NOAA: 2011 a year of climate extremes in the United States

http://www.noaanews.noaa.gov/stories2012/20120119_global_stats.html

Including 2011, all eleven years of the 21st century so far
(2001-2011) rank among the 13 warmest in the 132-year period of
record. Only one year during the 20th century, 1998, was warmer than
2011.

---SPSmith