Enter for a chance to win with the Avalanche Canada sweepstakes! Click here to find out more and get your entry.

Glossary

Persistent Weak Layer

Credit
Raven Eye Photography

An avalanche technician points to a buried persistent weak layer that failed during her snowpack test.

A persistent weak layer is a weak layer in the snowpack that resists forming a strong bond to neighbouring grains in the snowpack over an extended time period. They can be composed of surface hoar, facets, or depth hoar.