The unusual warmth was also evident at Kodiak yesterday, where the high of 73F and low of 56F produced a daily mean departure from normal of +3.8 standard deviations. This would be pretty extreme if the temperature distribution were Gaussian, but actually it's nowhere close to Gaussian, as we've noted before. At this time of year, large positive temperature anomalies are much more frequent than large negative temperature anomalies, if we use the NCEI (formerly NCDC) 1981-2010 mean as the "normal". For example, since 1981 the largest negative temperature anomaly was -1.9 standard deviations, but +2.0 standard deviations has been exceeded 60 times. From a physical standpoint, this reflects the fact that there's no way for Kodiak to get much colder than normal in June, but it's not difficult to get unusual warmth advected from the mainland. The current situation is a great example of this.
The chart below shows the histogram of June temperature anomalies within the 1981-2010 reference period. Sometimes a Gaussian distribution assumption is a very poor one even for temperature.