Island Alpine Guides AST field day observations


Island Alpine Guides AST field day within mount Washington boundary on west ridge of little washy. We avoided all avalanche terrain. Moderate to strong SE-SW winds sustained through day. Ski penetration 75cm. Snowing heavily throughout day. Shooting cracks observed. No avalanches witnessed, limited observations due to visibility. Compression tests showed easy results down 20cm progressive collapse. Moderate results down 70 resistive planar. And hard results down 93cm resistive planar on freezing rain crust. Snow was too deep to enjoy riding at lower angles.

Snow conditions were: Deep powder. Weather conditions were: Stormy, Windy. We rode: Dense trees, Mellow slopes. Riding quality was ok.

Avalache Conditions: 30cm + of new snow, or significant drifitng, or rain in the last 48 hours. Whumpfing or drum-like sounds or shooting cracks. Rapid temperature rise to near zero degrees or wet surface snow.


Easy compression test down 26 progressive collapse. Upper warmer snowpack collapsing onto lower density snow below. Moderate test down 70 resistive planar. Interface within storm snow. Hard test down 93 resistive planar on freezing rain crust.