Snow is of great importance for our life in Switzerland. Be it for winter sports activities, as an important reservoir for hydroelectric power plants or as a central component in alpine ecosystems. Global climatic changes are altering snowfall and thus also the snow cover in the Alps. Understanding these changes or measuring them in the first place is a major challenge: snow depths can vary greatly within a few steps: where there was a closed snow cover in the morning, you see green meadows in the afternoon. We have developed an innovative approach with our UZH spin-off ExoLabs, and based on satellite data, weather models and machine learning methods, we have reached a new milestone in snow mapping.