I lived some 40 years in snow country (WV, W. Maryland and Montana) and not one time have I heard that word. Maybe my definition of snow country differs from yours. Maybe it's a case of a word that has been around forever yet rarely used.
Maybe it’s a regional word. It is widely known in eastern Washington and North Idaho. Probably western Montana, too. Probably like “soda” vs. “pop.” But it IS a different form than sleet, hail, or snow.