs valid from 0830 hrs valid from 0830 hrs valid from 0830 hrs days valid Met Sub- IST of 05.10.2021 IST of 07.10.2021 IST of 08.10.2021 IST of 04.10.2021 IST of 06.10.2021 from 0830 hrs Division up to 0830 hrs IST up to 0830 hrs IST of up to 0830 hrs IST of up to 0830 hrs IST up to 0830 hrs IST of 09.10.2021 to of 06.10.2021 08.10.2021 09.10.2021 of 05.10.2021 of 07.10.2021 0830 hrs IST of 11.10.2021 Forecast Warning Forecast Warning Forecast Warning Forecast Warning Forecast Warning Heavy to very heavy Heavy to rain is very heavy likely to rain is likely occur at to occur at isolated isolated places places over over Ariyalur, Theni, Perambalur, Dindigu Cuddalore, l, Delta Thenkas districts of Heavy rain i and Tamilnadu, is likely to Madurai South Tamil Nadu occur at districts isolated Tamil Heavy places over Krishnagiri, Nadu/ rain is No Signi- also Tirupattur, Dharmapuri Puducherr WS likely to WS WS FWS NIL SCT NIL ficant , Nilgiris, y & occur at Heavy rain chane is also likely Coimbatore Karaikal isolated , Ariyalur, places to occur at isolated Perambalur over , Theni and places over Sivagan Dindigul ga, Villupuram, districts Kanyak Kallakurichi umari, , Karur, Coimbat Nilgiris, ore, Coimbatore, Nilgiris, Theni, Erode, Dindigul, Virudhu Salem and nagar, Namakkal Tiruchir districts, apalli Puducherry, and Karaikal Delta districts Isolated heavy to Heavy to very Heavy very heavy rain rain is heavy rain No Signi- Kerala & with likely to is likely to ficant WS WS isolated WS occur at WS NIL FWS NIL Mahe occur at extremely isolated change isolated heavy rain places places is likely to occur No Signi- Lakshadw Heavy WS NIL WS rain is WS NIL FWS NIL FWS NIL ficant eep likely to change
occur at isolated places Heavy to Heavy Heavy very rain is rain is heavy rain No Signi- Coastal likely to likely to is likely to ficant WS occur at WS occur at WS WS NIL FWS NIL Karnataka occur at isolated isolated change isolated places places places Heavy Heavy rain is rain is North likely to No Signi- likely to occur at ficant Interior SCT NIL SCT NIL FWS occur at FWS FWS NIL isolated Karnataka isolated change places places Heavy to Heavy Heavy very rain is rain is South heavy rain No Signi- likely to likely to is likely to ficant Interior WS occur at WS WS occur at WS NIL FWS NIL occur at Karnataka isolated isolated change isolated places places places Coastal No Signi- Andhra ficant Pradesh & ISOL NIL SCT NIL SCT NIL FWS NIL SCT NIL change Yanam No Signi- Rayalasee ISOL NIL SCT NIL SCT NIL SCT NIL SCT NIL ficant ma change No Signi- Telangana SCT NIL SCT NIL SCT NIL SCT NIL SCT NIL ficant change
Spatial rainfall distribution % Stations reporting % Stations reporting Category Category Rainfall Rainfall 76-100 Widespread (WS/ most places) 26-50 Scattered (SCT/a few places) 51-75 Fairly Widespread (FWS/ many places) 1 -25 Isolated (ISOL/one or two places) No Rain Dry
Rainfall intensity 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)
LEGEND:
Chennai, Kancheepuram, Chengalpattu, Tiruvallur, Cuddalore, North Tamil Nadu Villupuram, Kallakurichi, Thanjavur, Tiruvarur, Nagapattinam, (NTN) districts Pudukottai, Vellore, Thirupattur, Ranipet, Tiruvannamalai, Krishnagiri, Salem, Dharmapuri, Namakkal, Nilgiris, Tiruppur, Coimbatore, Erode, Karur, Tiruchirapalli, Ariyalur, Perambalur. South Tamil Nadu Ramanathapuram, Tirunelveli, Thenkasi, Thoothukudi, Theni, (STN) districts Kanyakumari, Sivagangai, Virudhunagar, Dindigul, Madurai. Vellore, Thirupattur, Ranipet, Tiruvannamalai, Krishnagiri, Interior Tamil Nadu Dharmapuri, Salem, Namakkal, Nilgiris, Tiruppur, Coimbatore, (ITN) districts Erode, Karur, Tiruchirapalli, Ariyalur, Perambalur, Sivagangai, Virudhunagar, Theni, Dindigul, Madurai, Thenkasi. North interior Tamil Vellore, Tiruvannamalai, Krishnagiri, Dharmapuri, Salem, Nadu (NITN) districts Namakkal, Nilgiris, Tiruppur, Coimbatore, Erode, Karur, Tiruchirapalli, Ariyalur, Perambalur. South interior Tamil Sivagangai, Virudhunagar, Theni, Dindigul, Thenkasi, Madurai. Nadu (SITN) districts Chennai, Kancheepuram, Chengalpattu, Tiruvallur, Cuddalore, Coastal Tamil Nadu Villupuram, Kallakurichi, Thanjavur, Tiruvarur, Nagapattinam, (CTN) districts Pudukottai, Ramanathapuram, Tirunelveli, Thoothukudi, Kanyakumari. North Coastal Tamil Chennai, Kancheepuram, Chengalpattu, Tiruvallur, Cuddalore, Nadu (NCTN) Villupuram, Kallakurichi, Thanjavur, Tiruvarur, Nagapattinam, districts Pudukottai. South Coastal Tamil Ramanathapuram, Tirunelveli, Thoothukudi, Kanyakumari. Nadu (SCTN) districts Delta districts Thanjavur, Tiruvarur, Nagapattinam.
PDC Puducherry.