A low pressure is likely to form over the Bay of Bengal by Tuesday, triggering moderate to heavy rainfall across the State, especially in the north and the central regions, ahead of Onam. According to a weather bulletin issued by the India Meteorological Department (IMD) on Tuesday, an upper air cyclonic circulation lies over the northeast Bay of Bengal and adjoining Myanmar coast. Under its influence a low-pressure area may form over the north Bay of Bengal during the next 24 hours.
A trough runs from the cyclonic circulation to north coastal Odisha. Sunday’s upper air cyclonic circulation over the northwest Bay of Bengal off the north Odisha coast and neighbourhood has now merged with the trough. Under the influence of the system, the trade winds would be strengthened, bringing more moisture into the core monsoon region, and parts of central Kerala and north Kerala will get rains triggered by the enhanced westerlies.
