Bhubaneswar: With onset of winter, Odisha may witness rainfall in December first week as a fresh low pressure is brewing over the Andaman sea again.

A low pressure area is likely to form over south Andaman sea around November 30. It is likely to become more marked and move westnorthwestwards during subsequent 48 hours, informed India Meteorological Department (IMD) DG Dr. Mrutyunjay Mohapatra today.

Under its influence, rainfall is very likely over the districts of Odisha from December 3.

Various models indicate that the system over the sea may turn into a cyclonic disturbance. However, it is too early to predict the wind speed and path of the possible cyclone, he said.

While the GFS Group of models is indicating emergence of a cyclonic storm from gulf of Thailand by the evening/night of November 30, the NCUM Group & ECMWF are indicating emergence of low pressure area in Andaman sea and formation of depression around December 2. Hence, probability of formation of depression over the Bay appears to be low.

The IMD chief advised the fishermen not to venture into the sea from November 30 to December 4 as the sea condition is likely to be rough during the period.