We continue to wrestle with the deep weak layers found in many areas in our forecast zone. Even though the potential is there for a large and destructive avalanche, the very low likelihood of trigger at this point fits it into the LOW hazard category. Its important to keep in mind that LOW hazard DOES leave room for avalanches! LOW doesn't mean you can turn your brain off and wander without a giving a thought.
We have given less potential for a persistent slab avalanche at upper elevations due to upper elevations tending to have deeper snow depths and more hard deep windslabs. Greater depth leads to lower temperature gradients, which tends faceted grains toward rounding and strengthening. Thick hard windslabs make it much more difficult to trigger deeper weak layers. Bear-in-mind though that shallow areas that are more sensitive still exist at upper elevations!