On December 20, 2007, the U.S. National Oceanic and Atmospheric Administration (NOAA) issued its weather prediction for the winter of 2007-2008. In forecasting weather for the continental United States, NOAA examines several factors, but first among them is the state of the El Niño/Southern Oscillation (ENSO), which leads to El Niño and La Niña. For the coming winter, NOAA predicted a moderately strong La Niña. During La Niña, sea surface temperatures in the eastern tropical Pacific are below average, and temperatures in the western tropical Pacific are above average. This pattern is evident in this temperature anomaly image for November...