Packed Powder - very dry natural or man-made compacted snow that is no more than 12 hours old
Packed Snow - packed surface of natural or man-made snow that has not been through a thaw-freeze cycle
Groomed Snow - machine groomed man-made or natural snow that has not been subjected to thaw-freeze cycles
Groomed Granular - old snow base that has been machine-groomed to provide loose granular surface
Loose Granular - old base that is loose and movable
Frozen Granular - hard-surfaced granular base that has been frozen after thaw and/or rain
Wet Granular - loose or frozen granular snow that has been subjected to warm temperatures and/or rain
Spring Skiing (Corn Snow) - old base that has been thawed and re-frozen numerous times by cold nights and warm days so that the surface becomes heavy
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