Several intraseasonal events were observed through July, with other modes such as tropical cyclone activity also influencing the pattern.
A low frequency state favoring enhanced convection shifted slowly east from the eastern Indian Ocean to the Maritime Continent has been evident since July (green box).
Low frequency suppressed convection, tied to the developing La Niña conditions, has been apparent near the Date Line since late July (black box). A fast eastward propagating convective envelope was evident during early September.
More recently, robust negative OLR anomalies exhibited some eastward propagation, while the suppressed convection remained near the Date Line.