I've seen at least one diary using the name "Juno" to refer to the Great Blizzard of 2015 and felt I should chime in with my own diary rather than hijacking someone else's.
The Weather Channel, not the National Weather Service, is the entity that has been attaching names to winter storms and began the practice barely three years ago. The practice of naming winter storms is widely frowned upon by the larger meteorological community, and the NWS actively urges its employees to avoid using the names. None of TWC's private competitors uses the names, either. Only hurricanes and tropical storms have official names.
Using TWC's names has two consequences. First, since they have a habit of naming every other nuisance storm that doesn't have much of an impact, it has the effect of increasing the apocalyptic hype. Second, it lends an air of public legitimacy to what is both a ratings ploy and a poke in the eye of the government by a private corporation.