PDR (powder): Cold, new, loose, fluffy, dry snow that has not been compacted.
PP (packed powder): Powder snow, either natural or machine-made, that has been packed down by skier traffic or grooming machines.
HP (hard pack): When natural or machine made snow becomes very firmly packed. The snow has never melted and re-crystalized, but it's been tightly compressed through grooming and continous wind exposure.
LSGR (loose granular): This surface results after powder or packed powder thaws, then refreezes and recrystalizes, or from an accumulation of sleet.
FRGR (frozen granular): This is undoubtedly the most misunderstood surface condition in ski reporting. Frozen granular is a hard surface of old snow formed by granules freezing together after a rain or warm temperatures.
WETPS (wet packed snow): Natural or machine made snow that has been previosly packed and becomes wet usually because of rainfall.
WETGS (wet granular): Loose or frozen granular snow which has become wet after rainfall or high temperatures.
WETSN (wet snow): Powder snow which has become moist due to a thaw or rainfall, or snow which was moist, as it fell.
SC (spring conditions): (only allowed to be used from March 1st on) This is the spring version of Variable Conditions.
WBLN (windblown snow): A windy day can blow the surface snow, either powder or granular, into drifts in some places, leaving a firmly packed base snow.
CORN: Corn snow, usually found in the spring, is characterized by large, loose granules during the day which freeze together at night, and then loosen again during the day.
ICY: Not to be confused with frozen granular, ice is a hard, glazed surface created either by freezing, or by the rapid freezing of snow saturated with water from rain or melting.
VC (variable conditions): When no primary surface (70% or more) can be determined, variable conditions describes a range of surfaces that can be encountered.
MGS (machine groomed snow): Snow that has been repeatedly groomed by power tillers so that the texture is halfway between loose granular & packed powder.