Deletion of 2013 global cold wave

Comment: as per Praemonitus.  The title is OR, but the unusual cold in many part of the world is surely linked in people's minds.  It should have a |descriptive title, not one which names the "event" - something like "Winter 2012–13 Northern Hemisphere cold spells" (notice the "s" which avoids tying the individual events into a widespread phenomenon
Stance: merge
Cited policy: Wikipedia:Article titles (WP:NDESC)