The largest contribution in terms of rain during the pre-Monsoon season comes from Northeast India, as about 40% of the rainfall during this season is recorded only from this region, with Arunachal Pradesh and Assam & Meghalaya being the major contributors.
Starting right from March to April, this pre-Monsoon season, the northeastern states have been performing poorly, barring Nagaland and Tripura that managed to receive near normal rains. Rest all other states are currently suffering from large rain deficiency.
However, May began on a good note and some improvement was observed, especially after the arrival of extremely severe cyclonic storm Fani. Since that time, winds have changed direction and continuous rains are being witnessed by the northeastern states of India. This has also led to slight reduction in the deficiency.
Have a look at the current rainfall status over the northeastern states:
Now since the last two days, fairly widespread moderate rain and thundershower activities with few heavy showers are occurring over Arunachal Pradesh, Assam and Meghalaya. These states witnessed more than normal rains in the last 48 hours.
Rest states of Nagaland, Manipur, Mizoram and Tripura witnessed only light to moderate rains. The reason for continuous weather activities over Northeast India is the flow of southerly/southwesterly winds and the presence of a cyclonic circulation over Southcentral Bay of Bengal. Along with this, the cyclonic circulation over Bihar is also enhancing rains over the northeastern states.
Now the coming one week is also going to be full of pre-Monsoon weather activities with varying intensities. Rains will be more in Arunachal Pradesh, Assam and Meghalaya. Meanwhile, only scattered weather activities will occur in parts of Nagaland, Manipur, Mizoram and Tripura.
Moreover, even after a week full of rains, the deficiency of the region will not be able get covered up fully, only marginal improvement will be seen.
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Please Note: Any information picked from here must be attributed to skymetweather.com