Distant effect of monsoon depressions- Part I: Effect of formation of depressions on rainfall activity along the west coast of India

At the time of formation of monsoon depressions over northwest/head Bay fore casters generally issue heavy rainfall forecast for the Konkan-Karnataka coasts; but heavy rainfall is not realised in all cases, In this paper we have analysed all the 111 depressions that formed over northwest/head Bay during the period 1956-75 with a view to identify the synoptic differences between the occasions when the monsoon depression forming over the Bay, increases the rainfall activity over the Konkan-Karnataka coasts and when it does not.