Pre-monsoon Toppers, Records, Rainfall Analysis in May Month in Kanyakumari and Kerala

June 1, 2021
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It has been one awesome hot weather season for Kerala and Kanyakumari. Lets see some of the stats from one of the wettest season. Some of the data courtesy to West coast weatherman.
1. Top Kerala Pre-monsoon rainfall (Mar-May)
1933 – 915.2
1960 – 791
1932 – 788
1918 – 767
2004 – 758.4
2021 – 750.9 (6th Wettest)
Normal for Mar to May for Kerala – 361.5
Now a basic question comes, though it does not make sense logically or technically. Lets see if massive Pre-monsoon rains have any co-relation with SW Monsoon (Jun -Sept) rainfall
1933- Excess
1960- Normal
1932 – Below normal
1918 – Flop
2004 – Below normal
2021 – Below normal predicted by Official Agency. But with Kerala monsoon, i dont think it is so easy to predict monsoon months ahead. Eg. 2020 September was wettest in 150 years. From 2018, it has been breaking records one month or another. And August and September looks very good indeed even this year too.

 

2. Top May month rainfall for Kerala

1933 – 738
1918 –  683
1932 – 646
2004 – 604
2021 – 569 (5th Wettest)

For the May month, it has been 5th wettest in 120 years for Kerala, the last time kerala got massive rains in May month was also during cyclone in 2004.  All the Top months for Kerala had a cyclone in Arabian sea. The 1933 cyclone, 1932 cyclones, 2004 cyclone and 2021 Tauktae.

3. Top Kanyakumari district Premonsoon rainfall (Mar-May)

1933 – 863.1
2021 – 639.1 (2nd Wettest)
1932 – 591.6
1959 – 540.8
1960 – 527.4
1995 – 508.2
Normal for Kanyakumari in Mar to May – 273.4 mm.
Thanks to Cyclone Taukate which pulled the moist cross equatorial winds, it has been 2nd wettest ever pre-monsoon for Kanyakumari.
4. Top May month Kanyakumari district rainfall

1933 – 715.9
2021 – 527.6 (5th Wettest)
1932 – 436.5
1959 – 383.6
1960 – 366.1
1918 – 354.9

2021 ends as 2nd best Pre-monsoon rainfall for Kanyakumari district and again like kerala, the rainfall in 1993, 2021, 1932, 1959, 1960 and 1995 all had cyclones.

 

5. Premonsoon (March to May) Toppers in Tamil Nadu

in mm (550 mm)

  1. Perunchani Dam, Kanyakumari – 1061
  2. Puthan Dam, Kanyakumari – 1030
  3. Chittar II Dam, Kanyakumari – 1030
  4. Upper Kodayar, Kanyakumari – 1027
  5. Chittar I Dam, Kanyakumari – 992
  6. Pechiparai Dam, Kanyakumari – 976
  7. Kuzhithurai, Kanyakumari – 966
  8. Suralacode, Kanyakumari – 867
  9. Eraniel, Kanyakumari – 862
  10. Lower Kodayar, Kanyakumari – 838
  11. Mylaudy, Kanyakumari – 793
  12. Nagercoil, Kanyakumari – 702
  13. Kalial, Kanyakumari – 699
  14. Sholayar Dam, Coimbatore – 665
  15. Periyakallar (Valparai PTO), Coimbatore – 664
  16. Chinnakallar, Coimbatore – 648
  17. Valparai PAP, Coimbatore –  59 2
  18. Periyar Dam, Theni – 571
  19. Cincona, Coimbatore – 567
  20. Thuckalay, Kanyakumari –  566
  21. Valparai Taluk Office, Coimbatore – 558

The toppers were dominated by Kanyakumari stations.

