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(top) Average June wind vectors in 2007-2012 (orange) compared to 1981-2010 average (white). (bottom) Average geopotential height anomaly at 700 millibar pressure level in Junes from 2007-2012 compared to the long-term average (1981-2010) based on NCEP reanalysis data provided by the Physical Sciences Division at NOAA ESRL. Orange colors are higher-than-average pressure; blue is lower-than-average pressure.

Image Credit: 
Map by Dan Pisut, NOAA Environmental Visualization Lab, based on NCEP reanalysis data provided by the Physical Sciences Division at NOAA ESRL.