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Coimbatore
Normal northeast monsoon for State
October 5, 2016
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
|
