The December pac jet extension was the first issue-this delayed the pattern change to mid Jan. There was also very limited snow cover anywhere in North America by the end of Dec. When the cold and some snow did finally arrive, it was of short duration (and centered to our west) and even before it started models were showing warmth coming right back. At that point it was somewhat clear that it was an isle of cold in a sea of warmth, but the usual twitter suspects went with a big longer lasting pattern change which really never materialized....yess we had some colder days mid Feb and we absolutely lucked out with 2 moderate snow storms with some spot picking up 20 inches b/w the 2. Really lucky there...usually this type of winter is a shutout or close to it.