DATE: 20-11-2023 Time of issue: 1230 Hrs IST
WEATHER FORECAST / WARNING FOR NEXT 7 DAYS
Day 3 Day 5
Day 1 Day 2 Day 4 Day 6
Met valid from 0830 valid from 0830
DAYS valid from 1230 hrs valid from 0830 hrs valid from 0830 hrs (25.11.2023)
Sub- hrs IST of hrs IST of
/ IST of 20.11.2023 to IST of 21.11.2023 to IST of 23.11.2023 to &
Division 22.11.2023 to 0830 24.11.2023 to
WARNINGS 0830 hrs IST of 0830 hrs IST of 0830 hrs IST of Day 7
hrs IST of 0830 hrs IST of
21.11.2023 22.11.2023 24.11.2023 (26.11.2023)
23.11.2023 25.11.2023
Rainfall CTN-FWS
FWS FWS FWS FWS
Tamil Nadu/ Distribution ITN-SCT
Puducherry Heavy rain is likely to Heavy to very heavy Heavy rain is
Heavy rain is likely to
& Karaikal occur at isolated places rain is likely to likely to occur at
occur at isolated places
over Tiruvallur, Chennai, occur at isolated isolated places
over Tiruvallur, Heavy to very heavy
Chengalpattu, places over Tenkasi, over Ghat areas of
Ranipet, Vellore, rain is likely to occur
Kancheepuram, Tirunelveli, Theni Coimbatore SCT SCT
Tiruvannamalai,
Villupuram, Cuddalore, and Dindigul at isolated places district, Nilgiris,
HRW Mayiladuthurai,
Tirupattur, Erode,
districts. Heavy rain Erode, Krishnagiri,
Salem, Dharmapuri, over Ghat areas of
Nagapattinam, Tiruvarur is likely to occur at Coimbatore district Dharmapuri,
Nilgiris, Coimbatore,
and Thanjavur districts isolated places over and Nilgiris. Tiruppur, Theni
Tiruppur, Theni and
of Tamilnadu, Tiruchirappalli, and Dindigul
Dindigul districts of
Puducherry & Karaikal Pudukkottai, districts of
Tamilnadu.
area. Nilgiris, Tamilnadu.
Coimbatore,
Tiruppur,
Heavy rain is likely
Virudhunagar,
Madurai, Sivaganga
to occur at isolated
and Kanyakumari places over Erode,
districts of Tiruppur, Theni,
Tamilnadu.. Dindigul, Madurai
and Virudhunagar
districts of
Tamilnadu
TSL/TSLG/
TSLH/ TSL TSL TSL TSL TSL
TSLHG
Rainfall
ISOL FWS WS WS WS
Distribution
Heavy to very heavy
Heavy to very heavy Heavy rain is
Heavy rain is likely to rain is likely to
Kerala & HRW NIL occur at isolated places occur at isolated
rain is likely to occur at likely to occur at
isolated places isolated places SCT SCT
Mahe places
TSL/TSLG/
TSLH/ TSL TSLG 30-40 TSLG 30-40 TSLG 30-40 TSLG 30-40
TSLHG
Rainfall
FWS FWS FWS FWS FWS
Distribution
Lakshadwee HRW NIL NIL NIL NIL NIL
FWS SCT
p TSL/TSLG/
TSLH/ NIL NIL NIL NIL NIL
TSLHG
Rainfall
DRY ISOL SCT FWS FWS
Distribution
Coastal Heavy rain is likely to
HRW NIL NIL NIL occur at isolated places
NIL SCT SCT
Karnataka
TSL/TSLG/ TSL TSL
TSLH/ NIL NIL NIL
TSLHG
Rainfall
DRY DRY ISOL SCT SCT
North Distribution
Interior HRW NIL NIL NIL NIL NIL ISOL DRY
Karnataka TSL/TSLG/
NIL NIL NIL NIL TSL
TSLH/
TSLHG
Rainfall
ISOL ISOL FWS FWS FWS
Distribution
South Heavy rain is likely Heavy rain is
Heavy rain is likely to
Interior HRW NIL NIL to occur at isolated
occur at isolated places
likely to occur at SCT ISOL
places isolated places
Karnataka
TSL/TSLG/
