Well, the wait is over. Anthony Watts finally bothered to opine on the subject, cleverly mixing the minimization of the hottest spring and second hottest May with ad hominem attacks on James Hansen, as usual, and cherry-picked graphs, as also usual.
He begins with the press release from the National Oceanographic and Atmospheric Administration, then pivots to a claim that the five degrees above normal spring is the result of what meteorologists call a "blocking high."
One spot on the globe becomes the focal point and “proof” that AGW [global warming] is happening. This gets touted in the media..[b]ut this was found to be based on a synoptic pattern, basically weather noise. This spring in the USA is no different.
That makes sense, as long as you think of the spring in the Midwest in particular and the continental U.S. in general as "one spot."
Watts goes on to point out that it's still not nearly as warm as the l930's, so why worry?
This ignores what scientists call a "trend." Here's the NOAA chart for May over the last century:
The somewhat encouraging news is that the warm winter and the hottest spring in our recorded history does seem to have influenced public opinion, according to the most recent research (pdf):
The most recent survey results also indicate an increasing confidence among Americans that global warming is occurring. Just under two thirds of those who believe global warming is occurring stated that they were very confident of this position. This 63 percent confidence level is 14 percentage points higher than in the fall of 2011 and marks the highest level since the NSAPOCC began in 2008.
Respondents to the pollsters specifically indicated that the warm winters and spring have influenced their views. This is heartening, somewhat, because it indicates that most people still are open to observable data, unlike Watts and his zombies, um, followers.