El Niño/La Niña Update (May 2011)
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La Niña conditions continued across most of the tropical Pacific into early May
2011. After peaking in strength around January 2011, the oceanic components of
the episode weakened considerably, with a warming of the equatorial Pacific Ocean
during March and April, approaching neutral conditions by mid-May. Despite this
warming, the atmospheric indicators remained at near record La Niña levels during
April, weakening only in early May.
