A term used to describe the cataclysmic estimations of snowfall that weathermen predict (see: snowpocalypse) that in reality amount to just a few inches when the alleged snowpocalypse changes course or fizzles out and is thereby 'eclipsed' (losing or having lost significance, power, or prominence) by the idiocy of the wolf-crying weathermen.
Combination of 'snowpocolypse' and 'eclipse'.
Guy: Hey, did you hear the weather? There's a blizzard warning in effect for Manhattan for the next 24 hours. No school wooo!
Girl: Yeah yeah, don't bother stocking up on canned goods, it's just gonna be another snowpoceclipse.