Why bother Monsoon onset which is just an announcement, Veppa Salanam Rains to start from today

October 16, 2020
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NEM onset or not, all rainfall from October 1 is considered under NEM quota stastically, so NEM onset is just for a press meet announcement, it does not signify anything else. From today veppasalanam rains will start in North, Delta and Interior Tamil Nadu and expected to continue for 5 days. As long it rains, why bother if the clouds are from west or east.

Today interpretation

With the new circulation in Bay of Bengal this one is very broad one and weak, so this will move in lower latitude. Unlike the previous two lows this will give good rains to North Tamil Nadu in the coming days.

Today Delta belt Nagai, Tiruvarur, Karaikkal, Thanjavur, Chennai, KTCC, Pondy, Cuddalore, Tiruvallur, Kancheepuram, Vellore and Ranipet districts will be in  action. In the hills side, Kodai, Nilgiris belt (ooty – Kotagiri – Kodanadu region), Erode around Sathayamangalam belt, Yercaud, Kodaikanal belt will all see rains.

Next 4 days looks very good for North Tamil Nadu and lets enjoy these spells 1st rather than worrying about onset of NEM

NEM to rock in November / December

One more news which i will stick too from the NEM outlook – NEM in November/December will be great one. And NEM for TN will end in Normal to above normal mode and for coastal areas it can end well above normal.

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All India SWM Rainfall Toppers and State Toppers from 01.06.2023 to 31.07.2023

August 1, 2023

All India Rainfall Toppers from 01-07-2023 to 31-07-2023
Min (4000 mm)

1. Mawsynaram, Meghalaya – 5871
2. Patagon, Maharashtra – 5000
3. Amboli, Maharashtra – 4860
4. Cherrapunji, Meghalaya – 4760
5. Thamini, Maharashtra – 4578
6. Dawadi, Maharashtra – 4344
7. Kaman, Maharashtra 4319
8. Matheran, Maharashtra – 4154
10. Walwan, Maharashtra – 4128
10. Dawadi Camp, Maharashtra – 4002

Maharashtra SWM Toppers from 01.06.2023 to 31.07.2023
(min 4000 mm)

1. Patagon – 5000 (July alone 4281)
2. Amboli – 4860 (July alone 4090)
3. Thamini – 4578
4. Dawadi – 4344
5. Kaman, Thane – 4319 (July alone 4009)
6. Matheran – 4154
7. Walwan – 4128
8. Dawadi Camp – 4002
9. Jor ~ 4000
10. Dajipur ~ 4000

Karnatata SWM Toppers from 01.06.2023 to 31.07.2023
(min 3000 mm)

1. Kodakani, Uttar Kannada – 3838
2. Castle Rock, Uttar Kannada – 3806
3. Hulikal, Shimoga – 3346
4. Mastikatte, Shimoga – 3118
5. Nilkund, Uttar Kannada – 3109
6. Mani Dam, Shimoga – 3098
7. Dodmane, Uttar Kannada – 3000

North East India SWM Toppers from 01.06.2023 to 31.07.2023
(min 1500 mm)

1. Mawsynaram, Meghalaya – 5871
2. Cherrapunji, Meghalaya – 4760
3. Khliehriat, Meghalaya – 2152
4. Passighat, Arunachal – 1787
5. Itanagar, Arunachal – 1589
6. Roing, Arunachal – 1516
7. Bhalukpong, Arunachal – 1500

Goa SWM Toppers from 01.06.2023 to 31.07.2023
(min 2500 mm)

1. Sanguem – 2885
2. Valpoi – 2802
3. Quepem – 2770
4. Margao – 2602
5. Ponda – 2542
6. Pernem ~ 2500
7. Mapusa ~ 2500

Kerala SWM Toppers from 01.06.2023 to 31.07.2023
(min 2000 mm)

1. Kakkayam, Kozhikode – 2405
2. Painavu, Idukki – 2117
3. Manjeeswaram, Kasargode – 2067
4. Payyavoor, Kannur – 2049
5. Peruvammuzhi Dam, Kozhikode – 2022
6. Padinjathara, Wayanad ~ 2000
7. Pullingome, Kannur ~ 2000

Tamil Nadu SWM Toppers from 01.06.2023 to 31.07.2023
(min 1000 mm)

1. Chinnakallar, Coimbatore – 1861
2. Avalanche, Nilgiris – 1803
3. Mukurthy, Nilgiris – 1406
4. Pandalur, Nilgiris – 1401
5. Periyakallar (Valparai PTO), Coimbatore – 1320
6. Cincona, Coimbatore – 1166
7. Devala, Nilgiris – 1161

Gujarat SWM Toppers from 01.06.2023 to 31.07.2023
(min 2000 mm)

1. Kaprada, Valsad – 2397
2. Visavadar, Junagadh – 2076
3. Vapi, Valsad – 2041
4. Khergam, Navsari – 2011
5. Umergam, Valsad – 2007

