Rains in Northeast India to increase as Southwest Monsoon marks its onset over Nicobar Islands

May 20, 2019 10:28 AM |

The journey of Southwest Monsoon 2019 has finally begun as it marks its onset over Andaman and Nicobar Islands. Arriving earlier than its normal date of May 20, Monsoon has covered South Andaman Sea and some parts of South Bay of Bengal and Nicobar Islands.

Although there is time for Monsoon to mark its arrival over the northeastern states but still pre-Monsoon weather activities are picking up pace in the region. In fact, since the beginning of this month, on and off scattered rain and thundershowers with varied intensities are going on over Northeast India.

During the last 24 hours also, pre-Monsoon rains occurred in parts of Arunachal Pradesh, Assam, Meghalaya, Manipur, Mizoram, Nagaland and Tripura. In the last 24 hours from 08:30 am on Sunday, Tezpur recorded 22 mm of rain, Dibrugarh 16 mm, Gangtok 16 mm, North Lakhimpur 14 mm, Dhubri 5 mm, Pasighat 5 mm, Mazbat 2 mm and Pet Jorhat 1 mm.

These rains pre-Monsoon weather activities over the northeastern states are associated with the flow of south/southwesterly winds from Bay of Bengal. And as Monsoon has already marked its onset over Andaman and Nicobar Islands, these weather activities will become a routine.

Thus, we can say that even without the presence of any signficnat weather system over the region, rain and thundershowers of varied intensity will continue in parts of Northeast India. However, currently a cyclonic circulation is seen over Bihar, which will help in enhancing the rains over the northeastern states.

In the coming one week, we expect pre-Monsoon rain and thundershower activities accompanied with strong winds, lightning strikes and thunderstorm in Arunachal Pradesh, Assam, Meghalaya, Manipur, Mizoram, Nagaland and Tripura. Heavy rains are expected in parts of East Assam and Meghalaya.

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