Unless you're from Canada, Alaska or Norway this saying will make absolute no sense to anyone:
> like fresh snow under foehn
> like fresh snow under foehn
I am from none of those places, speak no relevant languages other than English, and I had no trouble with the phrase in question.
I appreciate your effort in trying to stick up for me, though (: Perhaps if you want to be more helpful for those people who do conform to your assumptions, you could share a definition, in addition to your criticism.
"Fohn, an Englosh derivate of 'foehn', means 'a warm, dry wind', and is known for being particularly effective at melting snow."
Which coincidentally happens to have a similar contention as standing on fresh snow compacts it, but only from the comments did I guess it was supposed to be a melting analogy.