Oceanic and continental convection have long been known to be different, specially in the intensities of updraft velocities. Open oceanic convection in the TWP is shown to generally moisten the upper troposphere, setting the stage for the formation of the very large intra seasonal oscillatory (ISO) convective events containing superclusters. The location of the warm pool centroid toward the dateline is speculated to probably favor the formation of typically oceanic convection and hence the ISO s. The location of the warm pool centroid is further shown to be related to the accumulation and discharge of the heat content