There has been no progress on the monsoon coverage on Tuesday save for the persisting copybook-style heavy rain session over east and northeast India.
This is expected to continue as a causative north-south trough hung from sub-Himalayan West Bengal to North Bay of Bengal.
MOISTURE CONDUIT
The India Meteorological Department (IMD) located a cyclonic circulation at the head of the trough, which has helped intensified the weather in these parts.
The trough serves as a conduit for the moisture whipped up into the air by a long-persisting cyclonic circulation.
This moisture gets lifted up by the mountainous terrain, get cooled before being dumped on ground in the form of heavy to extremely heavy rainfall.
An IMD update on Tuesday said that Cherrapunji in Assam was battered by a massive 77 cm of rainfall overnight.
This came on the back of the 46 cm recorded here during the same interval a few days ago.
Meanwhile, a western disturbance with a potent induced cyclonic circulation has chugged its way into north Pakistan and adjoining Jammu and Kashmir.
WESTERN DISTURBANCE
The induced cyclonic circulation is situated not far off to the southwest – over central Pakistan and adjoining Punjab.
The combine is expected to bring some badly needed showers into north-west India, the IMD update said.
Rain has been forecast at one or two places over Punjab, Haryana, Uttar Pradesh, east Madhya Pradesh, Gujarat, Madhya Maharashtra, Marathawada and Vidarbha.
In the normal course, these western disturbances interact with monsoon easterlies from the Bay of Bengal and bring copious rains over the plains to bring the monsoon.
But it would be a solo act at least this time round, since there is no expectation of the easterly monsoon flows getting established over the region anytime soon.
SUBDUED RAIN
In fact, the IMD saw largely subdued rain activity persisting over northwest India and adjoining central India until the first three days of July.
Rainfall would be confined to the west coast and the Northeastern States. The wet session over east India may further scale up July 1.