Only just seen this, but a surprisingly rapid fall in what was a prolonged period of a positively neutral ENSO phase in the last couple of weeks:
If this continues not sure how it will effect global weather systems around that region, but with SST's actually increasing over pretty much all other parts of the N. Pacific, perhaps any potential effects will be neutralised.
Here in Ireland, a negatively neutral or borderline La Nina doesn't seem to bring anything specific during the summer. 2007 and 2008 for example were wet, while the summers of 2010 and 2011 were, if my memory serves me correctly, both rather bland. Summer 2013 also was in near La Nina territory and brought some very hot weather here, but in contrast, the summer of 1985, also a borderline La Nina summer, was by all accounts, nasty.