India Met Department has said that the renewed monsoon spell would help it cover the entire landmass over the next three days. It is yet to enter parts of Madhya Pradesh, Gujarat and West Rajasthan.
This would happen as a northwest Pacific typhoon and a resident low-pressure area over Odisha combine to drive the monsoon to top gear for the first time after it made a weak and delayed onset almost 45 days ago.
This afternoon, tropical storm Rammasun in northwest Pacific has strengthened into the latest typhoon (cyclone) and is eying north and adjoining central Philippines for a landfall.
It will weaken thereon, but will wade into South China Sea, where it will re-intensify and make a second landfall over southeast China/Vietnam by the week-end.
From here, a remnant wave is likely to drift in over Laos-Thailand-Cambodia-Myanmar into Bay of Bengal to form another low-pressure area, according to initial forecasts.
This will signal another round of rains for East and Northwest India on the trail of an ongoing spell being overseen by a resident low-pressure area over coastal Odisha.
Flows strengthen
The strengthening of Rammasun from last night has witnessed a ramp-up in monsoon flows from the Arabian Sea and across the Indian peninsula into the South Bay of Bengal.
The ‘low’ over Odisha has been holding itself up even as a torrent of flows bypassed it to be pulled away into Rammasun.
Heavy to very heavy rainfall lashed the west coast overnight as the flows blasted furiously into the heights of the Western Ghats to lift up moisture only to get cooled and pour down in torrents.
Moderate to heavy rain lashed parts of central and peninsular India as also east India. In contrast, a heat wave gripped north Madhya Pradesh, northeast Rajasthan and parts of Haryana.
Two-week outlook
Meanwhile, model outlook for rainfall over the next two weeks suggests that key states in North India may continue to remain outliers in terms of expected distribution.
Met subdivisions of Jammu and Kashmir, Himachal Pradesh, Punjab, north and west Rajasthan, and parts of north and west Gujarat would see less than optimum rain.
In Central India and the South, a similar trend would prevail over south Madhya Pradesh, Maharashtra (except the coast), Karnataka (except the south interior and coastal), and south Kerala.
Rain surplus
Met subdivisions, which are likely to benefit from very heavy to heavy rainfall during the ongoing spell and the Rammasun-induced spell, would be as follows:
South and east Gujarat, Mumbai-Konkan-Goa, coastal Karnata, North Kerala, Madhya Pradesh, Chhattisgarh, Odisha, Jharkhand, Gangetic West Bengal, south Uttar Pradesh and south Bihar.
Moderate rain gains are indicated for east Rajasthan, Delhi, Haryana, Uttarakhand, north Uttar Pradesh and north Bihar.