The El Niño Southern Oscillation (ENSO) is a well known phenomena across the world as it has far-reaching impacts that can be felt all over the world. ENSO is by definition a coupled interaction between the ocean’s thermocline and a circulation in the atmosphere known as the Walker circulation. Modification to the ocean’s thermocline leads to variations in the Walker circulation consequently modifying the jet stream which ultimately leads to worldwide impacts. The following maps have been developed by the Indiana State Climate Office in order to quantify some of the effects from ENSO in Indiana.