This Webcast, is an expert lecture by Dr. Roland Madden, where he describes the important climate-moderating feature, the Madden-Julian oscillation which is known more commonly as the MJO. The Webcast is presented in five sections and covers the identification and variability of the MJO. He also introduces some of the many global weather impacts that are associated with MJO occurrences. A forecaster who attended the original classroom presentation had the following to say…“This [lecture] was really the best yet! And hearing it from the "father" of the MJO made it so much better. It was so easy for me to empirically relate my years of observing the weather to this cycle. I am convinced this is where we can make the money in the improvement of 2 to 4 week forecasts in the next several years.”