A January to remember for life time in Tamil Nadu - Stats and Records - Special update

There are around 500 number of Rain Gauge stations available in Tamil Nadu which are maintained by WRO, TNEB and mostly by Revenue Departments. There are then 30 observatory stations which are maintained by IMD for which records are available. Lets see what are the record broken in these observatories. Records might have been broken in other Rain Gauge stations, but historic data is not available for all years with me.

Even in observatories, in my 20 years of data collection, there has never been so many records broken for a single month and spread over coastal, west TN, Interior TN and South TN. January 2021 will remain as a special year.

I. Stationwise Records broken

1. Chennai Airport (Meenambakkam) – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 91.7 mm on 28.01.1947

24 hrs ATR for January was broken with 126.2 mm on 06.01.2021

Monthly

Previous January Monthly ATR – 1986 – 170 mm

New ATR for January Monthly Rainfall – 2021 – 230.9 mm (Till 14.01.2021)

2. Parangipettai, Cuddalore – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 153 mm on 01.01.1985

24 hrs ATR for January was broken with 283.2 mm on 13.01.2021

Monthly

Previous monthly ATR – 1985 – 256 mm

New ATR for January – 2021 – 545.8 mm (Till 14.01.2021)

3. Coimbatore Airport (Peelamedu) – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 33.4 mm on 03.01.1985

24 hrs ATR for January was broken with 112.8 mm on 07.01.2021

Monthly

Previous monthly ATR – 1985 – 64 mm

New ATR for January – 2021 – 183.6 mm (Till 14.01.2021)

4. Karur Paramathy – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 19.4 mm on 03.01.1991

24 hrs ATR for January was broken with 40.0 mm on 07.01.2021

Monthly

Previous monthly ATR – 1986 – 32.7 mm

New ATR for January – 2021 – 108.8 mm (Till 14.01.2021)

5. Erode – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 11.2 mm on 13.01.1997

24 hrs ATR for January was broken with 18.4 mm on 01.01.2021

Monthly

Previous monthly ATR – 1997 – 11.2 mm

New ATR for January – 2021 – 42.8 mm (Till 14.01.2021)

6. Tirupattur – 24hrs ATR Rainfall broken for January

24 hrs record in January was 12.0 mm on 16.01.1986

24 hrs ATR for January was broken with 17.8 mm on 07.01.2021

7. Vedaranyam – 24hrs ATR Rainfall broken for January

24 hrs record in January was 136.4 mm on 12.01.1986

24 hrs ATR for January was broken with 178.4 mm on 07.01.2021

8. Coonoor – Monthly ATR Rainfall broken for January

Previous monthly ATR – 1934 – 312.8 mm

New ATR for January – 2021 – 323 mm (Till 14.01.2021 5.30 pm)

9. Karaikkal – Monthly ATR Rainfall broken for January

Previous monthly ATR – 1986 – 223.5 mm

New ATR for January – 2021 – 241.4 mm (Till 14.01.2021)

10. Thanjavur – Monthly ATR Rainfall broken for January

Previous monthly ATR – 1990 – 118 mm

New ATR for January – 2021 – 165.5 mm (Till 14.01.2021)

11. Tondi – Monthly ATR Rainfall broken for January

Previous monthly ATR – 1991 – 204.5 mm

Netw ATR for January – 2021 – 260.8 mm (Till 14.01.2021)

12. Thoothukudi – ATR for both 24hrs and Monthly Rainfall broken for January

24hrs

24 hrs record in January was 93.6 mm on 16.01.1984

24 hrs ATR for January was broken with ___ mm on 14.01.2021 (over 100 mm reported)

Monthly

Previous January Monthly ATR – 1961 – 155.8 mm

New ATR for January Monthly Rainfall – 2021 – ___ mm (Till 14.01.2021) (has beaten 155.8 mm)

13. Others (which might break the record)

Kanyakumari – 114.3 mm ATR for January monthly rainfall in 1961. Till 14.01.2021 it has got 98.3 mm.

Pondicherry – 188.8 mm ATR for January monthly rainfall in 1985. Till 14.01.2021 it has got 152.6 mm.

II . Tamil Nadu All time Top January Rainfall years in last 120 years

in mm (100 mm and above)

Normal for TN in January is 18 mm

1921 – 141.2

1922 – 136.0

1920 – 135.9

2021 – 124.8 (till 14.01.2021) – High chance to break the ATR, 2021 deserves to be in No.1

1909 – 116.5

1943 – 112.0

Lets see the district rainfall and see how they have performed. This will show how good the rains in January are in 2021.

III. District Data for January Monthly Top 5 rainfall

1. Ariyalur District

1. 1923 – 436.7

2. 2021 – 206.0 (till 14.01.2021)

3. 1920 – 188.8

4. 1909 – 170.9

5. 1921 – 167.4

2. Chennai District

1. 1915 – 244.1

2. 1918 – 204.5

3. 2021 – 194.4 (till 14.01.2021)

4. 1920 – 179.8

5. 1995 – 172.6

3. Coimbatore District

1. 1943 – 108.2

2. 1921 – 102.3

3. 2021 – 93.5 (till 14.01.2021)

4. 1909 – 92.6

5. 1954 – 82.8

4. Cuddalore District

1. 1923 – 403.5

2. 2021 – 279.5 (till 14.01.2021)

3. 1921 – 260.8

4. 1920 – 249.0

5. 1926 – 227.4

5. Dharmapuri District

1. 1926 – 115.5

2. 1909 – 84.3

3. 1986 – 72.8

4. 1920 – 68.7

5. 1943 – 66.9

6. 1954 – 60.3

7. 2021 – 55.3 (till 14.01.2021)

