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23 Jan 2021, Edition - 2020, Saturday

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Coimbatore

Normal northeast monsoon for State

Covai Post Network

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There is a 60 per cent probability of a normal rainfall (19 per cent from mean seasonal rainfall) in all districts of Tamil Nadu during the northeast monsoon, according to Agro Climate Research Centre in Tamil Nadu Agricultural University.

District level rainfall forecast for the ensuing northeast monsoon (October to December 2016) over the state was developed at the Centre, based on the southern oscillation index of the summer season and sea surface temperature values of the Pacific and Indian Oceans, using Australian Rainman International V.4.3. software.

Historical rainfall data collected from Tamil Nadu Agricultural University stations were used to represent the district rainfall information. In the absence of data from the research station in a particular district, data from Rainman software were used.

District Wise forecast:

Agro Climatic Zone

North-eastern Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Chennai
731
788
7
Normal
Cuddalore
689
696
1
Normal
Kancheepuram
626
640
2
Normal
Thiruvallur
558
588
5
Normal
Thiruvannamalai
432
445
3
Normal
Vellore
348
348
0
Normal
Villupuram
455
498
9
Normal

 

North-Western Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Dharmapuri
355
329
8
Normal
Krishnagiri
302
289
4
Normal
Nammakkal
278
291
-4
Normal
Salem
366
369
-1
Normal

 

North-eastern Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Chennai
731
788
7
Normal
Cuddalore
689
696
1
Normal
Kancheepuram
626
640
2
Normal
Thiruvallur
558
588
5
Normal
Thiruvannamalai
432
445
3
Normal
Vellore
348
348
0
Normal
Villupuram
455
498
9
Normal

 

Western Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Coimbatore
343
328
4
Normal
Erode
323
314
3
Normal
Tiruppur
315
314
0
Normal

 

Cauvery Delta Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Ariyalur
552
544
4
Normal
Karur
344
314
9
Normal
Nagapattinam
968
937
3
Normal
Perambalur
432
440
2
Normal
Thanjavur
530
549
3
Normal
Thiruvarur
756
717
5
Normal
Tiruchirapalli
374
390
4
Normal

 

Southern Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Dindigul
437
435
1
Normal
Madurai
450
418
8
Normal
Pudukkottai
402
404
0
Normal
Ramanathapuram
517
490
6
Normal
Sivagangai
419
421
1
Normal
Theni
336
357
6
Normal
Thirunelveli
436
465
6
Normal
Tuticorin
438
425
3
Normal
Virudhunagar
415
418
1
Normal

 

Hilly Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
The Nilgiris
474
476
0
Normal

 

High Rainfall Zone
Predicted Rainfall (mm)
Normal Rainfall (mm)
Deviation (%)
Status
Kanyakumari
509
495
3
Normal

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