The India Meteorological Department (IMD) predicted that heavy to very heavy rainfall is likely to hit the Northeastern states from September 21-23.
According to the National Weather Forecasting Centre/Regional Meteorological Centre, New Delhi of the IMD, a low-pressure area is very likely over Northeast Bay of Bengal by September 20.
It is likely to become more marked over Northwest Bay of Bengal during the subsequent 24 hours.
Strengthening of lower-level winds and its convergence along the west coast is also likely to continue during the next 3-4 days.
According to a report of RMC, New Delhi, it said, "Isolated extremely heavy falls also likely over Arunachal Pradesh and Assam & Meghalaya on 22nd and over Sub-Himalayan West Bengal & Sikkim on 22nd & 23rd September 2020."
According to the latest press release, available on its website, the IMD Guwahati said: "Fairly widespread to widespread rainfall with isolated heavy to very heavy falls likely over Northeastern states during 21-23 September. Isolated extremely heavy falls also likely over Arunachal Pradesh and Assam & Meghalaya on 22nd."
The western end of the monsoon trough continues to run close to the foothills of the Himalayas, it said.
The Eastern end of it now passes through Bareilly, Allahabad, Ambikapur, Jharsuguda, Chandbali and then southeastwards to East-central Bay of Bengal.
A cyclonic circulation extending up to 2.1 km above mean sea level lies over north interior Odisha &
neighbourhood.
"Strong Convergence of moist southwesterly/southerly winds from the Bay of Bengal at lower tropospheric levels over northeast India from 21 September onwards," it added.
