When a huge winter blizzard surpasses a previous large winter storm (see snowpocalypse) and dumps copious amounts of snow in a place unprepared for such large snowfall amounts thus grinding entire transportation, retail, school and government systems to nearly a complete halt for several days. Results in extreme cabin fever leading to massive snowball fights and excessive photography.
The brief but intense relationship formed between strangers undertaking similar acts in the snow. This could encompass the respectful nod between two people Suicycling, talking to neighbours you have never spoken to as you shovel driveways, or asking the man beside you if he wants to grab a beer after pushing a stranded motorist's vehicle. Most snowmantic relationships are fleeting.
A snow (not defined by how many inches that fall) that affects a location not necessarily capable of dealing with snow, thus causing chaos (i.e. traffic jams, school closings, etc.)