West Bengal Toppers from 01.06.2023 to 31.07.2023
(min 1500 mm)

1. Alipurduar – 2285
2. Banarhat – 2276
3. Mathabhanga – 1854
4. Hasimara – 1749
5. Jalpaiguri – 1618
6. Coochbehar – 1609
7. Maynaguri – 1577

Uttrakhand Toppers from 01.06.2023 to 31.07.2023
(min 1000 mm)

1. Loharkhet – 1828
2. Sama – 1520
3. Kapot – 1178
4. Dehradun – 1066

Islands Rainfall from 01.06.2023 to 31.07.2023
(min 500 mm)

1. Long Island, Andaman – 1782
2. Portblair, Andaman – 1096
3. Mayabunder, Andaman – 964
4. Aminidivi, Lakshadweep – 587
5. Car Nicobar, Nicobar – 579

Metro Cities (above 2.5 million population) Toppers from 01.06.2023 to 31.07.2023
in mm

1. Mumbai AP (Santacruz) – 2318 (excess)
2. Mumbai City (Colaba) – 1757 (excess)
3. Surat – 854 (excess)
4. Ahmedabad AP – 643 (excess)
5. Delhi City (Safdarjung) – 486 (excess)
6. Hyderabad AP – 416 (excess)
7. Jaipur AP – 400 (excess)
8. Kolkata AP (Dum Dum) – 363 (deficient)
9. Delhi AP (Palam) – 350 (excess)
10. Chennai AP (Meenambakkam) – 324 (excess)
11. Kolkata City (Alipore) – 324 (deficient)
12. Lucknow – 312 (below normal)
13. Pune AP (Lohagaon) – 273 (normal)
14. Chennai City (Nungambakkam) – 267 (excess)
15. Pune City – 238 (deficient)
16. Bangalore AP (HAL) – 227 (normal)
17. Bangalore City – 214 (normal)

Tamil Nadu Major Cities and Airport Rainfall from 01.06.2023 to 31.07.2023
in mm

1. Chennai AP – 324
2. Vellore – 293
3. Chennai City – 267
4. Pondy – 263
5. Salem – 161
6. Tirupattur – 160
7. Madurai City 156
8. Cuddalore – 149
9. Dharmapuri – 149
10. Karaikkal – 110
11. Thanjavur – 107
12. Madurai AP – 99
13. Nagapatinam – 90
14. Hosur – 75
15. Namakkal – 69
16. Trichy AP – 61
17. Coimbatore AP (Peelamedu) – 30
18. Kanyakumari – 25
19. Erode – 24
20. Tirunelveli (Palayamkottai) – 17
21. Karur – 11
22. Thoothukudi – 5
23. Pamban – 0

Driest Places in India 01.06.2023 to 31.07.2023
in mm (min 25 mm)

1. Pamban, Tamil Nadu – 0
2. Thoothukudi, Tamil Nadu – 5
3. Karur, Tamil Nadu – 11
4. Tirunelveli (Palayamkottai) – 17
5. Erode, Tamil Nadu – 24
6. Kanyakumari, Tamil Nadu – 25

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Tamil Nadu Weatherman Special: Mettur Dam is opened on the customary date of June 12 for 2nd year in a row

June 12, 2021

The opening day details of Mettur Dam since the dam was constructed and here it is. This is 2nd year in a row Mettur dam is opened on June 12th itself with good storage of water in the dam. The monsoon is going to be very active from today in western coast, Kerala, Karnataka cauvery catchments with back to back monsoon low forming in the north Bay. And in July too the monsoon looks good, so great days ahead. Initially 3000 cusecs has been released and it will be scaled up to 10000 cusecs by end of the day.

Great Flood years in Cauvery

The Mettur dam project work started on July 20, 1925 and after nine years of continuous work, the dam was commissioned on August 21, 1934. It has a gross capacity of 95630 mcft (95.63 tmc) and effective storage of 93470 mcft (93.47 tmc). Cauvery River has seen worst floods in 1924 with 4.56 lakhs cusecs flow just the year before dam work started. The other great flood years in Cauvery was in 1961, 1977, 1989, 1993, 2005 and 2018.

Opening stats of Mettur Dam

The customary date to release water from Mettur Dam is June 12 and in the 88 years of Mettur Dam history, lets see how many years the customary release has happened.

No. of years when dam was opened on 12th June : 18 (incl this year)
No. of years when dam was opened earlier than 12th June : 10
No. of years when dam was opened beyond 12th June: 60

In the last 88 years (incl 2021), the dam has surplussed 40 times so far. High chances exists for Mettur Dam touching 120 ft this year too.

The years when Mettur Dam is opened on or before 12th June are shaded in light blue.

Current Storage levels in main Dams in Cauvery Catchment

When you compare 2020 and 2021 on the same date, the storage levels are almost same. And with active days ahead, there will be huge increase in the storage levels by end of this month. So good days ahead for farmers in Tamil Nadu

 

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