This video by the Canadian Avalanche Association documents snowpack test procedures.
A variety of standardized snowpack tests have been developed to aid in assessing snowpack structure and stability. Common examples include:
- Compression test
- Extended column test
- Propagation saw test
- Rutshblock test
Avalanche forecasts that discuss weak layer reactivity and slab propagation propensity in relation to snowpack tests normally refer to these tests. Test results are generally more concerning and indicate greater instability when classified as 'sudden' or 'easy' and less so when labeled 'resistant' or 'hard'.
It is important to not put too much faith in a single test result. The safest way to interpret the results is to use them to potentially rule out skiing a slope, and to never use the result to rule-in skiing a slope.
For training in proper application and interpretation of these tests in the field, please consult an avalanche professional or attend a recognized training course.