Yes, admittedly here the snow hasn't drifted much, not enough wind so far - and if she possibly was found in a ditch, it's easy to understand, her not being found. We had three different snows here last year over eight inches, and of course in those conditions, all bets would be off. Still - in the 2" on the 17th/18th, I would expect someone to notice, though whether or not they would follow up, who knows; I'd think the dogs, though on leads, would, at least one of them, alert their walker to what they could smell, and arouse curiosity.
In fine, though, nothing would surprise me about this case at this moment.