in mm (min 5 mm)
Arakonam – 66
Tiruttani – 55
Arakonam Agro – 50.5
Tiruvalangadu – 41
Tiruttani PTO – 41
Pallipattu – 40
Poonamalle – 28
RK Pet – 23
Kaveripakkam – 20
Sriperumbedur – 20
Vembakkam – 16
Tiruvallur – 15
Chembarambakkam – 15
Poondi Lake – 13
Korattur Anaicut – 12
Shollinganallur – 11
Wallajah – 11
Ponneri – 10
Walljahabad – 8
Katupakkam – 6
Kanchipuram – 5
Cheyyur – 5
The Depression (Ex Burevi) as a cyclone entered Palk Strait / Gulf of Mannar in the early hours on 3rd of December. It is more than 48 hours now and still remains there in Gulf of Mannar as Well Marked Low Pressure Area (WML_. And it is spinning up clouds up north to Cuddalore and Delta belt again.
Why is Depression (Ex Burevi) did not move ?
The Depression was caught between the two ridges and was stuck. Not under grip of both. So it is staying in one place. But it is weakened it will be pushed aside by low level easterly winds by tomorrow. Alomost 48 hours now, i have not personally witnessed something like this, in years of tracking weather. Normally the stalling happens in mid-lattitude systems in Gujarat in South West Monsoon. This is first time we are seeing
This will be the final stand of the WML (Ex Burevi) as it will be there till tomorrow noon and then will weaken into low pressure area and then it sends a pulse to Arabian Sea and the pulse will develop in Arabian sea and move away. There will be some pull effect or activated easterlies till 8th December for rains in Tamil Nadu. After that the rains will reduce and will be in for a break for 9/10 days.
What is should we expect till tomorrow ?
The same pattern of rains like yesterday will happen today too with Delta, Cuddalore, Villupuram, Tiruvannamalai, Perambalur, Ariyalur Pondy, Karaikkal, Chennai and KTC all ideally placed for rains with breaks being located in the northern pheriphery of the WML. The nearby areas such as Ramanthapuram, Madurai, Thoothukudi, Sivangagai, Pudukottai, Dindigul Sadly no respite for worst hit Cuddalore and Delta belt for one more day.
Interiors and West Tamil Nadu will join soon
Once the WML further weakens tomorrow, the winds will move interiors from 6-8th December, the interiors, West Tamil Nadu like Kovai, Nilgiris, Dindigul. Tiruppur, Theni will all join the Burevi Party. Kanyakumari yaru kannu pattucho theriyala, it is one district in south which has missed the rains completely.
Chennai rains with breaks will continue – tomorrow and coming days some pull effect / enhanced easterlies will give good rains for Chennai. Break in rains in Chennai after 8th December.
NEM Scorecard till 05.12.2020
Tamil Nadu – 386 mm (Normal till Dec 31 is 450 mm)
Chennai City – 975 mm (Normal till Dec 31 is 850 mm)
Massive rains for 3rd Day in the trot in Tamil Nadu, Tuty joins the party and KTCC having dream run too.
in mm (min 30 mm)
Cuddalore
Kothavacherry – 185
Bhuvanagiri – 154
Sethiyathope – 140
Srimushnam – 116
Annamalai Nagar – 99
Pollandurai – 97
Chidambaram – 85
Vadakuthu – 84
Kudithangi – 82
Vanamadevi – 82
Parangipettai – 78
Kurinjipadi – 78
Tozhudur – 73
Kilacheruvai – 69
Vridhachalam – 67
Lakkur – 58
Kuppanatham – 56
Panruti – 56
Kattumannarkoil – 54
Lalpet – 53
Me.Mathur – 49
Cuddalore – 49
Veppur – 30
Nagapattinam
Nagapattinam – 158
Tharangambadi – 128
Sirkali – 124
Thirupoondi – 110
Kollidam – 99
Thalanayar – 88
Mayiladuthurai – 82
Manalmedu – 77
Vedaranyam – 71
Tiruvarur
Kudavasal – 155
Nannilam – 67
Thiruthuraipoondi – 66
Tiruvarur – 66
Valangaiman – 65
Needamangalam – 64
Pandavaiyaru – 53
Tiruvannamalai
Vembakkam – 118
Chetpet – 62
Cheyyar – 54
Arni – 35
Kalasapakkam – 33
Polur – 32
Ramanathapuram
Rameswaram – 111
Mandapam – 78
Thangachimadam – 72
Pamban – 66
Paramakudi – 39
Vallinokam – 30
Ramanathapuram – 30
Thoothukudi
Kayalpattinam – 108
Thoothukudi – 89
Tiruchendur – 69
Srivaikundam – 65
Vaippar – 63
Kadambur – 62
Ottapidaram – 61
Kulasekarapatnam – 55
Tiruchendur AWS – 52
Maniyachi – 48
Kayathar – 47
