Typhoon Kalmaegi in the South China Sea has made a landfall over southwest China-Vietnam coast but an induced low-pressure area persists in the Bay of Bengal.
The ‘low’ has sustained the monsoon over the peninsular east, with coastal Andhra Pradesh and Rayalaseema receiving moderate to heavy rainfall until this morning.
Thundershowers broke out also over coastal Odisha, north interior Karnataka, Konkan-Goa, Telangana, Kerala and Tamil Nadu during this period.
This is even as Typhoon Kalmaegi while making landfall seems to have sent in another wave over rainfall over Indochina, the Myanmar and Bangladesh coasts and northeast India.
Meanwhile, the northwest Pacific has produced a fresh tropical storm Fung-Wong, but it is forecast to track in the opposite direction towards Taiwan and further to the northeast eyeing Japan.
This would take away the residual monsoon flows heading into the Bay of Bengal, and oversee the weakening of the existing ‘low’ in the Bay somewhere over east India.
‘Big dry’ advancing
It would also help with the process of the withdrawal of the monsoon over northwest and central India. But some rain would linger over peninsular India, especially the western flanks, right until the month-end.
The ‘Big Dry,’ or the seasonal dry weather that follows the monsoon and coalesces into the winter, is shown as entrenching the west and northwest before covering the eastern parts of the country over this period.
Western and coastal Maharashtra, coastal Karnataka, parts of Kerala and south Tamil Nadu are looking like the last posts where the monsoon tail would wag during the last week of the month.
The next big weather event would be the arrival of the northeast monsoon (or monsoon in retreat) over peninsular India which would coincide with the onset of winter over north and east India.