6. Dindigul District

1. 1909 – 201.4

2. 1921 – 187.6

3. 1990 – 186.7

4. 1943 – 183.9

5. 1984 – 182.9

6. 2021 – 165.5 (till 14.01.2021)

7. Erode District

1. 1909 – 102.2

2. 1921 – 87.3

3. 1943 – 85.7

4. 1926 – 61.4

5. 2021 – 55.8 (till 14.01.2021)

8. Kancheepuram District

1. 1923 – 175.0

2. 1920 – 167.7

3. 1986 – 163.4

4. 1921 – 163.3

5. 1909 – 126.1

6. 1947 – 122.4

7. 1909 – 109.6

8. 2021 – 100.7 (till 14.01.2021)

9. Kanyakumari District

1. 1918 – 164.0

2. 1958 – 127.5

3. 1961 – 95.2

4. 2021 – 92.1 (till 14.01.2021)

5. 1934 – 92.1

10. Karur District

1. 1909 – 169.8

2. 1921 – 116.1

3. 2021 – 101.0 (till 14.01.2021)

4. 1943 – 74.6

5. 1934 – 73.5

11. Krishnagiri District

1. 1909 – 67.1

2. 1943 – 51.9

3. 1920 – 46.1

4. 1921 – 48.4

5. 1961 – 48,0

6. 1926 – 47.2

7. 2021 – 39.4 (till 14.01.2021)

12. Madurai District

1. 1943 – 214.7

2. 1921 – 199.2

3. 1990 – 158.1

4. 2021 – 124.7 (till 14.01.2021)

5. 1934 – 118.5

13. Nagapattinam District

1. 1923 – 435.51

2. 1930 – 375.1

3. 2021 – 261.1 (till 14.01.2021)

4. 1926 – 229.7

5. 1921 – 224.7

14. Namakkal District

1. 1909 – 87.1

2. 1961 – 71.1

3. 2021 – 60.0 (till 14.01.2021)

4. 1985 – 57.2

5. 1921 – 53.4

15. Nilgiris District

1. 1909 – 217.1

2. 1943 – 176.7

3. 1934 – 160.5

4. 1920 – 134.5

5. 1926 – 131.5

6. 1984 – 109.2

7. 2021 – 107.2 (till 14.01.2021)

16. Perambalur District

1. 1923 – 242.3

2. 1906 – 214.1

3. 1920 – 213.0

4. 2021 – 152.0 (till 14.01.2021)

5. 1963 – 134.3

17. Pudukottai District

1. 1923 – 336.2

2. 1921 – 290.6

3. 1990 – 181.0

4. 2021 – 172.2 (till 14.01.2021)

5. 1934 – 156.7

18. Ramanathapuram District

1. 1923 – 430.1

2. 1920 – 245.3

3. 2021 – 200.8 (till 14.01.2021)

4. 1985 – 193.7

5. 1921 – 162.1

19. Salem District

1. 1909 – 144.9

2. 1943 – 127.9

3. 1961 – 78.5

4. 1920 – 76.8

5. 1906 – 75.0

6. 1921 – 72.3

7. 1967 – 66.1

8. 1926 – 63.8

9. 2021 – 51.9 (till 14.01.2021)

20. Sivagangai District

1. 1985 – 240.0

2. 1921 – 219.7

3. 1920 – 174.0

4. 1923 – 171.7

5. 2021 – 157.8 (till 14.01.2021)

21. Thanjavur District

1. 1923 – 408.9

2. 1921 – 256.7

3. 2021 – 237.3 (till 14.01.2021)

4. 1920 – 210.9

5. 1963 – 159.5

22. Theni District

1. 1943 – 154.2

2. 1921 – 153.5

3. 1990 – 152.7

4. 1934 – 138.5

5. 1920 – 117.2

6. 1926 – 103.1

7. 2021 – 102.4 (till 14.01.2021)

23. Tirunelveli District

1. 2021 – 317.5 (till 14.01.2021)

2. 1918 – 207.6

3. 1920 – 202.9

4. 1934 – 186.9

5. 1963 – 185.0

24. Tiruppur District

1. 1909 – 137.2

2. 1943 – 110.9

3. 2021 – 98.7 (till 14.01.2021)

4. 1921 – 92.3

5. 1934 – 64.8

25. Tiruvallur District

1. 1918 – 221.0

2. 1920 – 211.8

3. 1906 – 191.5

4. 1986 – 178.2

5. 1915 – 138.2

6. 2021 – 127.5 (till 14.01.2021)

26. Tiruvarur District

1. 1923 – 436.9

2. 2021 – 306.4 (till 14.01.2021)

3. 1921 – 260.2

4. 1930 – 259.9

5. 1926 – 202.9

27. Thoothukudi District

1. 1918 – 306.4

2. 1961 – 196.2

3. 1920 – 191.6

4. 1990 – 159.7

5. 1934 – 152.3

6. 1902 – 148.8

7. 1943 – 147.7

8. 2021 – 123.7 (till 14.01.2021)

28. Trichy District

1. 1921 – 158.9

2. 1909 – 157.5

3. 1923 – 150.0

4. 1920 – 126.0

5. 2021 – 119.4 (till 14.01.2021)

29. Villupuram District

1. 1920 – 260.9

2. 1923 – 205.4

3. 1921 – 191.9

4. 1926 – 141.5

5. 1986 – 127.8

6. 1909 – 121.5

7. 1961 – 115.9

8. 1947 – 106.7

9. 2021 – 105.3 (till 14.01.2021)

30. Virudhunagar District

1. 1990 – 265.1

2. 1920 – 157.2

3. 1918 – 148.6

4. 1921 – 137.9

5. 1909 – 114.2

6. 1943 – 128.8

7. 1954 – 120.8

8. 2021 – 101.2 (till 14.01.2021)