. Located between two continents, two oceans, and on the equator, the Indonesian maritime continent is one of the world's major deep convection. With such a reality, Indonesia experiences a substantial risk of high climate variability and climate extremes. In order to deal with the impact of extreme climate, there is a need for a strategy to establish a nationwide early warning. With stressors of demographic tension and technology sophistication, the future early warning system should be broad reaching as well as quickly responsive to face dynamical changes. That early warning system should also be able to anticipate probable impacts and risks. The established system is a chain of observations in the field, data processing and analysis as well as adequate dissemination system. This paper reviews the early warning system that can be done by observation agencies with the user agencies in the agricultural sector through sharing of data, information, information system and customized information system. The ultimate goal being pursued is an online system that is responsive to changes that occur to maximum utilization in the agricultural sector.