AST 1 boulder creek

Drew Nylen

A nice day out in Boulder creek, with a keen group of AST students. The day was sunny and on an alpine slope above us around 1600m we saw evidence of an old windslab avalanche, likely from last weeks storm. In the valley bottom. 100-130cm of snow, with a well formed surface crust was present anywhere that wasn't very shaded. We dug many test pits and felt that east, west, and south aspects all had a mixture of crusts in the upper part of the snow pack and a weak layer of sugary snow down about 30-50cm that was reactive in tests, with very weak snow right at the bottom. On shaded true north, weak snow all the way to the ground.

Snow conditions were: Crusty, Hard, Powder. Weather conditions were: Sunny, Warm. We rode: Mellow slopes. We avoided: Sunny slopes. Riding quality was ok.

Avalache Conditions: Rapid temperature rise to near zero degrees or wet surface snow.