Observational data used to quantitatively describe the key elements describing avalanche danger: snowpack stability, the frequency distribution of snowpack stability, and avalanche size. The data set consists of - Rutschblock test results (Switzerland) - Extended Column Test results (Switzerland, Norway) - Avalanche occurrence data (Switzerland, Norway). The data were extracted from the respective operational databases of the national avalanche warning services in Switzerland (WSL Institute for Snow and Avalanche Research SLF Davos, Switzerland) and Norway (The Norwegian Water Resources and Energy Directorate NVE). For further information regarding the data, please refer to the publication or contact the author.