On and off rain and thundershower activities are going on over Northeast India since last one month. Recently pre monsoon rain and thundershowers have emerged over eastern parts of the country as well. West Bengal, Bihar, parts of Jharkhand and Odisha have been witnessing pre monsoon thundershowers since last 4 to 5 days.
South westerly winds from Bay of Bengal are feeding moisture over Northeast India and a trough is extending from Northwest Rajasthan to Manipur across Uttar Pradesh, Bihar and West Bengal.
These weather features will ensure that light to moderate rain with isolated heavy spell to continue over parts of Bihar, Jharkhand, West Bengal and Odisha and scattered light rain and dust storm over Eastern parts of Uttar Pradesh for at least next 3 to 4 days.
Scattered rain and thundershowers will continue over northeast India for next few days. A low-pressure area is expected to develop over South Andaman Sea which will gradually intensify into a depression and deep depression and will move towards north Myanmar.
Therefore, rain may be heavy to very heavy over Manipur, Mizoram, Tripura, Nagaland and parts of East Assam and East Arunachal Pradesh between May 8 and 10. Rain may subside over East India after one week. But North East India may continue to receive weather activities until onset of monsoon.