 

6. Premonsoon (March to May) Toppers in Kerala

in mm (1000 mm)

  1. Kottarakkara, Kollam – 1979
  2. Pathanamthitta, Pathanamthitta – 1561
  3. Konni, Pathanamthitta – 1461
  4. Punalur, Kollam – 1370
  5. Kanjirapally, Kottayam – 1334
  6. Neyyar Dam, Trivandrum – 1279
  7. Moozhiyar, Pathanamthitta  – 1225
  8. Aryanad, Trivandrum – 1219
  9. Vamanapuram, Trivandrum – 1204
  10. Konni Estate, Pathanamthitta – 1201
  11. Ponmudi, Trivandrum – 1200
  12. Mundakayam, Idukki – 1193
  13. Keerampara, Ernakulam – 1187
  14. Kollakadavu, Pathanamthitta – 1137
  15. Kurudamannil, Pathanamthitta – 1122
  16. Erattupetta, Kottayam – 1118
  17. Perumthenaruvi, Pathanamthitta – 1092
  18. Bhoothathankettu, Ernakulam – 1081
  19. Kakki Dam, Pathanamthitta – 1072
  20. Kottayam, Kottayam – 1047
  21. Boyce Estate, Idukki – 1041
  22. Kakkayam, Kozhikode – 1038
  23. Alapuzha, Alapuzha – 1018
  24. Pulingome, Kannur – 1000
The southern Kerala districts has dominated the premonsoon season.

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Tamil nadu rainfall on 01.05.2020.

May 1, 2020

What an end to the April Rains current spell, Virudhnagar got semma rains. TN rainfall on 01.05.2020. Some district data are missing due to lockdown.
————————-
in mm

Virudhunagar
————-
Sivakasi – 120
Srivilliputhur – 89
Sattur – 51
Vembakottai – 28
Watrap – 24
Pilavakkal – 10

Thanjavur
————
Madukkur – 74
Thiruvidaimarudur – 36
Manjalaru – 28

Tiruvarur
————
Nannilam – 69
Muthupet – 36
Thiruthuraipoondi – 27

Thoothukudi
————
Kadambur – 61
Kovilpatti Agro – 28
Kovilpatti – 24
Maniyachi – 12
Ottapidaram – 10
Sathankulam – 10

Kanyakumari
—————-
Suralacode – 57
Chittar II – 50
Perunchani – 48
Puthen Dam – 47
Chittar I – 42
Lower Kothayar – 40
Lower Kothayar AWS – 35
Kuzhithurai – 22
Pechiparai – 20
Kaliel – 10
Upper Kodayar – 10

Coimbatore
—————–
Valparai PTO – 51
Cincona – 43
Chinnakallar – 18
Sholayar Dam – 17
Pollachi – 15

Pudukottai
————
Ayinkudi – 34
Kilanilai – 32
Nagudi – 29
Mimisal – 13
Avadaiyarkoil – 12
Aranthangi – 11

Theni
———
Manjalar – 20
Periyar Dam – 16
Manalar Dam – 10
Aranmananipudur – 10

Nilgiris
———–
Ooty – 13
Kundah Bridge – 11
Kotagiri – 11

Others
———
Madurai ISRO, Madurai – 14
Tiruvadanai, Ramanathapuram – 46
Sankarankovil, Thenkasi – 13
Nagapattinam, Nagapattinam – 10

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Sirkazhi record rains in comparison with historical heavy 24 hrs Rains in Delta / Tamil Nadu

November 12, 2022

Sirkazhi previous highest 24 hrs rainfall was 399 mm recorded on 15th November 1991. What we witnessed in Sirkazhi is a special event. The intense cloud banding around the centre of the Low Pressure fell over Mayiladuthurai district. The Sirkazhi Agro readings crossed 550 mm in 24 hrs and the official data is out with 436 mm in 24hrs ending on 12th November, 2022, with this Sirkazhi has broken its previous record of its all time rainfall of 399 mm and makes it into one of the all time best spells for Delta region. Must have caused enormous damage to the corps there in Mayiladuthurai district.

Delta-Cudddalore belt 24 hrs rainfall

1. 656 mm at Orathanadu (Thanjavur dt) on November 27, 2008 (Cyclone Nisha)
2. 572 mm at Cuddalore on May 18, 1943
3. 528 mm at Thanjavur on November 27, 2008 (Cyclone Nisha)
4. 500 mm at Vedaranniyam (Nagapattinam dt) on November 18, 1918
5. 500 mm at Palaviduthi (Tiruchirapalli dt) on October 31, 1981
6. 482 mm at Neyveli (Cuddalore dt) on November 9, 2015
7. 480 mm at Papanasam (Thanjavur dt) on Novemebr 7, 1917
8. 480 mm at Karaikal (Puducherry) on November 15, 1991
9. 480 mm at Kuppanatham (Cuddalore dt) on November 15, 1991
10. 436 mm at Sirkazhi, (Mayiladuthuri dt) on November 12, 2022
10. 418 mm at Vedaranniyam (Nagapattinam dt) on November 27, 2008 (Cyclone Nisha)

