Dec-Feb 2011-12 Fourth-Warmest Such Period On Record For Lower 48 States - NOAA
The stats are in on the winter that wasn’t, and the December through February period stacks up as the fourth-warmest winter on record for the Lower 48 states, according to newly released numbers from the National Oceanic and Atmospheric Administration (NOAA).
The average temperature for the Lower 48 states during the December through February period, the time span defined as meteorological winter, was 3.9 degrees Fahrenheit above the 1901-2000 long-term average, making it the warmest winter since 2000. The other winters that were warmer than this one occurred in 1992 and 1999.
Winter was dominated by a northern storm track, which allowed mild air to repeatedly work its way northward, giving 27 states one of their top 10 warmest winters on record. Only one state — New Mexico — had winter temperatures below its 20th Century average, NOAA reported. In Massachusetts, February 2012 tied with February 1998 as the warmest such month on record, with average temperatures nearly 8 degrees F above average. New York's Central Park had its warmest February on record, with an average temperature of 40.9 degrees F, well above the typical monthly average of 35.3 degrees.
Interestingly, Alaska wound up having a near average seasonal temperature, despite the extreme cold that gripped the state during January.
EDIT
http://www.climatecentral.org/blogs/the-winter-that-wasnt-checks-in-at-4th-warmest-ever/