The convective phase of the Madden Julian oscillation (MJO) is forecast to strengthen in the same position over the next 2 weeks possibly lingering into March. To compensate for this vast region of convection, the downstream effect is an area of subsidence extending across South America. The influence on climate is profound. The immediate important influences include an expansive very heavy rainfall pattern over Southeast Asia, the eastern Indian Ocean and Indonesia while the influence on South America is to make the climate drier.