Sattankulam – 44
Satankulam AWS – 42
Ettayapuram – 37
Kovilpatti – 35
Kayathar AWS – 34
Vilathukulam – 33
Surankudi – 33
Perambalur
Labbaikudikadu – 80
Eraiyur – 55
V.Kalathur – 36
Villupuram
Villupuram – 74
Valvanur – 44
Koliyanur – 43
Anandhapuram – 41
Kedar – 39
Kanjanur – 39
Vanur – 37
Marakkanm – 34
Thanjavur
Thiruvidaimaruthur – 70
Manjalaru – 52
Kumbakonam – 50
Lower Anaicut – 38
Neivasal Thenpathi – 33
Budalur – 30
Thenkasi
Karuppandhi Dam – 70
Tenkasi – 49
Sankarankovil – 48
Shencottai – 47
Sivagiri – 40
Gundar – 39
Adavinyanar – 31
Ramanadhi – 30
Tirunelveli
Lower Papanasam – 63
Servalar – 60
Mullaikaraipatti – 60
Manimutharu – 55
Palayamkottai – 53
Papanasam – 53
Tirunelveli AWS – 46
Kanndiyan – 38
Kalakkad – 34
Ambasamudram – 33
Tirunelveli – 32
Kanyakumari
Upper Kodayar – 66
Lower Kodayar – 48
Chittar II – 30
Virudhungar
Rajapalayam – 42
Vembakottai – 36
Aruppukottai – 33
Virudhungar – 30
Sivakasi – 30
Ranipet
Kaveripakkam – 36
Arakonnam – 30
Wallajah – 30
Others
Karaikkal, Karaikkal – 156
Palani, Dinsigul – 54
Kuppanampatti, Madurai – 45
Sendurai, Ariyalur – 40
Manamadurai, Sivagangai – 40
Kodaikanal, Dindigul – 39
Glenmorgan, Nilgiris – 35
Ilayangudi, Sivagangai – 32
Kalligudi, Madurai – 32
Pondy, Pondy – 31
Jayankondam, Ariyalur – 31
Pappireddipatti, Dharmapuri – 30
Harur, Dharmapuri – 30
Ayinkudi, Pudukottai – 30
KTCC (Chennai and Surrounding Regions) rainfall on 05.12.2020
in mm (min 30)
DGP Office (Mylapore) – 120
Vembakkam (Near Kancheepuram) – 118
Anna University (Guindy) – 110
Sriperumbudur – 99
KK Nagar – 98
Uthukottai – 95
Gummidipoondi – 81
Chembarabakkam – 78
Shollinganallur – 77
Aynavaram – 74
Poonamallee – 68
Alandur – 64
Chennai Collectorate (Parrys) – 64
Kancheepuram – 61
Perambur – 59
Walajabad – 56
Tondiarpet – 56
Cholavaram – 51
Tiruvallur – 46
Tambaram Taluk Office – 42
Meenambakkam – 14
Ponneri – 39
Koratur Anaicut – 38
Thamaraipakkam – 37
Nungambakkam – 35
Tiruttani – 34
Redhills – 32
West Tambaram (Somangalam) – 31
Ambattur – 30
Poondi – 30
Uthiremerur – 30
Taramani – 30
Right from start of the year the Core Chennai City (Old City Areas) was missing all the spells and in South West Monsoon Nungambakkam ended with just 293 mm rainfall in 4 months (lowest rains in last 10 years) while Meenambakkam recorded whopping 597 mm in the same period. You can see twice the amount of rainfall had fallen other parts of Chennai while core areas had not much luck, it happened to miss all the Damal Dumeel Storms in SWM. Infact in all my posts i started to quote Nungambakkam as cursed or desert. This all started to change from October, in North East Monsoon, the places close to sea always has the advantage than the places over inland areas.
The morning of 29th October was a special event for Chennai, the Damal Dumeels brought the memories of November 23, 2015, when dryline-wetline event happened with thunders. Not often you would have seen such thunder in your lifetime, it was very intense ones. The dry air mixed with the moist air and the collusion created so much instability which resulted in such high number of thunders.
The rainfall was split by 6.00 am cut-off time and the rainfall which fell after 6.00 am on 29th October was added into 30th October rainfall. Technically, the rains started at around 3.00 am on 29th October and fell within a space of 6 hours, Mylapore got close to 300 mm and most of which fell in a space of 3 hours. Such was the intensity of the rains, blinding ones at times. The last time a place in Chennai crossed 250 mm rainfall in 24 hours was in November 3rd, 2017, when same Myalpore (DGP Office) recorded whopping 296 mm rainfall which too fell in few hours time.
It was perfect balancing act of Nature for the Core City, indeed and the curse seems to be lifted.
More good spells are due in this 2020 Monsoon. Some spells will be always remembered by me for lifetime for pure uniqueness and my personal favorites over the last 30 years