According to the India Meteorological Department (IMD), there is a possibility of withdrawal of monsoon from Northwest India from October 6. However, widespread rain is also likely over East India and parts of Peninsular India till October 6. A Low Pressure Area is persisting over East Bihar and adjoining areas.
The cyclonic circulation formed from it extends up to the middle troposphere level. The Meteorological Department said that it is very likely to move north-eastwards and become less marked during the next 48 hours.
The North-South Trough is moving from this low pressure area towards North Interior Odisha. Under its influence, heavy to very heavy rainfall is very likely to occur over Sub-Himalayan West Bengal, Sikkim and West Assam, Meghalaya region during the next 24 hours. It said that heavy to very heavy rainfall is very likely to occur over Bihar and over Jharkhand and Gangetic West Bengal on October 4.
A Cyclonic Circulation lies over Southwest Bay of Bengal and adjoining Tamil Nadu. A trough is running from this cyclonic circulation from Karnataka Coast to East Central Arabian Sea, which is in lower troposphere level over Kerala coast over Southeast Arabian Sea. It is likely to persist for the next 2-3 days.
Under its influence, heavy to very heavy rains are likely over Tamil Nadu, Kerala, Coastal and South Interior Karnataka till October 6. Heavy rainfall is also likely at isolated places over South Konkan, Goa and South Madhya Maharashtra till 6 October.
A Cyclonic Circulation is also persisting over Southeast Arabian Sea off Kerala coast. Under its influence, a low pressure area is very likely to form over east-central and adjoining northeast Arabian Sea during next 48 hours, the forecast said.