(CO) Corn Snow - Large ice-like granules, which are loose during above-freezing temperatures and which freeze together during below-freezing temperatures. Corn snow is usually a product of the above / below freezing cycle of temperatures typical of spring days. Large ice-like granules which remain frozen together in extended cold periods, or chunks of ice created by incomplete grooming or icy surfaces are not characteristic of corn snow.
(FG) Frozen Granular - Granular snow which was once wet and which has frozen together forming a rather solid or crusty-textured surface. It can return to loose granular after thawing or being worked by a grooming machine, or from the effects of skier traffic breaking up the crust. Frozen granular snow will support a ski pole stuck into it. However, if the pole makes ice chips and the surface will not support the pole, the surface is ICY. HP= HARD PACK - Hard pack snow is a dense, compressed snow condition harder than packed powder and softer than ice.
(HP) Hard Pack
(IS) Icy - Ice represents a hard, glazed surface usually created by freezing rain, or old surface snow melting and quickly refreezing again, or by ground water seeping up into the snow and freezing. Also may describe a very wet surface that has been skied into a smooth surface while above-freezing temperatures are existent and then rapidly dropping temperatures occur. When broken, ice breaks into chunks rather than granules. Patches describe localized occurrences of ice; surface describes a more prevailing icy condition on the slope.
(LG) Loose Granular - Loose granules similar to rock salt, usually formed after powder snow thaws, refreezes and crystallizes; or an accumulation of sleet. Loose granular also may characterize surface conditions produced by machine conditioning of frozen granular or icy surfaces.
(PP) Packed Powder - Loose powder snow compacted by rollers, drags or other mechanical apparatus or by skier traffic to a state which leaves little air space between particles. It is no longer fluffy, but it is not so extremely compacted that it is hard and icy.
(P) Powder - New snow generally of dry and fluffy consistency. Will not make a snowball easily.
(SC) Spring Conditions - This term is used to characterize the wide variety of surface conditions which results from the alternate freezing and thawing of snow cover in spring weather. This term is used in place of other terms when the usual surface descriptions cannot accurately or completely describe the situation, that is, when no single surface type covers at least 50% of the skiable surface of a trail.
(V) Variable Conditions - A wide variety of conditions which can not accurately or completely be describe using usual terminology, such as when no single surface type predominates.
(WG) Wet Granular - Loose or frozen granular snow which has become wet and soft after a thaw or from a rainfall.
(WETPS) Wet Packed
(WETSN) Wet Snow