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Temperature patterns in late fall/early winter of 2010 (left) and 2011 (right). Places that were up to 7 degrees F warmer than the 1981-2000 average are dark red, while places that were up to 7 degrees F cooler than average are dark blue. Based on temperature data from the NCEP/NCAR Reanalysis project, provided by NOAA Earth System Research Laboratory.

Image Credit: 
NOAA Climate.gov