The wet weather will also reduce the mercury levels in the region as daytime temperature is forecast to remain below normal in this period.
According to the IMD, the humid southerly winds blowing in from the Bay of Bengal are likely to strengthen and they will produce fairly widespread to widespread rain and thunderstorms over the northeast from Sunday.
“Due to strengthening of southerly winds, fairly widespread to widespread rainfall activity with isolated heavy falls very likely over Northeastern states and adjoining East India from 30th May, 2021,” IMD said on Saturday.
According to the Regional Meteorological Centre (RMC), Sikkim, Assam and Meghalaya are likely to experience heavy showers at isolated places from Sunday to Tuesday, while Arunachal Pradesh will witness isolated heavy rainfall on Monday.
“Heavy to very heavy rain is likely to occur at isolated places over Arunachal Pradesh, Assam, Meghalaya, Nagaland, Manipur, Mizoram and Tripura. Thunderstorm with lightning is likely to occur at isolated places,” RMC said.
The IMD has issued a yellow watch over the entire northeast from Sunday to Tuesday, with the advisory urging residents to “be aware” of the local weather situation.
According to RMC, the districts within Assam that are prone to heavy rainfall include Dhubri, South Salmara Mankachar, Goalpara, Kokrajhar, Chirang, Baksa, Barpeta, Bongaigaon, Nalbari, Kamrup (rural), Darrang, Udalguri, West Karbi Anglong, Karbi Anglong and Karimganj.
As for Arunachal Pradesh, heavy rain is forecast in West Kameng, East Kameng, Papum Pare, Upper Siang, East Siang, Lower Dibang Valley, Dibang Valley and Lohit in and around Monday. This rainfall might increase the water level of the Brahmaputra, offcials said.
Since the pre-monsoon season in India on March 1, most northeastern states have received below average rainfall.