Approach via Stevens Canyon Rd, East Castle Basin, NE Foss Peak. Skied SW Foss Peak, and NE Foss Peak.
Dec. 23, 2017, 2 p.m. PST
Weather: Sunny, Cool, Light to Moderate ENE Winds.
Snowpack: Variable depth above 12/17 rain/ice crust (40cm-120cm+). Low density snow overall. Wind transport was observed in the late afternoon from the east and was slowly filling in ski tracks. South facing slopes were becoming sun affected and developing a thin crust in direct sun.
Area Description: Tatoosh Range - Castle/Foss Peak
Avalanches: Small natural point releases and larger skier triggered loose snow avalanches were witnessed and observed, especially on south facing slopes. South facing slopes triggered above 35* were running long at times; SSE Face/Ridge Castle AS Loose Dry D1.5 R2 1000'; SW Face Foss Peak Loose Dry N D1 R1 1000'; SW Face Foss Peak Loose Dry AS D1.5 R1 1200'; NW Face Foss Peak Loose Dry AS D1R1 100'.
Observation by Tod Bloxham
Did you see any avalanches? Yes
Did you trigger any avalanches? Yes
Was anyone caught in an Avalanche? No