noun: the figurative "rise" that is stimulated by news, rumor, or direct experience of a large accumulation of snow. Often experienced by those who pursue snow sports, e.g. skiing and/or snowboarding.
Skier: Hey did you see the story in the paper? Mount Furry Elephant got three and a half feet last night."
Boarder: Dude, I get a snowrection just thinking about it."