NEW: Central US Winter Storms February 2021 UPDATED: Arctic Amplification UPDATED: Winter Storm Risk Increase Video: El Niño Subsurface Ocean Temperature in 2015 by NASA Visualization showing sea surface temperature (SST) anomaly data and subsurface temperature anomaly data from Jan. 1, 2015 through Feb. 14, 2016. Go to Site Related Events Extreme El Niño 2015 - 2016 Related Climate Signals Extreme El Niño Frequency Increase