Nil slab avalanches observed in the area, lots of sloughing in steep terrain. Up to 60 cm. thick, hard windslabs were found on the Opabin glacier in any lee features on September 11th. No whumphing or cracking but I still retreated at the base of the 40 degree slope to Opabin Pass. On the 12th Schaeffer bowl had much more settled moist snow and the slab was not an issue. I would assume snow stability improved somewhat below 3000m with warm weekend temperatures. However hard slab avalanches still concern me above 3000m in the OHara area. South aspects got enough sun to be noticeably drier by today. Still lots of rockfall to come when this storm snow starts to melt off the steep rock features. Grassi ridge wet for at least one more day.
Larry Stanier
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