Handy chart to distinguish AGW caused cold from regular cold: Learning To Distinguish Different Types Of Cold
'Jeff Masters says that this winter’s cold is due to global warming.
It is important that we learn to distinguish between natural cold, global cooling cold, and global warming cold. The chart below makes the distinctions abundantly clear.'
http://stevengoddard.wordpress.com/2014/03/04/learning-to-distinguish-different-types-of-cold/