The variable dangers of deep slab instabilities are some of the toughest things to predict when assessing avy danger. The persistent weak layers that cause these instabilities may be widespread or might just be found in isolated terrain pockets. The uncertainty of where these dangers may be lurking demands that you make important but difficult decisions regarding risk assessment and terrain selection. Poor decision making can have catastrophic consequences when your dealing with deep slabs.
This video by Bruce Tremper at the Utah Avalanche Center is an incredible tutorial on deep slab instabilities and shares valuable advice for how to manage terrain based on the uncertainties of the avy danger. This is some of the most important avy awareness info you will ever hear. Kick back and watch this whole video: