This Webcast, is an expert lecture by Dr. Vernon Kousky of NOAA/CPC, entitled "The El Niño-Southern Oscillation (ENSO) Cycle". The presentation covers the identification and global weather impacts associated with both phases of ENSO. This version of the presentation has enhanced graphics and has been modified to include an introduction to the newly established “Operational Niño Index” (ONI). A forecaster who attended the original classroom presentation on The ENSO Cycle had the following to say... “[This lecture was the] best presentation of the workshop! Very comprehensive, from the basics to the more complex issues, easy to follow, and great use of graphics. The presenter did an excellent job of relating the presentation topics to forecasters.”