New Delhi (NVI): Heavy rainfall is expected at isolated places in Karnataka, Kerala and Mahe till September 11, while rainfall is likely to be below normal over central and adjoining East India, according to India Meteorological Department (IMD).
The Met Office has said that a low pressure area lies over east central Arabian Sea off Karnataka coast with the associated cyclonic circulation extending upto 3.1 km above mean sea level.
It is very likely to weaken over the same region today. An east west shear zone runs roughly along 13°N across the cyclonic circulation associated with the above low pressure area at 3.1 km above mean sea level, it said.
It is very likely to persist during the next 3-4 days. Under its influence, fairly widespread to widespread rainfall and thunderstorm & lightning very likely over Peninsular India during next 4-5 days, as per IMD report.
Heavy rainfall is also very likely at isolated places in Tamil Nadu, Puducherry and Karaikal till September 9.
Isolated heavy to very heavy rainfall is also very likely over Coastal Karnataka on 9 and 10 September and over Kerala and Mahe on 8 September, the weatherman predicted.
The western end of monsoon trough at mean sea level lies near normal position and its eastern end lie north of its normal position, as per IMD. The eastern end of monsoon trough is likely to be north of its normal position or along the foothills of Himalayas during next 5 days.
Fairly widespread to widespread rainfall with thunderstorm and lightning and heavy rainfall at isolated places over Sub-Himalayan West Bengal and Sikkim and northeastern states is expected till 11 September.
Apart from that, overall, rainfall is very likely to be above normal over most parts of Peninsular India and normal to above normal over Indo-Gangetic plains (Uttar Pradesh, Bihar and West Bengal).
Development of features for monsoon withdrawal from western parts of Rajasthan is likely during the week.
-ARK
