Intense rainfall to continue over sub-Himalayan WB, northeastern region; Bihar and UP: IMD

Several components of the west coast, together with Mumbai and Konkan, and sub-Himalayan West Bengal had been pounded by exceptionally heavy rainfall on Tuesday and Wednesday, triggering extreme city flooding and landslides within the hills because the monsoon nears the beginning of its withdrawal part.

The India Meteorological Department (IMD) predicted very heavy rainfall in components of north-east India, sub-Himalayan West Bengal, Konkan. Bihar and japanese Uttar Pradesh (UP) for the following two-three days.

For instance, in Mumbai, the Bandra Kurla Complex (BKC) recorded 37 centimetres (cm) of rainfall on Tuesday night time; Dharavi (36 cm); Panvel (31 cm); and Santacruz (29 cm), triggering flooding within the metropolis and disrupting site visitors.

In West Bengal, Jalpaiguri and Bagdogra recorded 18 cm of rainfall every. IMD takes into consideration a 24-hour rainfall knowledge.

However, in line with IMD scientists many of the rainfall was recorded inside 12 hours – between Tuesday night time and Wednesday early morning. Updated rain knowledge for Wednesday might be accessible in a while Thursday.

“There is a convergence of strong moist southerly and south-westerly winds from the Bay of Bengal over the north-east and adjoining eastern India. This is the reason behind the region receiving heavy rainfall. There is a low-pressure system lying over central parts of western Madhya Pradesh (MP) which is likely to re-curve towards UP in the next couple of days and bring in widespread rainfall,” mentioned Okay Sathi Devi, head of the IMD’s nationwide climate forecasting centre.

There aren’t any indications of the graduation of the monsoon’s withdrawal from north-western India due to moisture incursion into the area, Devi mentioned.

IMD is just not seeing any parameters of monsoon withdrawal being met till September 28, in line with a press release by the division on Wednesday.

The monsoon season will formally finish on September 30.

Rainfall ought to cease fully; water vapour ought to scale back and an anticyclonic wind sample ought to set up itself earlier than the monsoon’s withdrawal is formally introduced, in line with Devi.

A low-pressure space is mendacity over central components of western MP. It is more likely to turn out to be much less marked by Thursday. However, the cyclonic circulation, which is related to it, is more likely to re-curve north-eastwards to Bihar throughout UP over the following three days.

Convergence of sturdy, moist southerly and south-westerly winds from the Bay of Bengal over the north-east and adjoining japanese India may be very possible till Saturday (September 26).

A trough, which implies a low-pressure space, is operating from north-east UP to northern Maharashtra.

Heavy-to-very heavy rainfall will proceed over sub-Himalayan West Bengal, Sikkim, components of Konkan, UP and Bihar till Saturday, in line with IMD.

The regular date for graduation of monsoon withdrawal from north-west India is September 17 and for full withdrawal from the nation is October 15, as per the brand new monsoon onset and withdrawal dates issued by the IMD in April.

Until final 12 months, the traditional date for graduation of withdrawal of monsoon was September 1 and October 15 for a whole withdrawal. The new onset dates are primarily based on monsoon knowledge from 1961 to 2019 and withdrawal dates are primarily based on knowledge from 1971 to 2019 analysed by scientists in IMD, Pune.

In 2019, the monsoon had began withdrawing solely on October 9 towards the traditional date of September 1 and extended rainfall had introduced a deluge to components of Maharashtra, Kerala and Bihar in August when rains normally scale back.

The monsoon had withdrawn fully solely by October 17.

In September, rains are 0.6% poor throughout the nation. Since June 1, the nation has recorded 8.1% extra rainfall, in line with the IMD.