Graupel
graupel—Heavily rimed snow particles, often called snow pellets; often indistinguishable from very small soft hail except for the size convention that hail must have a diameter greater than 5 mm. Sometimes distinguished by shape into conical, hexagonal, and lump (irregular) graupel.
From:
http://amsglossary.allenpress.com/gl...ch?id=graupel1
And, yes, as I understand it very nasty in terms of Avy danger.
Bookmarks