TSLH/ NIL NIL TSL TSL TSL
TSLHG
Rainfall
SCT SCT SCT SCT SCT
Coastal Distribution
Heavy rain is likely to Heavy rain is likely to
Andhra HRW occur at isolated places occur at isolated places
NIL NIL NIL
SCT ISOL
Pradesh & TSL/TSLG/ TSL TSL
Yanam TSLH/ TSL TSL NIL
TSLHG
Rainfall
ISOL SCT SCT FWS FWS
Distribution
HRW NIL NIL NIL NIL NIL
Rayalaseema SCT SCT
TSL/TSLG/ TSL TSL
TSLH/ TSL NIL NIL
TSLHG
Rainfall
DRY DRY ISOL ISOL SCT
Distribution
Telangana HRW NIL NIL NIL NIL NIL ISOL ISOL
TSL/TSLG/
TSLH/ NIL NIL NIL NIL NIL
TSLHG
Spatial rainfall distribution
% Stations % Stations
reporting Category reporting 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)
Subdivision Warnings colour
WATCH (BE UPDATED)
ALERT (BE PREPARED)
WARNING (TAKE ACTION)
TSL Thunderstorm & Lightning
TSLG Thunderstorm & Lightning with Gusty wind
TSLH Thunderstorm & Lightning with Hailstorm
TSLHG Thunderstorm, Lightning & Hailstorm with Gusty wind
Legends:
North Tamil Nadu (NTN) Chennai, Kancheepuram, Chengalpattu, Tiruvallur, Cuddalore, Villupuram, Tirupattur, Vellore, Ranipet,
districts Kallakurichi, Tiruvannamalai, Krishnagiri, Dharmapuri, Salem, Namakkal, Karur, Erode, Thanjavur,
Tiruvarur, Mayiladuthurai, Nagapattinam, Pudukottai, Nilgiris, Coimbatore, Tiruppur, Tiruchirapalli,
Ariyalur, Perambalur.
South Tamil Nadu (STN) Dindigul, Theni, Virudhunagar, Madurai, Sivagangai, Ramanathapuram, Thoothukudi, Thenkasi,
districts Tirunelveli, Kanyakumari.
Interior Tamil Nadu (ITN) Tirupattur, Vellore, Ranipet, Kallakurichi, Tiruvannamalai, Kancheepuram, Krishnagiri, Dharmapuri,
districts Salem, Namakkal, Karur, Erode, Nilgiris, Coimbatore, Tiruppur, Tiruchirapalli, Ariyalur,
Perambalur, Sivagangai, Virudhunagar, Theni, Dindigul, Madurai, Thenkasi.
North interior Tamil Tirupattur, Vellore, Ranipet, Kallakurichi, Tiruvannamalai, Kancheepuram, Krishnagiri, Dharmapuri,
Nadu (NITN) districts Salem, Namakkal, Karur, Erode, Nilgiris, Coimbatore, Tiruppur, Tiruchirapalli, Ariyalur, Perambalur.
South interior Tamil Sivagangai, Virudhunagar, Theni, Dindigul, Madurai, Thenkasi.
Nadu (SITN) districts
Coastal Tamil Nadu Tiruvallur, Chennai, Chengalpattu, Villupuram, Cuddalore, Thanjavur, Tiruvarur, Mayiladuthurai,
(CTN) districts Nagapattinam, Pudukottai, Ramanathapuram, Thoothukudi, Tirunelveli, Kanyakumari.
North Coastal Tamil Tiruvallur, Chennai, Chengalpattu, Villupuram, Cuddalore, Thanjavur, Tiruvarur, Mayiladuthurai,
Nadu (NCTN) districts Nagapattinam, Pudukottai.
South Coastal Tamil Ramanathapuram, Thoothukudi, Tirunelveli, Kanyakumari.
Nadu (SCTN) districts
Delta Districts Thanjavur, Tiruvarur, Nagapattinam, Mayiladuthurai, Pudukottai and Karaikal area.
Delta and Adjoining Thanjavur, Tiruvarur, Nagapattinam, Mayiladuthurai, Pudukottai, Karaikal and Tiruchirapalli, Perambalur,
districts Ariyalur, Cuddalore.
Western Ghat districts Nilgiris, Coimbatore, Tiruppur, Theni, Dindigul, Thenkasi, Virudhunagar
PDC Puducherry and Karaikal
