Groundwater levels (observation wells) in Chennai and others districts of Tamil Nadu

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