The trough in the easterlies running from the cyclonic circulation over Sri Lanka and adjoining southwest Bay of Bengal caused heavy to very heavy rainfall at a few places with extremely heavy rainfall at isolated places over Tamilnadu & Puducherry between 0830 hours IST of 30th October to 0830 hours IST of 31st October 2017. Due to establishment of northeasterly winds in the lower tropospheric levels along the east coast, Northeast Monsoon rains commenced over Tamilnadu & Puducherry, Kerala and adjoining areas of Andhra Pradesh and Karnataka on 27th October, 2017. Northeast Monsoon was Vigorous over Tamilnadu on 31st October and Active over Kerala on 28th October. Data Source: Indian Meteorological Department During the week (26 October to 01 November 2017) Only Sub-Divisions Assam & Meghalaya, Nagaland, Manipur, Mizoram & Tripura, Sub-Himalayan West Bengal & Sikkim, Tamilnadu & Puducherry and Kerala received excess/normal rainfall and Most of the Sub-Divisions of Northwest & Central India did not receive any rainfall.
During the week, rainfall over the country as a whole was 46 per cent below the long period average (LPA). .East & Northeast India received normal rainfall. Details of the rainfall distribution over the four broad homogeneous regions of India are given below:
Seasonal All India Rainfall as a whole (1st October to 1ST November 2017):
For the country as a whole, cumulative rainfall was nearly equal rainfall (0 per cent) of LPA as on 1st November 2017. Cumulative rainfall was largely deficient over Northwest India. Rainfall was excess to normal over the most of Sub-divisions of East & Northeast India and Southern Peninsula and few Sub-divisions of Central India. Details of the rainfall distribution over the four broad homogeneous regions of India are given below:
|Regions||Actual Rainfall mm)||Normal Rainfall(mm)||% dep. from LPA|
|Country as a whole||5.5||10.2||-46%|
|East & Northeast India||11.9||12.2||-3%|
|Regions||Actual Rainfall (mm)||Normal Rainfall (mm)||% dep.from LPA|
|Country as a whole||82.5||82.2||0%|
|East & Northeast India||179.7||132.5||36%|
The Southern peninsula (Mainly Tamil Nadu, Kerala and south Andhra Pradesh) is likely to get normal to above normal rainfall. Remaining regions of India are likely to get below normal rainfall. Outlook for the week (10-16 November 2017) The Meteorological subdivisions of East & Northeast India are likely to get above normal rainfall and remaining regions of India are likely to get below normal rainfall.
Delhi (Safdarjung) Mumbai ( Santacruz)
Kolkata Chennai Srinagar
Guwahati Nagpur Ahmedabad Hyderabad
- 26 OCTOBER 2017: TAMILNADU & PUDUCHERRY: COONOOR PTO-8; COASTAL KARNATAKA: MUDUBIDRE-9.
- 27 OCTOBER 2017: TAMILNADU & PUDUCHERRY: METTUPATTI-8; KERALA: PUNALUR-15.
- 28 OCTOBER 2017: TAMILNADU & PUDUCHERRY: KANGEYAM-7, ARUPPUKOTTAI-7, NATHAM-7; KERALA: KOCHI AP-15, ERNAKULAM SOUTH-15, KONNI-10
- 29 OCTOBER 2017: NIL
- 30 OCTOBER 2017: NAGALAND, MANIPUR, MIZORAM & TRIPURA: AIZWAL-10, SABROOM-9; TAMILNADU & PUDUCHERRY: ANAIKARANCHATRAM-9.
- 31 OCTOBER 2017: ASSAM & MEGHALAYA: HALFLOING-9; TAMILNADU & PUDUCHERRY: SIRKALI-31, PARANGIPETTAI-26, ANAIKARANCHATRAM-24, CHIDAMBARAM AWS-20, CHIDAMBARAM-20, TARAMANI ARG-19, TAMBARAM-, CHEMBARABAKKAM-18, POONAMALLEE-, CHENNAI AP-17 EACH, PONNERI-16, PAPANASAM-16, KVK KATTUKUPPAM ARG-15, ANNA UTY ARG-15, TIRUVALLUR ARG-15 EACH, K.M.KOIL-14, KARAIKAL-14, ANNA UNIVERSITY-14, CUDDALORE-14, DGP OFFICE-14, SRIPERUMBUDUR-13, CHENNAI(N)-12, SATYABAMA UTY ARG-12, KELAMBAKKAM-11, THIRUTHURAIPOONDI-10, RED HILLS-10, MAYILADUTHURAI-10, NAGAPATTINAM-9, CHOLAVARAM-9, TIRUVARUR-9, KUMBAKONAM-9, MAHABALIPURAM-9, KOLAPAKKAM ARG-9, ENNORE AWS-8, THAMARAIPAKKAM-8, VEDARANYAM-8, TRANGAMBADI-8, THIRUVIDAIMARUTHUR-7, CHEYYUR-7, NANNILAM-7, CHENGALPATTU-7, POONAMALLE ARG-7, MARAKKANAM-7; KERALA: KONNI-9.
- 01 NOVEMBER 2017: COASTAL ANDHRA PRADESH: GUDUR-8, VENKATAGIRI-7; TAMILNADU & PUDUCHERRY: PONNERI-10, CUDDALORE-9, ANAIKARANCHATRAM KOLLIDAM-7, PARANGIPETTAI-7, DGP OFFICE-7; KERALA: PIRAVOM-11, VAIKOM-8.