A wave of warm water pooling in the central and eastern Pacific appears as a large area of higher-than-normal sea surface heights in this image from early November.
Published Nov 19, 2009
These color-coded images show the strengthening of El Niño between October and November 2009. In the November image, warm waters (indicated in red) have spread across the Pacific.
Published Dec 11, 2009
The near-record water temperatures of 2015-16 has been followed by a modest, quiet appearance of La Niña.
Published Jan 6, 2017
Weakening trade winds are allowing warm water to move east across the Pacific in a telltale pattern.
Published Aug 5, 2015
La Niña, the large area of cold water in the Pacific Ocean widely blamed for last summer's drought and often related to an increase in the number of hurricanes that make landfall, appears to be on its last legs.
Published May 10, 2000
With each passing month, 2015 looks more and more like 1997.
Published Oct 13, 2015
Cooler than normal conditions prevail in the central and eastern Pacific, but the event is so far considered weak.
Published Dec 22, 2017
Ocean conditions are not likely to help drought-stressed regions this spring. However, some broader changes might be coming in the Pacific.
Published Mar 25, 2015
After appearing for two consecutive winters, La Niña appears to be taking some time off.
Published May 4, 2012
