Ski wax Flexenarena — Lech Zürs am Arlberg

Why snow temperature decides on the Flexenarena

Race waxes are specified for narrow snow-temperature windows — a few degrees decide whether a base runs or goes blunt. Snow temperature deviates systematically from air temperature: at night the slope radiates heat and cools below the air temperature, during the day sun position, exposure and slope angle warm the surface. raceday.ski computes this evolution with a 3-layer energy-balance model and, for Lech Zürs am Arlberg, takes into account the terrain-derived horizon profile (shading) and the altitude of the calculation point — both validated against terrain models in a catalogue-wide quality assurance.

What this means for ski preparation

For race use, raceday.ski recommends a complete system of preparation, base wax, race wax, optional powder top layer and finish — tuned to snow temperature, snow type and moisture class at start time. The start time is an input of its own: a run at 10:00 runs on different snow than a floodlit slalom in the evening.