Route & General Observations
Toured up the NW ridge of Magnum to 3500′ where the ridge was heavily corniced. Checked out the recent cornice fall and then skied back down the ridge to the Sunburst parking lot, via the SW side of the main face.
Weather was mostly sunny, calm winds and temps were in the mid 20s to low 30s.
Supportable rain crust with surface hoar to 1500', then supportable rain crust with 1-3" of low density faceted snow on top to about 2000'. A hand pit around 2500' showed 8" of windslab over a firm crust. This slab broke away in 3" and 4" sections with a hand shear test. The corniced ridge was heavily wind-packed. The wind-sheltered SW slope we skied had 4-8" of light snow over the same firm crust. We observed surface hoar in the upper elevations (~3000'), some sun effect on the most south-facing aspect of the ridge, and many roller balls from 2500-1500'.
Eddies glide avalanche released evening of 2/10 or morning of 2/11.