Buried surface hoar is a notorious weak layer that’s found in many areas in the southern Montana Mountains. Backcountry users should be aware that pockets of snow instability likely exist that are at least one level higher hazard than the avalanche forecast rating in any given area. These pockets are the main source of slides when the avalanche hazard is only rated as Moderate, which statistics show is the hazard forecast rating when many human triggered avalanches occur.
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