It is generally assumed that the PDO has been negative (cold) since about 1995-2000 thru 2013. However, what about the last 3 years? The PDO has been consistently positive since January 2014. How does one discern if this is short term noise in the midst of a still negative PDO, or, has the PDO now flipped to positive? If the latter, it would make the southeast US drought difficult to explain, correct?