The India Met Department has officially notified a watch for a new low-pressure area over northwest Bay of Bengal by tomorrow.
A preparatory upper cyclonic circulation persisting in the region stays in readiness to convert into what would be the fourth in a series of ‘lows’ to emerge from the Bay.
This series has overseen a turnaround in the fortunes of the Indian monsoon from the first week of July, after a washout during the first month of June.
The emerging ‘low’ could be followed by a weak one towards the end of the month, according to a few international weather models.
If this were to materialise, it would ensure carryover rain for mostly northwest and east India into the first week of August.
Meanwhile, on Saturday, the offshore trough off the west coast lies as a feeble and truncated one, extending from the Karnataka to the Kerala coast.
Coastal as well as south interior and north interior Karnataka have been major beneficiaries of this formation during the last couple of days.
Subdued in South
The weakened offshore trough also explains why the monsoon is currently subdued over the rest of interior peninsular India.
There is no big change in the conditions here for the time being. The behaviour and orientation of the emerging ‘lows’ would need to be watched for clues for next week.
The India Met Department is of the view that most parts of the West Coast may witness an increase in rainfall from Tuesday.
But the US Climate Prediction Centre suggests that the subdued monsoon conditions would stay through the week over interior peninsular India.
The Met subdivisions of Tamil Nadu, Rayalaseema, Telangana, coastal Andhra Pradesh, Vidarbha, Marathwada and Madhya Maharashtra may remain largely dry.