Data collection started for me 25 years ago and i have visited all these freak places in the last 10 years to understand the rainfall pattern particularly the ghats in nilgiris, lets see the top 24 hrs rainfall event across Tamil Nadu. Even spent 5k rupees for a old niliris book to be shipped from USA to know the wettest place of Tamil Nadu i.e Mukurthi Ridge Top with close 6500 mm annual rains. There are few more legends like Sivasilam in Thenkasi dt where 24 hrs data are not available.

Tamil Nadu Top 24 hrs Rainfall

min 450 mm

965 mm at Kakkachi (Tirunelveli dt) on 14th November, 1992
911 mm at Avalanchi (Nilgris dt) on 9th August, 2019
821 mm at Manjolai (Tirunelveli dt) on 14th November, 1992
820 mm at Ketti (Nilgris dt) on November 10, 2009 (Cyclone Phyaan)
820 mm at Avalanchi (Nilgris dt) on 8th August, 2019
713 mm at Western Catchment III (Nilgiris dt), July 07, 1958
709 mm at Vandavasi (Thiruvannamalai dt) on August 5, 1965
656 mm at Orathanadu (Thanjavur dt) on November 27, 2008 (Cyclone Nisha)
648 mm at Mukurthi Ridge Top (Nilgiris dt) on 13th July, 1943
635 mm at Mukurthi Ridge Top (Nilgiris dt) on 12th July, 1943
612 mm at Nalamukku (Tirunelveli dt) on 14th November, 1992
600 mm at Parsons Valley (Nilgris dt) on 9th August, 2019
581 mm at Avalanchi (Nilgris dt) on August 06, 2020
572 mm at Cuddalore on May 18, 1943
528 mm at Thanjavur on November 27, 2008 (Cyclone Nisha)
562 mm at Avalanchi (Nilgris dt) on June 23, 2007
553 mm at Parsons Valley (Nilgris dt) on June 23, 2007
551 mm at Mukurthy Dam (Nilgris dt) on August 06, 2020
550 mm at Chennai on 21st October, 1846
540 mm at Mahabalipuram (Kanchipuram dt) on November 20, 1970
520 mm at Manalar (Theni dt) on 14 November, 1992
517 mm at Oothu (Tirunelveli dt) on 14th January, 2021
516 mm at Aanamalai (Coimbatore dt) on November 20,1959
510 mm at Mandapam (Ramanathapuram dt) on April 4, 2005
503 mm at Upper Bhavani (Nilgris dt) on June 17, 2007
500 mm at Vedaranniyam on November 18, 1918
500 mm at Palaviduthi (Tiruchirapalli dt) on October 31, 1981
497 mm at Mukurthy Dam (Nilgris dt) on 9th August, 2019
494 mm at Tambaram (Kancheepuram dt) on December 2, 2015
482 mm at Neyveli (Cuddalore dt) on November 9, 2015
480 mm at Cholavaram (Tiruvallur dt) October 22, 1969
480 mm at Papanasam (Thanjavur dt) on Novemebr 7, 1917
480 mm at Karaikal (Puducherry) on November 15, 1991
475 mm at Upper Bhavani (Nilgris dt) on June 23, 2007
475 mm at Chembarabakkam (Kancheepuram dt) on December 2, 2015
473 mm at Vembakkam Agro (Tiruvannamalai dt) on 13 November 2015
460 mm at Chennai on 24th October on 1857
457 mm at Kancheepuram (Kancheepuram dt) October 10, 1943
454 mm at Avalanchi (Nilgris dt) on July 17, 2009
452 mm at Nungambakkam (Chennai) on November 25, 1976
451 mm at Papanasam Dam (Tirunelveli) on December 1st, 2017 (Cyclone Ockhi)
450 mm at Upper Bhavani (Nilgris dt) on 9th August, 2019

Thanks to Mahesh from Ambai for the Manjolai data of 1992 event.

The records are work in progress, i have got 100 years of data across TN, it takes lot of time to check each individual stations and compile them. As and when data is available, the data will be updated.

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