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Well the North East Monsoon type rains will continue for next 2 days with an UAC located in SW bay and pushing convergence in the north will seen over Central Coastal Tamil Nadu to South Tamil Nadu particularly in parts of Delta region (Nagapattinam, Tiruvaraur, Thanjavur) and South Tamil Nadu regions (Ramanthapuram, Sivagangai, Pudukottai, Nellai, Thenkasi Kanyakumari, Thoothukudi) and even other nearby areas.
Reason for rains
There is an Upper Air Circulation (UAC) in South West of Sri Lanka and as a result the convergence of easterlies are happening over North East Sri Lanka and Delta to South TN coast. Typical monsoon rains.
Good Rains are expected in next 2 days in Nagai, Thanjavur & Tiruvarur districts and moderate rains in Tuty, Ramanathapuram, Nellai, Kanyakumari, Thoothukudi, Pudukukottai, Cuddalore, Thenkasi, etc. Light rains are possible in Nilgiris and Coimbatore district too.
Is this the last rains for the month ?
No No, we already informed that monsoon will extend into February this year and more rains will start from month end around January 29/30, 2021. Breaks in North east monsoon are common. So there will be break in rains from 22nd January only to start again in 29/30th January. So the all time record rainfall in January is going to be broken for sure.
Tamil Nadu All time Top January Rainfall years under threat
in mm (100 mm and above)
Normal for TN in January is 18 mm
1921 – 141.2
2021 – 137.7 (till 20.01.2021) – High chance to break the ATR, 2021 deserves to be in No.1
1923 – 136.0
1920 – 135.9
1909 – 116.5
1943 – 112.0
Please refer previous post for understanding the pattern / reason. Same wind pattern remains like yesterday and we have thunderstorms both in Northern and Southern Suburbs. The wind pattern shows that the Southern storms will flank down a bit and give rains to west and southern suburbs of Chennai. While Northern storms have almost reached close to the coast. So Mostly drizzles or light rains to core city areas. But there is one more day tomorrow for thunderstorms.
Heavy Rains lashed Bangalore and Krishnagiri, Tiruvannamalai, Tirupattur are also seeing thunderstorms right from evening. Tomorrow again these places in North TN, Bangalore will all get rains and Chennai too has good chance tomorrow.
Two more days we have to say Good bye to Red Thakkali Season and then wait for 8 more months from next June. Lets enjoy the final few Damal Dumeels of the season with NEM is just 5 days away.
Rainfall on 23.10.2020 in KTC and Chennai
——————-
in mm (official stations min 20 mm)
This is the heaviest rains in KTC in this year 2020. The cursed Nungambakkam got semma spell and was also its wettest day of the year.
Pallipattu – 170
Sholingur – 165
R.K.Pet – 135
Thamaraipakkam – 109
Sriperumbedur – 108
Tiruttani – 93
Tiruttani PTO – 92
Madurantagam – 74
Tiruvallur 72
Nungambakkam – 69
Uthiramerur – 69
Gummidipoondi – 69
Vembakkam – 65
Thiruvalangadu – 64
Sholinganallur – 60
Ayanavaram – 59
Cheyyur – 58
Entry Point – 58
Arakkonam – 56
Redhills – 56
Arakonnam Agro – 55
Maduravoyal – 55
Korattur Anaicut – 55
Tondiarpet – 52
Ponneri – 51
Meenambakkam – 51
Kelambakkam – 50
Kancheepuram – 50
Kaveripakkam – 50
Perambur – 47
Central – 45
Shenoy Nagar – 42
Sathyabama University – 42
Valsarawakkam – 41
Puzhal – 41
Chembarabakkam – 39
Poonamallee – 37
Ambattur – 36
Adyar – 36
Uthukottai – 35
Teynampet – 34
Anna Nagar West – 33
Tiruporur – 33
Poondi Lake – 33
Hindustan University – 31
Velacherry – 30
Manali – 30
KK Nagar – 29
Guindy – 29
Royapuram – 27
Mugaliwakkam – 26
Cholavaram – 26
Tambaram Taluk Office – 25
Mylapore DGP office – 25
Kolathur – 25
Tirukalakundram – 23
Parrys – 23
Chengalpattu – 22
Mahabalipuram – 20
Good inflow can be expected into Poondi Tomorrow.