Edmonton winter cycling veteran and fellow Bikeworks volunteer Robert Clinton has written a detailed lexicon naming the various snows and ices that winter cyclists encounter in our city. There is also a heaping helping of winter cycling philosophy and tips on dealing with these assorted conditions described. I'm hosting this essay on my blog and hope to add a few photos eventually.
It's a detailed treatise, so if you've time, settle in with a hot beverage and peruse it. I'd be interested to hear any of your own local names for the snows/ices he has catalogued.