Using the 15-year ECMWF Reanalysis (ERA) data set and the Outgoing Longwave Radiation archive, a description of the effects of interannual variability on intraseasonal convection along the equator is presented. The El Niņo-Southern Oscillation (ENSO) phenomenon produces a significantly different environment over the central Pacific, which is a critical region in the life cycle of the Madden-Julian Oscillation (MJO). During the El Niņo years, the MJO is found to propagate farther eastward across the tropical Pacific, whereas it tends to become quasi-stationary over the western Pacific Warm Pool region in other years. Changes in the MJO's upper-level outflow and the associated low-level westerly wind bursts during El Niņo are examined. These interannual changes in intraseasonal processes result in changes in the downstream teleconnection patterns in both hemispheres