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March 2011 Was Coldest March Since 1999 April 15, 2011
La nina graphic
While March 2011 saw La Niņa weakening, its cool waters were still widespread.
A waning La Niņa ocean-cooling in the Pacific was the driving force behind March 2011 stacking up as the coolest March worldwide since 1999, according to climate experts.

While La Niña weakened for a third consecutive month, John Christy of the Earth System Science Center at the University of Alabama says that it still managed to have a chilling influence on the global weather system.

March 2011 was also the 15th-coldest March on record, bucking the recent trend of a warmer global climate, according to Christy’s calculations.

Photo: NOAA