In the world of snow and avalanches, there are a lot of short hand abbreviations. Short hand documentation is used when recording avalanches, as well as when recording snow pits and stability tests. Having a foundational understanding of some of this shorthand can be useful when reading avalanche forecasts and communicating with forecast centers.
Want more? You can find all of these short hand symbols and more in the Snow, Weather and Avalanche Guidelines (SWAG). This is the professional handbook for documentation in the U.S..