La Nina is expected to continue well into the Northern Hemisphere spring 2011.A moderate-to-strong La Nina continued during December 2010 as reflected by well below-average sea surface temperatures (SSTs) across the equatorial Pacific Ocean. All the the indices were -1.5C at the end of December, except for the easternmost region.
The current El Nino Southern Oscillation (ENSO) model forecasts have not changed significantly compared to last month. La Nina is currently near its peak and is expected to persist into the Northern Hemisphere spring 2011 at a less intensity.
This will continue to produce an enhanced northern storm track through southern Idaho, northern Utah and the Rockies of Colorado which have produced above-normal amounts of snow so far this winter.
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