GUWAHATI, June 9 � The unfavourable Bay of Bengal wind flow was hindering the advancement of the South West (SW) Monsoon over the NE region of the country this time. However, conditions are now favourable for advancement of the SW Monsoon over some parts of NE India during the next 24 hours. The normal date for arrival of the SW Monsoon in the region is June 5.
Meteorologist Sunit Das of the Borjhar-based Regional Meteorology Centre (RMC) here told this newspaper that over Arunachal Pradesh rainfall and thunderstorm activities are on for the past about 48 hours. A similar condition also prevailed over Assam-Meghalaya Meteorological Sub-division, mainly over West Assam, during the same period.
West Assam is experiencing heavy to very heavy rainfall activities at isolated places during the past 72 hours, Das said.
It needs mention here that this time SW Monsoon onset over Kerala took place on June 6. The normal date for onset of SW Monsoon over Kerala is June 1. The normal date for onset of SW Monsoon over Assam is June 5.
The India Meteorological Department (IMD) has stated in its weather bulletin issued this evening that thunderstorm has been observed over Assam, coastal Andhra Pradesh and Lakshadweep between 8 - 30 am and 2-30 pm of the Indian Standard Time (IST) today.
It further said thunderstorm would occur at isolated places over Assam -Meghalaya, Nagaland, Manipur and Tripura in the NE region. Heavy rainfall would occur at isolated places over Arunachal Pradesh, Assam-Meghalaya today, tomorrow and day after tomorrow. Between June 12 and June 16, rain or thundershowers would occur at many places over northeastern states, it said.