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While Heavy rain lashes down this October, know the reason behind this delayed monsoon

By Saima Siddiqui 
Updated Date

New Delhi: As the incessant rain continue to linger in many parts of the country, even though two weeks after the commencement of India’s second most-delayed monsoon withdrawal — all of this in month of October that is generally not known for a continuous downpour, experts opine a combination of factors such as development of low-pressure areas at multiple places and reversal of wind-direction that have made this October the wettest one since 1960.

Also Read :- Tamil Nadu: Schools, colleges to remain shut in these districts after heavy rain warning

According to the latest withdrawal charts prepared by the India Meteorological Department (IMD), the retreat from Maharashtra, delayed by about a week to 10 days compared to the long period average, is now nearing completion, while most of peninsular and coastal India is still under southwest monsoon circulation.

Here are some reason thought to be behind delayed monsoon:

– As per experts, last week, two low-pressure systems were active simultaneously, one each over the Arabian Sea and the Bay of Bengal regions and collectively, these triggered severe weather events over Kerala, Tamil Nadu, Andhra Pradesh, Telangana, Delhi, Madhya Pradesh, Uttarakhand, Odisha and West Bengal.

So far, the monsoon has withdrawn completely from the Western, Northern, Central and Eastern India regions. But it remains active over the southern peninsula. Thus, Kerala, Tamil Nadu, Telangana, Karnataka and Andhra Pradesh have had significant rainfall during the last 10 days.

Also Read :- Weather Update: Heavy rain and thundershowers likely over parts of Tamil Nadu for next 2 days

-Notably, the southwest monsoon season normally withdraws completely by early October. During the withdrawal phase, it causes thunderstorms and localised heavy rainfall. While this year, the withdrawal began only on October 6 against a normal of September 17.

For most days last week, at least two low-pressure systems remained active along the east and west coasts and over central India, bringing rains over large parts of the country.

Meanwhile, the monsoon had not withdrawn from Manipur, Mizoram, Tripura, parts of West Bengal and Odisha and entire southern peninsular until Monday.

– Generally, the monsoon winds reverse their direction of flow, by mid-October, from the southwest to the northeast. However, this year, due to the delay, there was heavy interaction of the western disturbances with the easterlies.

Furthermore, due to this delay in monsoon Kerala is facing a flood-like situation, while Himachal Pradesh and Uttarakhand have witnessed several deaths due to landslides caused by incessant rains. Heavy rain has battered West Bengal and parts of North-East as well.

Also Read :- Low pressure area over North Andaman Sea has intensified into a depression, likely to intensify into a cyclonic storm by October 24

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