Plots and information for the Physical Sciences Divison / Environmental Science Research Laboratory (PSD) US CLIVAR MJO Index.

Phase diagram showing the evolution of the last 40 days of observations along with the 15 day ensemble GFS forecast. The yellow lines are the twenty ensemble members and the green line is the ensemble mean (thick-week 1, thin-week 2). The dark gray shading depicts 50% of the members fall in this area and the light gray shading indicates 90% of the members.

PSD model forecast specifics.